2024-03-28T19:13:45Zhttp://dugi-doc.udg.edu/dspace-oai/requestoai:dugi-doc.udg.edu:10256/112262015-10-14T00:00:52Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Banchs Burgués, Gemma
2015-10-13T07:33:39Z
2015-10-13T07:33:39Z
2015-06
http://hdl.handle.net/10256/11226
Tibicina quadrisignata is a specie that lives underground the main part of its life, but at the moment it gets the adult stage it moves to an aerial environment.
To achieve reproduction success, the male emits an specific sound to attract females. While they are singing, they exposes themselves to their predators. If life in this situation can be dangerous, when the environment conditions change it can pose a bigger risk to be exposed to the predators.
This study has been conducted in a forest area of Alt Emporda burned on 2012, specifically in the municipality of La Jonquera, trying to find out how much a change on their environment could impact the life of grasshoppers, focusing the impact study on the changes of exposure in front their predators.
The methodology used in this study has been divided in two parts. The first one consists in collecting data from the field, where some of the members of the Animal Biology Workgroup took pictures and collect data of the specie. And the second part where the author of this study analyze the vulnerability of the Tibicina quadrisignata of being haunted in a burned forest area instead of a common forest area. To do so, the author performed a test where the subjects were asked to find the grasshoppers in a total of 38 pictures taken on different kinds of field environments and gathering statistical times of every subject.
The main purpose of this study is to get specific results of the impact and vulnerability of the specie in two completely different environments
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Hemípters
Hemípters -- Efecte dels incendis -- Catalunya -- Alt Empordà
Depredació (Biologia)
Hemiptera
Hemiptera -- Effect of fires on -- Catalonia -- Alt Empordà
Predation (Biology)
Estudi sobre el comportament i vulnerabilitat a la depredació en Tibicina quadrisignata (cicadidae) en zones cremades i no cremades per l’incendi de l’Alt Empordà 2012
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/112282015-10-14T00:00:53Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Canelles Garcia, Arnau
2015-10-13T07:38:52Z
2015-10-13T07:38:52Z
2015-06
http://hdl.handle.net/10256/11228
The present study takes place in the fountain of “Can Verdaguer” and its associated canal. The area appears inside the municipality of “Sant Gregori”. Geologically, the fountain is located NE of the “Depressió de la Selva”, just on its limit with the “Serralada Transversal”.
The main objectives of this project are: 1) to know the geological origin of the water; 2) investigate the evolution of the algae biota along the canal, while the hydrochemical properties of the water change through its path and 3) to study in detail the water chemistry.
In order to accomplish these objectives, the following actions have been completed: 1) collect the existent information about the geology of the zone; 2) the development of a geophysical campaign (electrical resistivity tomography); 3) water analysis (pH, dissolved oxigen, water flow, redox potential, temperature, Cl-, Br-, SO42-, F-, Na+, NH4+, K+, Mg2+, Ca2+, NO2-, NO3-, PO43-, total P, total As, total B, total Fe, total Mn, total Rb and total Sr) along 11 sampling points and 4) the study of the algae biota present in the canal sediment by measuring some biological variables (Margalef Index, chlorophyll, biovolume, diatom density per cm2 and weight).
Taking into account the previous projects present on the scientific background of this fountain and the ERT profiles, it can be advocated that the deep origin of the water in the “Can Verdaguer” fountain is related to the water infiltration inside the fault of “Llorà” through the “Serralada Transversal”.
According to the hydrochemical point of view, the water of “Can Verdaguer” can be classified as sodium bicarbonate. In addition, it presents a slightly acidic pH, with high concentration of dissolved iron, calcium, sodium and bicarbonates. These chemical parameters are the ones that define, in a more representatively way, the chemical properties of this water system.
In relation with the algae biota, it presents in general, a prism morphology with an elliptic base. The main diatom species are: Navicula cincta and Achnanthes minutissima var. Gracillima. About the biological variables measured (Margalef Index, chlorophyll, biovolume, diatom density per cm2 and weight) all of them tend to increase as the distance of the canal increases too. Finally, it has been stated that the algae biota is significantly related with the hydrochemical properties of the water, especially with iron, dissolved oxygen, temperature, calcium and pH
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Font de Can Verdaguer (St. Gregori, Gironès) -- Aspectes ambientals
Aigua -- Anàlisi -- Catalunya -- Font de Can Verdaguer (St. Gregori, Gironès)
Water -- Analysis -- Catalonia -- Font de Can Verdaguer (St. Gregori, Gironès)
Font de Can Verdaguer (St. Gregori, Gironès) -- - Environmental aspects
Estudi de la font de Can Verdaguer: origen, evolució de les característiques fisicoquímiques de l’aigua i relació amb els ecosistemes associats
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/112312015-10-14T00:01:04Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Colell Campoy, Martí
2015-10-13T07:57:11Z
2015-10-13T07:57:11Z
2015-06
http://hdl.handle.net/10256/11231
We conducted this research in the Parc Natural i Reserva de la Biosfera del Montseny located in the Catalan pre-coastal mountain range (Serralada Prelitoral Catalana), which is dominated by a diverse forest landscape. That is why the forest is considered the most suitable place for the study of the climate change impact on forests. The rise of temperatures and the frequency and severity of droughts may end up altering the distribution in latitude and altitude of some forest species, depending on their vulnerability. Quercus petraea forests are likely to be colonized by Quercus ilex because it is a more resistant species and therefore in this study we work on the forest regeneration in order to see if the recruits indicate a settlement of species, which are less vulnerable to the forests with more risks. We have specifically calculated the recruitment of sessile mixed and pure oak forests and we have correlated this information with the ecological conditions of the forest. The results show that the regeneration has its optimum between 900 and 1000 meters and the density of the forest determines Q. petraea, as there are more of them when the forest is less dense. It is not the only species with such relationships as Q. ilex also suffers from densodependence but in another way, since it is mainly oak sprouts. As for the mixed oak forests, we have observed that a higher proportion of seedlings of Q. ilex. On the other hand, pure oak forests recruitment percentages are similar to the adult forest structure. Regarding to future evolutions, we see that oak forests, when they grow older, they lose their species richness of seedlings and juveniles, except for the forests that have maturity characteristics such as those in Fontdellops. Finally, we conclude that the effects of climate change would not be noticed until there was a very high recurrence of droughts and high temperatures since the oak forest presents recruitments that give them a significant resilience
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Repoblació forestal -- Catalunya -- Parc Natural del Montseny
Parc Natural del Montseny (Catalunya)
Reforestation -- Catalonia -- Parc Natural del Montseny
La Regeneració de les rouredes de Quercus petraea al Montseny
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/112322016-09-13T07:02:02Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Gómez Villarroya, Albert
2015-10-13T08:03:24Z
2015-10-13T08:03:24Z
2015-06
http://hdl.handle.net/10256/11232
This work focuses on a series of depressions located in inland areas of Alt Empordà (NE Catalonia), which in the past have been permanent ponds. The geological materials and structure of the subsoil and the existing hydrogeological relation with groundwater aquifers have been characterized.
Geological, geophysical and hydrogeological methodologies have been applied in this study. First, a geological bibliographic and cartographic synthesis of the region has been done, followed by the consultation of geotechnical reports available in the area, which allowed to identify and characterize the materials present in the subsoil. A morphometric analysis of the depressions established a direct relationship between them and the tectonic structures of the area.
Five geophysical electrical tomography profiles in the ponds of Closa Gran, Estanyet, Palol, Pradell and Púdol have led to characterize their internal geological structure. All of them show a similar pattern consisting of an endorheic sedimentary filling in the uppermost part of the depression. Below this filling, older sedimentary formations which also are present in the edges and the surrounding areas are fractured, deformed and vertically displaced towards depth. Three seismic refraction profiles in Closa Gran, Palol and Pradell, have served to determine the minimum thickness of the endorheic sediments in the central area. The geophysical results have allowed estimating the period of time when subsidence and sedimentation phenomena have been active, and the rate at which they took place.
The hydrogeological relations between ponds and aquifers have been surveyed by means of nine piezometric campaigns regularly spaced in time (June to December, 2014). A general flow of groundwater running from west to east has been identified. This action has been complemented by a hydrochemical study of groundwaters in the area, which has confirmed the presence of a deep, regional water flow.
As a conclusion, a conceptual model of formation and evolution of the studied depressions has been proposed. It is based on the existence of a water flow through deep limestone and evaporite units. This flow would rise across the discontinuities that represent the normal faults in this area and reach the Neogenen permeable sediments, where it woud have spread laterally. Periodical oscillations of the hydraulic levels would have caused suffosion processes, that is, the removal of the fine fraction of the sediments, and gravitational instabilities. These phenomena woud have been manifested in the surface as subsidence dolines
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Geologia -- Catalunya -- Alt Empordà
Hidrologia -- Catalunya -- Alt Empordà
Hydrology -- Catalonia -- Alta Empordà
Geology -- Catalonia -- Alta Empordà
Caracterització geològica, geofísica i hidrogeològica de zones morfològicament deprimides associades a estructures tectòniques de la depressió de l’Alt Empordà, entre Figueres i el riu Fluvià
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/112332018-01-22T10:38:12Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Guerrero Soliva, Aitor
2015-10-13T08:12:13Z
2015-10-13T08:12:13Z
2015-06
http://hdl.handle.net/10256/11233
The
work
presented
aims
to
show
which
methodology
has
been
used
for
the
creation
and
representation
of
the
uses
and
covers
of
the
land
in
two
different
periods
of
time
(1956
and
2013)
in
the
region
of
Bidasoa,
in
País
Vasco,
and
how
we
can
develop
an
analysis
related
to
the
ecology
of
the
landscape
with
the
results
taken
from
the
fulfillment
of
this
methodology.
To
carry
out
this
methodology,
we
have
had
to
acquire
the
images
belonging
to
the
American
flight
of
the
year
1956,
orthorectify
and
position
them
in
the
space
by
means
of
the
ERDAS
Imagine
9.1
software.
Then,
we
have
had
to
digitize
and
photointerpret
the
uses
and
covers
of
the
land
related
to
the
orthorectified
image
of
1956
and
the
current
image
of
2013.
This
process
was
performed
by
means
of
the
eCognition
software
in
order
to
obtain,
in
the
end,
images
in
raster
format
using
the
ArcGIS
10.1
software.
With
these
final
images,
we
were
able
to
carry
out
an
analysis
of
the
ecology
of
the
landscape
through
FRAGSTAT,
which
analyzes
spatial
patterns
in
order
to
quantify
the
landscape
structure.
The
results
obtained
from
the
methodology
are
the
two
maps
in
raster
format.
These
maps
are
the
basis
for
drawing
the
results
related
to
the
indices
of
the
landscape.
The
first
results
show
us
how
the
methodology
used
to
create
the
maps
of
the
uses
and
covers
of
the
land
is
really
innovative
because
of
its
speed
of
execution
and
effectiveness.
It
is
also
detected
how
the
landscape
has
evolved
to
a
greater
heterogeneity
nowadays
and
how
it
has
become
into
a
more
fragmented
landscape
although
with
more
diversity.
Finally,
humanized
process
is
clearly
seen
in
the
overall
structure
of
the
landscape
where
the
human
activity
has
a
key
role
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Ecologia del paisatge -- Guipúscoa (País Basc : Província)
Sòl, Ús del -- Guipúscoa (País Basc : Província)
Sistemes d'informació geogràfica
Landscape ecology -- Gipuzkoa (Basque Country)
Land use -- Gipuzkoa (Basque Country)
Geographic information systems
Land cover classification in a border landscape
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/112342015-10-14T00:01:03Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Nägeli Juan, Laia
2015-10-13T08:17:23Z
2015-10-13T08:17:23Z
2015-06
http://hdl.handle.net/10256/11234
Were studied the pattern of recruitment of glass eels (Anguilla anguilla) in the estuary of the Ter River, from January 2014 until March 2015. Every fifteen days (coinciding with the phases of full moon and new moon) and during three hours after sunset experimental fishing were performed at two points of the final stretch of the Ter River, in the estuarine area (Gola del Ter) and a point located 4 km upstream in the area of the Mas Capellana.
Were observed a seasonal pattern where the maximum recruitment of glass eels in the estuary of the Ter occurs in late fall and winter (October-February) and a minimum in the spring. There is also a daily pattern of variation of the catch from the sun, recording an increase of individuals during the second hour of sampling; whereas, the increase in Capellana is the third hour. The results also show that during the first hour of sampling the river glass eels penetrate better somatic condition and along a half times the weight of the eels decreases.
Were analyzed the biometrics of the species in relation to the evolution of the length, weight and color pattern. The medium data of length, weight and somatic condition were highest in the period of recruitment and more were falling progressively advanced accordance month sampling to reach minimum values in the spring.
Among the captured units, described seven stages of pigmentation (VA, VB, VIA0, VIA1, VIA2, VIA3 and VIA4). The pigmentation stadium was more abundant in the VB stage on the temporarily series and during the summer months was when it were captured individuals stages more developed that indicate that individuals spent greater time in the estuarine area.
Were carry out experimental fishing in two different phases of the moon, full and new, to determine whether there was a pattern with different light intensity favored the migration of glass eels and full moon is observed that most individuals captured although that would require a more detailed study on the influence of environmental factors that determine the entry of glass eels
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Anguila europea -- Ter (Catalunya : Curs d'aigua)
Anguilla anguilla -- Ter (Catalonia : river)
Seguiment del reclutament d'angula a l'estuari del riu Ter
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/112352015-10-14T00:01:07Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Peiris Castañer, Andreu
2015-10-13T08:24:49Z
2015-10-13T08:24:49Z
2015-06
http://hdl.handle.net/10256/11235
Cicadidae or Cicadas, like the majority of insects, are mostly unknown for most people including their life history and ecology such as the nymph emergence. Moreover the effect of fire to these particular animals is also clearly unknown so far.
We studied a population of Cicadas based on the nymph emergence among burned (one and two years after the fire) an unburned Aleppo pine forests. We used replicated plots to collect nymph exuviae (the abandoned exosqueleton after the last moult) once a weed across the whole emerging period (June to September). Nymphs collected were used to measure the abundance phenology of emerging nymphs, and the body size and sex ratio of cicadas. We used absolute density data from our plots to validate a new method of measuring relative abundance of emerging cicadas based on transects.
We found significant differences in the nymph phenology of cicadas between burned and unburned habitats, probably related to the vegetation cover and sunlight. Interestingly, we found an advancement of the nymph phenology in burned habitats that seems to be connected to the lack of vegetation cover on this area and the fast heating of the ground.
Despite these results, we didn’t find differences in size and sex ratio between burned and unburned habitats, maybe related to the sample size that was available. Nevertheless, we should consider do a further investigation on the size and sex ratio of cicadas to get a trustworthy result about their variation among burned and unburned areas.
To conclude, we found that the abundance estimates using the new transect method was highly related to our absolute density measures found in plots.
This study has provided me a new knowledge on cicadas and the role that they have in their ecosystem. Moreover, this study shows the alteration that the fire represents for these animals. Furthermore, knowing these significant alterations to the emergence phenology could be useful to further studies to assess the consequences in the ecosystem
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Hemípters -- Efecte dels incendis -- Catalunya -- Alt Empordà
Hemípters -- Efecte dels incendis -- Catalunya -- Baix Empordà
Hemiptera -- Effect of fires on -- Catalonia -- Alt Empordà
Hemiptera -- Effect of fires on -- Catalonia -- Baix Empordà
Calibratge d'un mètode d'estima de l'abundància de Cicadidae i fenologia d'emergència de Cicada orni a boscos cremats i no cremats
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/118562016-01-15T01:00:47Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Bellvert Bantí, Adrià
2016-01-14T08:30:56Z
2016-01-14T08:30:56Z
2015-09
http://hdl.handle.net/10256/11856
The spider’s order (Araneae) has received little attention and many aspects of their ecology
and distribution remain unknown. In the work that studied the changes in the community
throughout the year made until 2012, the “Pitfall" catch method was used to obtain the
samples. These methods are good for capturing epigean species and is considered to provide a
good picture of the communities that live in an area, but do not give us a representation of
tree species. 2012 was the year for the first study of spider communities present in the
treetops making an annual sampling. Given the scarcity of such studies, there was a decision to
study the evolution of the spider's annual community in the "Deveses de Salt" park by the
technique of Japanese umbrella, which allows to capture the treetop's individuals selectively
without damaging plant species. It is the first time that a study of this kind was performed in
the peninsula. The results from the Shannon-Wiener and Pielou indices showed that the
chosen location has a healthy community of spiders. More than 1300 individuals have been
captured belonging to 15 families and a total of 64 genera. Two of the species found are a first
appointment for Spain and one of them for the Iberian Peninsula. It has also been noted that
the fact of making a sample at a specific point of the year can cause a loss of community information. It’s been stated that at certain times of the year, depending on the study area,
temperatures can affect the spider community more, and more directly than previously
thought. With the correspondent analysis conducted it can be observed that some species
have a tendency to appear at certain times of the year, although earlier than described so far,
conducted in the most northern Europe. This study has revealed the lack of information that
we still experience in order to reach a better understanding of this order
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Aranyes -- Catalunya -- Salt
Spiders -- Catalonia -- Salt
Estudi de la diversitat d’aranyes a les Deveses de Salt
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/118572017-10-09T12:45:34Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Berengueras Fernández, Gerard
2016-01-14T08:35:39Z
2016-01-14T08:35:39Z
2015-09
http://hdl.handle.net/10256/11857
The density and the distribution of lesser noctule (Nyctalus leisleri) can be conditioned by
the structural heterogeneity and the availability of cavities in the wooden habitat. On the
other hand, ecological factors as the trophic availability or the protection from predators
probably are also conditioned by the forest structure. At the same time, wood structures
depend on the management made on the forests. In order to answer these questions, the
structure of beeches forests has been specialized in relation to relevant parameters for the
use of nest boxes and noctule population has been sampled in different structures of beech
forests in North–East of Catalonia. Therefore, it has determined the activity by means of
inspection of nest boxes. They have been reviewed periodically in summer, winter and
autumn during 2006 and 2014 a total of 382 nest boxes localized in different kind of beech
forests. The results we got in the characterization of the different beech forests show a big
contrast between them depending on the management to what they are being subjected :
It is evident a decrease in structural heterogeneity and availability of cavities in immature
beech woods and defectives. Whereas the results obtained for the taxes of occupation
show an increase of the activity of the nest boxes in diminishing the maturity of the forests
masses. It has been observed how the mature beech forests and the mature under
silvicultural management, registered some taxes of low activity, whereas beech clarified
woods and coppice woods registered a much higher occupancy rates. It has been observed
also as a good forest specialist, the small noctule tends to occupy much more boxes located
inside the forest, probably in search of greater thermal comfort and protection from
predation. The maturity of the forests and, consequently, the management done on them,
can influence in the distribution of lesser noctule on a wider geographic scale as it could be
in a massif or in a country.
It is recommended to focus the forest management of the beech woods of Catalonia on a
way to promote the density of big trees with cavities in the trunk, as well as the
interspecific heterogeneity and vegetative layers. It also presents as a valid alternative to
try to stabilize the populations of small noctules, the location of nest boxes in beech forests
where the natural shelter are scarce
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Ratapinyades -- Catalunya
Boscos -- Gestió -- Catalunya
Faigs
Forest management -- Catalonia
Bats -- Catalonia
Beech
Efectes de la maduresa del bosc sobre les poblacions del nòctul petit (Nyctalus leisleri) a partir de l’ocupació de caixes refugi en fagedes del nord est de Catalunya
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/118582016-01-15T01:00:53Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Català Ferran, Jordi
2016-01-14T08:44:51Z
2016-01-14T08:44:51Z
2015-09
http://hdl.handle.net/10256/11858
The final grade is made at Bassa del Burro, on the coast of Tamariu (Palafrugell) where the coast is rugged and tough, with high cliffs eroded by numerous inlets and small bays separated by capes. We can say that this landscape reflects the genuine name of Costa Brava.
In this area there are a set of freshwater springs located at the foot of a cliff. Water comes from the contact between the arenaceous weathered mantle and the unweathered granite rocks (weathering front). Unweathered granite rocks are highly impermeable materials, so these springs create a set of ponds colonized by a community of Phragmites australis .
In this community a new fungal species for science was discovered, the endemic mushroom Marasmiellus celebanticus. This makes these ponds a unique place in the world.
We should also mention the rich geodiversity of the area, which as a whole makes these ponds and their surroundings have great potential not only as a tourist attraction, but also educationally and scientifically.
However, the high number of tourists in summer, as well as the high frequency of hikers who do the GR-92, which passes precisely between the ponds, arecausing a degradation of the area.
We studied four selected ponds, which have been sampled for the different zoological and botanical species that live there. We also carried out detailed observation of the geological features that surround them.
After conducting the surveys and preliminary observations a set of measures were scheduled to correct or improve all aspects that may cause a degradation of the environmental conditions of this zone. The GR-92 way has been redefined to prevent passage through the habitat of this endemic species; It has also been suggested to build a wooden fence to ensure their protection and control of invasive flora with physical measures and promoting native plants in gardening neighbors.
This environmental management plan also includes a set of fun and entertainment strategies to introduce natural elements (biological and geological) into the area for all those involved as well as to attract the attention of the uninterested
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Ecoturisme -- Catalunya -- Palafrugell
Ecologia aquàtica -- Catalunya -- Palafrugell
Educació ambiental -- Catalunya -- Palafrugell
Aquatic ecology -- Catalonia -- Palafrugell
Ecotourism -- Catalonia -- Palafrugell
Environmental education -- Catalonia -- Palafrugell
Projecte de gestió de la Bassa del Burro de Tamariu (Palafrugell)
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/118592020-01-28T14:46:19Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Gil Arroyo, Carlos E.
2016-01-14T08:56:21Z
2016-01-14T08:56:21Z
2015-09
http://hdl.handle.net/10256/11859
In recent years it has detected the presence of pharmaceuticals and endocrine disruptors in aquatic environments. These compounds may accumulate in marine organisms such as fish and shellfish if longZterm exposure and consumption of these organisms occurs could cause a risk to human health. With the main objective to assess this risk arises the European project "Priority environmental contaminants in seafood: safety assessment, impact and public perception" (ECsafeSEAFOOD) within which development has this work. It has analyzed samples of fish and shellfish for human consumption, mainly from different European regions, but have also included some samples of imported organisms. The compounds under study were diruptores endocrine compounds (EDCs) particularly triclosan, methylparaben, bisphenol A and TBEP and pharmacologically active compounds (PHACS) such as diazepam, sotalol, azithromycin, carbamazepine, diclofenac, citalopram, venlafaxine and sulfamethoxazole. Two samplings were conducted at different times of year and also the second one of the samples were steamed. The analysis of samples was performed using two analytical methods multiresidue. The protocol followed for EDCs is based on the use of QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe [fast, easy, economical, efficient, robust and secure]). for extraction and purification sample, while for PHACS pressurized extraction with solvents (PLE) followed by a purification step with gel chromatography (GPC) was use. In both cases the detection and quantification of samples end was performed by chromatography coupled to mass spectrometry (UHPLCZMS) liquid. The results show concentrations of triclosan reaching 183.8 ng/g d.w in North Sea mackerel, and 36.4 ng/g d.w of bisphenol A in canned mackerel from Portugal. Furthermore, there has been an increasing concentration of EDCs when samples were steamed until reaching 75.4 ng/g d.w of bisphenol A in gold. Regarding levels PHACS the highest value was 11.72 ng/g d.w sulfamethoxazole of mussels from Holland. Although the levels detected in some cases are considerable not exceed the maximum levels permitted by the EU. To EDCs measured levels would not present any risk to public health in
accordance with the tolerable daily maximum values recommended by the World Health Organization (WHO)
spa
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Disruptors endocrins
Peixos -- Efecte dels medicaments
Peixos -- Efecte dels productes químics
Peixos -- Efecte de la contaminació de l'aigua
Marisc -- Efecte dels medicaments
Marisc -- Efecte dels productes químics
Marisc -- Efecte de la contaminació de l'aigua
Endocrine disrupting chemicals
Fishes -- Effect of drugs on
Fishes -- Effect of chemicals on
Fishes -- Effect of water pollution on
Seafood -- Effect of drugs on
Seafood -- Effect of chemicals on
Seafood -- Effect of water pollution on
Análisis de fármacos y disruptores endocrinos en peces y moluscos destinados al consumo humano
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/118602016-01-15T01:00:46Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Martí Ballabriga, Alexandra
2016-01-14T09:01:46Z
2016-01-14T09:01:46Z
2015-09
http://hdl.handle.net/10256/11860
The combination of MBR membrane technology with reverse osmosis (RO) for wastewater treatment has been proven to provide a very high quality effluent. The MBR efficiently removes nutrients (C, N & P) from the influent wastewater together with suspended solids and colloids making it suitable to feed it to a RO membrane which removes most of the remainder of the dissolved compounds, to produce very high quality effluent which is of drinking water quality. The main advantages of the wastewater treatment systems based on MBR technology are the quality of output water and the need of little installation space, in comparison with conventional activated sludge (CAS) systems. However, fouling particularly of the RO membrane, remains a problem when using the RO membrane as a final stage in a wastewater reclamation plant. Membranes require frequent chemical cleaning processes to control the build-up of organic, inorganic and biological fouling on the membrane surface. As the membrane gets fouled, increasing amounts of energy are required to produce the same amount of product water. Therefore it is essential to understand what is causing the fouling and what control measures must be applied to achieve long-term sustainable operation.
The objective of this project is to understand how the composition of the RO influent water (MBR effluent) in terms of inorganic contaminants, temperature, pH and the system recovery affects membrane fouling. To achieve this objective, the feedwater of an MBR-RO pilot plant located at Quart was studied to obtain a characterisation of RO feedwater quality. The results of a membrane autopsy were used to see what types of membrane fouling are observed during operation. An RO membrane simulation model was then used to understand through multiple simulations how the feed water quality, temperature, pH and system recovery affect membrane fouling, the product water quality and the energy consumption. The results are then used to propose strategies to control membrane fouling and optimize process operation in terms of energy use and permeate quality.
The results from the autopsy and those from the modelling studies confirm that the main component of inorganic fouling is Calcium Carbonate (CaCO3) particularly on the concentrate side of the membrane (the end of the membrane). On the feed side of the membrane, organic fouling was predominant. The modelling studies showed that the addition of acid to control the pH could control the CaCO3 precipitation. Furthermore, we have shown that the optimal process recovery to run the RO membrane at the lowest energy consumption for different feedwater temperatures between 24 and 27ºC is 70-75%.
The final part of the project utilized online process data to monitor membrane fouling during pilot plant operation and normalize process data in terms of permeate flux and salt rejection
cat
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Reactors de membrana
Aigües residuals -- Depuració
Aigües residuals -- Plantes de tractament
Sewage -- Purification
Sewage disposal plants
Membrane reactors
Predicting and Controlling RO Membrane Fouling treating Wastewater Effluent
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/118612016-01-15T01:00:52Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Martorell Sala, Arnau
2016-01-14T09:13:36Z
2016-01-14T09:13:36Z
2015-09
http://hdl.handle.net/10256/11861
Human activity generates waste water that must be treated before returning to the receiving
environment. WWTP are designed and operated to remove contaminants present in the
wastewater so that the impact on the receiving environment is permitted; however, WWTPs,
like any industrial activity or production process also generate some environmental impacts.
There is the need to minimize these impacts both existing plants and possible extensions of
plants with new technologies for purification stricter limits. The life cycle analysis is a widely
accepted method of evaluation and interpretation of the environmental impacts of a process
or product.
The aim of this study is to evaluate the potential environmental impacts of the Manlleu WWTP
through life cycle analysis (LCA), which is a methodology that takes into account the use of
materials, energy and discharges into the environment during the construction stages,
transportation, operation and dismantling. The life cycle stages considered in the study were
the construction and operation of the WWTP. The environmental impact during the operation
phase of a WWTP is due to energy consumption, use of chemicals, emissions to air and water
and sludge production. Also taken into account the use of materials for the construction of the
plant and has been ruled out include the dismantling process. For the construction phase, we
have analyzed the consumption of building materials from the budgets of the civil works and
the operation phase inputs (energy, chemicals...) and outputs (water, sludge, emissions... to
the atmosphere) system. The functional unit chosen for the study was the volume of treated
water for 20 years. Inventory data during the operation phase are taken from different
operation controlling documents of the WWTP 2014. Finally, it was considered that the WWTP
has a lifespan of 20 years.
For evaluation of the inventory life cycle analysis it was used SimaPro® software and the
impact categories analyzed were: Climate Change, Ozone Depletion, Eutrophication
Freshwater, Marine Eutrophication, Human Toxicity, Metal Depletion and Fossil Depletion.
The results obtained from the inventory show that the operational phase of the plant has
more impact than the construction phase in almost all categories studied. The separate
analysis of each stage of the plant indicates that the secondary treatment and pre-treatment
are those with a greater impact due to increased consumption of chemicals and high energy
consumption.
This study shows that to achieve a lower impact on the water purification process more
efficient technologies, opt for chemicals with low environmental impact and reduce the
environmental burden of energy consumption in the process need to apply
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Aigües residuals -- Depuració
Aigües residuals -- Plantes de tractament -- Catalunya -- Manlleu
Cicle de vida del producte -- Aspectes ambientals
Product life cycle -- Environmental aspects
Sewage -- Purification
Sewage disposal plants -- Catalonia -- Manlleu
Aplicació de la metodologia de l’Anàlisi de Cicle de Vida (ACV) a una depuradora de fangs actius (Manlleu)
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/118622016-01-15T01:00:54Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Puigfarregut Llordés, Anna
2016-01-14T09:17:43Z
2016-01-14T09:17:43Z
2015-09
http://hdl.handle.net/10256/11862
The bleak Alburnus alburnus (L.) is a cyprinid species inhabiting mainly lentic
environments. Its diet is based on zooplankton and land insects and its reproductive
period takes place during the seasons of spring and summer. This species, native to
most of Europe, was introduced in the Iberian Peninsula in the 90’s, where it has
spread becoming invasive.
On the one hand, this study expects to examine the biological treats of one native
population of bleak from Saône River, located at east of France. On the other hand,
the aim is to compare this species biological treats with other native populations from
the southeast of France (Chappaz et al., 1987) and introduced populations in the
Iberian Peninsula. Specifically, populations from the Catalonia internal basins (Masó,
2012), from the Atlantic slope rivers and from river Ebro (Latorre, 2013). The
specimens were captured by electrical fishing, during the spring of 2014. Lately, the
specimens were processed in the laboratory so it was possible to analyse the following
biological traits: total length (TL), total weight (TW), gonads weight (WG), minimum
length at maturity (Lmm) for females, sex ratio, gonadosomatic index (GSI) and Le
Cren (LK) and Fulton (K) index condition. Moreover, population size and age structure
were determined too and fecundity and mean egg diameter were determined for
females.
It seems that the ecological conditions of the basin are determinant of the populations’
status. After comparing the populations, it can be deduced that in stable lentic
environments, bleak establishes easily and presents a minimum length at maturity
similar to the native ones and low values of GSI and gonads weight. However, in
changeable environments, the populations are under expansion phase, with a lower
minimum length at maturity and a higher reproductive potential. Thus, although the
population from Saône River presents high values of GSI and gonads weight, the
females’ minimum length of maturation allows for deducing that the population could
be well established.
Between native populations, the one from Saône River shows lower fecundity values
and less growth. The results suggest that these biological treats are determined by
various factors, such as bleak’s diet, among others. Additionally, the zone of the river
where bleak is found could be another determining factor for growth and fecundity.
Moreover, the differences observed in the maximum ages of each population could be
explained by the mentioned factors and the environmental conditions of the zone
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Ciprínids -- Reproducció
Cyprinidae -- Reproduction
Estudi de l'estratègia reproductora d'una població nativa d'alburn (Alburnus alburnus)
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/118632016-01-15T01:00:58Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Tañà Fornés, Meritxell
2016-01-14T09:22:23Z
2016-01-14T09:22:23Z
2015-09
http://hdl.handle.net/10256/11863
Nowadays a large part of Catalonia’s sewer systems are combined sewer systems, which means that they are deriving the rain water and the wastewater together into the Wastewater Treatment Plants (WWTP). These systems were considered as problematical, furthermore if the city has an old sewer system like La Garriga. During heavy rainfall events when the conduits’ capacity is reached, there is a wastewater outfall through the outlets. The polluted water flows directly into the river. This causes high contamination with heavy metals, nutrients, pesticides and other compounds which became a negative impact for the environment. One way to achieve the reduction or to avoid these wastewater outfalls is to implement Sustainable Urban Drainage Systems (SUDS) with the aims to maximize the infiltration of the ground water to recycle it into the natural water cycle, to reduce the volume of water which flows into the conduits, to minimize the urban flooding and reduce the urban damages consequently. If we complement SUDS with storm tanks we can achieve better results related with the number and the volume of outfalls and attenuate the flow peaks created for the rain events.
The purpose of this final work is creating or designing four possible scenarios with SUDS complemented with storm tanks for evaluate the efficiency of the scenarios on the current model. We started the project ENDERUS in 2014 with a calibrate model of La Garriga’s sewer system developed in ICRA (Institut Català de Recerca de l’Aigua) with the SWMM program (Strom Water Management Model). Subsequently, the dates are transferring into KOSIM, which is a software for continuously simulation, by Institut für technische-wissenschaftliche Hydrologie GmbH (Itwh) from Germany to built this four scenarios and run simulations to quantify and evaluate all the parameters related with outfalls and runoff-models of La Garriga. The last part of this study is selecting the best scenario, which presents the best percentages, values until 40% of reduction in the volume and number of outfalls, the peak of the flows increase 0.5m3/s, and other improvements we will obtain if we choose this scenario. Finally, we made out an approximated budget (10.905.750€) for the implementation of 20% of SUDS in each area and built two storm tanks with 1500m3 of volume, to give a approximate inversion for the city of La Garriga
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Aigua de pluja
Aigües residuals -- Depuració
Clavegueram
Rainwater
Sewage -- Purification
Sewerage
Anàlisi cost-benefici per la implementació de sistemes urbans de drenatge sostenible (SUDS) al municipi de La Garriga
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128572019-03-06T08:56:34Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Abbas Via, Nura
2016-10-14T08:57:14Z
2016-10-14T08:57:14Z
2016-09
http://hdl.handle.net/10256/12857
Biofilms are structures formed by a group of microorganisms such as bacteria, algae and fungi. These, are surrounded by extracellular polymeric substances which they secrete and are essential for the biofilm structure and stability. Biofilms can be found worldwide in many conditions and in extreme environments, such as salty lagoons of the Monegros Desert (Spain), our sampling area. The aim of this study is determine de content of the microorganisms that define the biofilm structure of four lagoons (La Playa, Salineta, Chiprana 1 and Chiprana 2), to observe if the salinity and the drought gradient affect them significantly. In the laboratory we applied some techniques such as EPS extraction, which is used to estimate the amount of polysaccharides present in the lagoons. It has been also used the DAPI staining to determine bacterial density, based on the staining the bacteria and make a subsequent recount. Another technique used has been ergosterol extraction, which is used to determine fungal biomass, carried out in an solid-phase extraction and separation and a subsequent HPLC reading. We have also analyzed the nitrates, phosphates and ammonium from the water of these lakes, and it has been estimated the water content and the algal biomass too. The results show similar and high values of microorganisms, mainly bacteria, and high EPS content in the four lagoons, but surprisingly, there are also high values of fungi, which were initially expected to be lower due to the lack of water and moisture in some areas and the extreme salinity. The two more salty lagoons and less affected by extreme drought conditions had more fungal biomass but very low algal biomass, in costrast to the two Chiprana lagoons that showed a higher drought extreme conditions and had high algal biomass and very low fungi biomass. In all the lagoons the EPS content was high, but specially in Chiprana 1. This means that some of these microorganisms may adapt to these severe conditions, either becoming stronger or by protection mechanisms such as extracellular polymeric substances. This fact leads to form microorganisms with very special characteristics and which are able to tolerate higher salinities than the Mediterranean Sea
cat
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Biofilms -- Aragó -- Monegros
Ecosistemes -- Aragó -- Monegros
Biotic communities -- Aragon -- Monegros
Biofilms -- Aragon -- Monegros
Anàlisi estructural del biofilm microbià de les llacunes salades dels Monegros
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128582016-10-15T00:00:54Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Alarcón Padilla, Berta
2016-10-14T09:30:09Z
2016-10-14T09:30:09Z
2016-09
http://hdl.handle.net/10256/12858
The aim of this study is to evaluate the greenhouse gas emissions with the Life Cycle Analysis (LCA), in order to compare the carbon footprint of both management systems of sewage sludge in the region of Maresme. This evaluation driven by the Maresme Regional Council (hereinafter CCM). The first scenario that arises is what is done currently, which consists of the distribution of the sewage sludge to composting plants that don’t belong to the organization. The second scenario is intended to implement a new system in the near future and take care of the management of the new sludge anaerobic digestion plant Wastewater Treatment Plant (hereafter WWTP) at Alt Maresme Nord that has two anaerobic digesters with the sufficient capacity to process all the sludge in the region. The process that takes place is a sludge stabilization and transformation of organic matter into biogas, a gas with a high calorific value, which later on can be used to generate heat and electricity. In both treatments there is areduction of sludge volume, which will result in a section that can be used as fertilizer in agriculture as a final disposal for both cases. The scope of the study is based strictly on the transport and energy used in each of the scenarios, which means that there are many other important elements left out. The results show a large amount of CO2 emissions avoided for the new type of treatment and management due to savings in the itinerary of the distribution unification favoured by the final destination point. However, there should be a much more extensive study on the constraints that exist for each of the technologies and their benefits, because depending on the scope and type of emissions quantification methodology it could generate major changes. It is important to consider all categories of LCA to make an assessment of all environmental impacts not only on climate change as there may be other impacts that are not being detected. However, it can be concluded that the sludge could become in a near future a new beneficial resource to supply us with energy, especially with the new technologies’ improvement possibilities.
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Llots de depuradora
Sewage sludge
Aigües residuals -- Depuració -- Catalunya -- Maresme
Sewage -- Purification -- Catalonia -- Maresme
Anàlisi de la sostenibilitat mitjançant la petjada de carboni en la implantació d'un nou sistema de gestió dels fangs de depuradora
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128632016-10-19T00:00:54Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Caro Romero, Sandra
2016-10-18T09:14:56Z
2016-10-18T09:14:56Z
2016-09
http://hdl.handle.net/10256/12863
The increase in global energy consumption in recent years and the resulting
axhaustion of fossil resources such as oil are encouraging the development of new biofuels
with a lower carbon footprint as alternative sources of renewable energy.
Recently, research has prioritized the production of biofuels from carbon dioxide (CO2).
This may be if high interest because it solves the problem of increasing prices in basic
foods and also helps to mitigate the greenhouse effect. However, the methods
proposed to date require large infrastructure, and are expensive and energy inefficient.
Thus, a team of researchers from the Laboratory of Chemical and Environmental
Engineering (LEQUIA) of the University of Girona have first described an innovative
method for optimizing the production of butyrate via microbial electrosynthesis based
on CO2 as the only carbon source. This involves using electric currents to stimulate
carbohidrotrofic microorganisms to fix CO2 into organic compounds of high value to low
pH values. During this process, intermediate products are obtained such as butyric
wich has numerous applications and therefore interesting to extract and recover.
To date, we have developed several technologies for the separation and recovery of
organic acids have been developed, which will minimize the amount of sample and
reagent consumption as well as the use of expensive and toxic solvents. This paper
presents two techniques for the extraction and recovery of acetate and butyrate: liquidliquid
extraction with organic solvents and extraction by hollow fiber membranes. The
latter is considered to be a reliable technique that can provide high performance and
requires simple and inexpensive equipment.
The aim of this work is the extraction and recovery of acetic and butyric acids through
liquid-liquid and hollow fiber experiments; and the evaluation and optimization of
various parameters in order to obtain these two main compounds using liquid
supported membranes
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Àcids orgànics
Biocombustibles
Organic acids
Biofuels
Recuperació de butirat i acetat produïts a partir de CO2
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128652016-10-19T00:00:58Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Colom Montojo, Pau
2016-10-18T09:32:49Z
2016-10-18T09:32:49Z
2016-06
http://hdl.handle.net/10256/12865
La Pletera, located north of the river Ter’s mouth, is one of the few salt marshes that is kept nowadays in the Catalan coast. Its great biological richness and high productivity comes from the brackish lagoon system, in which there are: two natural lagoons (Bassa de Fra Ramon and Bassa del Pi) and a newly established lagoon (Pletera Nova). To preserve and restore this area partially constructed, the LIFE NATURA project of restoration is being carried out (LIFE Pletera Project, 2014). Framed within the LIFE Pletera project, a study about the ecological state of the marsh before restoration was performed. The objectives of this study have been: (i) to determine the composition and structure of the zooplankton community and to study its relationship with the temporal pattern of flooding and the degree of eutrophication of the lagoons; (ii) to determine the resilience of the aquatic community after a disturbance depending on the type of disturbance and the degree of eutrophication of the lagoons. (iii) to evaluate the applicability of different models described for temporary lagoons in the permanent lagoons of La Pletera.
During the study, four flood-confinement periods were observed. In each of these situations two characteristic situations have been observed: an increase in the water level and a reduction in salinity after a disturbance were observed; afterwards, a progressive reduction of the water level and an increase of the saline concentration were noticed. In a nutrient multivariable analysis of the different lagoons two principal dimensions have been identified. The first dimension related to the accumulation of nutrients, whereas the second related to the nutrient input episodes. In the second dimension, significant differences between the different lagoons have been found. However, the pattern of succession in the composition of species seems to be the same for the different lagoons, determined by a temporal factor. The water level of the lagoon is the structuring and disturbing element that is related both to the size structure as well as to of the community´s resilience. In the analysis of the different disturbances, there is a greater resilience to winter disturbances than to summer disturbances.
We conclude that the temporal pattern of flood-confinement of the different lagoons is the key factor to explain the species composition, the size structure and resilience after a disturbance of the lagoons. In constrast, other factors such as the age of the lagoon or the nutrient load are less important factors. In reference to the resilience, different trends between the different lagoons have been found. Interestingly, autumn-winter disturbances are more resilient on the three lagoons than spring-summer disturbances. Differences in nutrient load between Bassa del Pi and Pletera Nova, but not between Pletera Nova and Bassa de Fra Ramon, suggest that the size of the lagoon might be one of the causes for these differences, in addition to the antiquity of the lagoons. Finally, differences in the described models for temporary lagoons were probably caused by the presence of fish in the lagoons of La Pletera
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Fauna aquàtica -- Ter (Catalunya : Curs d'aigua)
Albuferes -- Ter (Catalunya : Curs d'aigua)
Aquatic animals
Lagoons
Composició i estructura de la comunitat de zooplàncton de les llacunes de La Pletera
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128662016-10-19T00:00:52Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Felipe Risueño, Adra
2016-10-18T09:44:11Z
2016-10-18T09:44:11Z
2016-06
http://hdl.handle.net/10256/12866
The increase in rural tourism and the accentuated sensibility towards the conservation of our natural environment are encouraging multiple new initiatives to supply the public with its demand for activities related to nature. Faced with this situation, and responding to the proposal made by the Mont-ras town hall, this project creates a set of itineraries for the dissemination of the geology of the “Morena” quarry and its surrounding area.
Based on bibliographical research and geological surveying carried out in the field – in which the main environmental aspects of the area around the “Morena” quarry were examined- an inventory has been created, utilizing forms specifically designed for this purpose. These elements have been classified and put into a hierarchy, and those selected have been analyzed using a specific set of interpretive criteria. This methodology has facilitated the choice of only the optimum elements, which were deemed suitable to be included into the itineraries, and to be exposed to the visitors.
Two itineraries were created; “The route of the 4 mines” and “The Morena quarry”, directed mostly to the schools and colleges of the province, but also to the general public interested in discovering with more detail the geology of the area and its mining resources (ancient mining area of Pb-Ba de Llofriu- Mont-ras). The first route is the longer of the two (7.6km) and has a 210m altitude difference, whereas the second route is a simpler one, with a length of 2.3km and a flatter terrain (altitude difference of 34m).
For the dissemination of environmental information along the itineraries, this proposal utilizes the notices found already on the routes in combination with a web-site and leaflets designed specifically for this project.
Finally, the environmental impacts caused by the use of the itineraries have been evaluated, and a set of mitigating and preventive measures have been suggested. For instance, a model has been put forward for the evaluation, construction, control and maintenance of the itineraries
cat
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Geomorfologia -- Catalunya -- Montràs
Gestió ambiental -- Catalunya -- Montràs
Ecoturisme -- Catalunya -- Montràs
Geologia -- Catalunya -- Montràs
Geomorphology -- Catalonia -- Montràs
Ecotourism -- Catalunya -- Montràs
Geology -- Catalunya -- Montràs
Environmental management -- Catalunya -- Montràs
Proposta de difusió de la geologia ambiental a l’entorn de la pedrera de Morena (Mont-ras, Baix Empordà)
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128682017-10-10T14:36:37Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Llop Iglesias, Marc
2016-10-18T10:04:46Z
2016-10-18T10:04:46Z
2016-09
http://hdl.handle.net/10256/12868
The purpose of this work is the determination of the consequences produced by an hypothetical accident in the chemical industry over the municipality of Tarragona.
At the beginning, it has been chosen some enterprises that may potentially have the most serious accidents on the sector. The enterprises have been chosen according to the recommendation of “Serveis Territorials de Tarragona”. All the basic data used along this work has been taken from “Serveis Territorials de Tarragona”.
The first data treatment has been about the determination of the extension occupied by the toxic clouds made of gas escapement. This labor has been done by means of a software called ALOHA®, which uses Gaussian models to determinate the different propagations of the gases. These models provide information about the concentration and the situation of the displaced clouds. Same software fix thresholds of concentration that are based on clinical studies realized by EPA (environmental protection agency), these studies make us know about the effects of gases over the population Health. These thresholds are called AEGL.
Once the dispersion behavior is known, the harmful effects to population are determined using the proxy and probit equations. The proxy equation calculates the concentration inside buildings depending on the external concentration. Second equation is called probit and is used to calculate probabilistic results about the affected population. To determinate the effects over the humans, and according to Serveis Territorials de Tarragona, AEGL thresholds were taken as the average concentration. Thanks to those equations it is checked that there are no victims.
The report concludes that there are no victims but the population has been affected. For this reason the last objective is the organization of the urban cores of the municipality. This action pretends to motivate actually and future people to move to zones less dangerous and far away from the toxic clouds ranges. To reach this objective a study about dangerous zones of the municipality has to be done. That analysis has considered the danger of the different zones depending on the number of accidents involved per zones, the number of habitants and the influence of most common winds of the municipality. The sum of all of these factors delineates the safest zones. These zones have been finally consulted on the POUM (municipal urban planning) of Tarragona in order to determinate its viability to guide the urban growth over the safest zones
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Indústria química -- Accidents -- Avaluació del risc
Urbanisme -- Projectes
Indústria química -- Catalunya – Tarragona
Chemical industry – Accidents
Chemical industry -- Accidents -- Risk assessment
Public safety
City planning -- Catalonia -- Tarragona
Estudi de la dispersió de núvols tòxics al municipi de Tarragona i la seva replanificació preventiva
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128692016-10-19T00:00:59Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Maya Chuan, Miguel
2016-10-18T10:19:50Z
2016-10-18T10:19:50Z
2016-09
http://hdl.handle.net/10256/12869
The water quality is very important for the health of ecosystems and to people own, therefore it is important to know it and to direct efforts to preserve it. In this sense, the evaluation of the eco-logical state through using bioindicators is very useful and simple.
The objective of our study was the analysis of the ecological status of seawater using mid-littoral commu-nities from rock substrate as a bioindicator. It has applied the CARLIT methodology (Ballesteros et al., 2007) which is based on mapping of communities living along the coast through the use of geographic in-formation systems (GIS). Specifically, the mapping of communities consists on displaying and identifying communities through the dominant species observed for each coastal stretch of about 50 meters. From here, it indicates a value of environmental sensitivity for each community it depends on its tolerance to pollution, and it is determined the ecological status of the area by applying a rate of Environmental Qua-lity .
The methodology has been applied in 2015 and 2016 in a area of study that includes all the coastal border of Platja d'Aro. Once developed sampling, the results have indicated us that the most abundant communi-ty in the study area has been Cystoseira mediterranea ahead of other as Corallina elongata or Cystoseira com-pressa, especially in far areas from the major population centers, with high hydrodynamics and well lit. Moreover it has been observed that communities of Corallina elongata and green algae are mainly located in restricted areas very near to urban centers or areas of artificialised coast.
In summary, it has been diagnosed that the ecological status of the sampled area is excellent and is close to that observed in unaltered places by human action
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Algues marines -- Catalunya -- Platja d’Aro
Qualitat ambiental
Aigua de mar -- Catalunya -- Platja d’Aro
Seawater -- Catalonia -- Platja d'Aro
Marine algae -- Catalonia -- Platja d’Aro
Environmental quality
Avaluació de la qualitat ambiental del litoral de Platja d’Aro, Girona mitjançant el mostreig de les comunitats d’algues mediolitorals (Metodologia CARLIT)
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128702016-10-19T00:00:59Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Rodríguez Gallego, Albert
2016-10-18T10:28:26Z
2016-10-18T10:28:26Z
2016-06
http://hdl.handle.net/10256/12870
Fluorides and arsenic are part of a group of necessary elements for life, but founded in excess may be harmful for health. At low levels are required to maintain the resistance of teeth and perform the physiological functions of living beings.
The fact of being chemical elements of easy obtainment and required for industries, has nowadays originated that many countries have troubles with the presence of both chemical substances in big drinking water concentrations. This fact, added to the natural existence of these elements in the crust, has caused endemic illnesses in countries such as Tanzania, China or Taiwan, among others.
To try to counteract these health problems, OMS recommended not to exceed 1,5 ppm and 100 ppb in the fluorides and arsenic concentration for water intake.
The project proposal is the research of a titanium dioxide sorbent, named by the commercial classification of Adsorbsia As600, for the decrease of both analytes in waters with concentration higher than the recommended.
The adsorption proves show a high efficiency in the elimination of fluorides, As (III) and As (V). This refers to a quite selective removal technique, with just one problem generated by the interferences of bicarbonate and silicates in the titanium dioxide particles, that consequently decrease the adsorption capacity of fluorides by the sorbent.
The application of this technology allows to extract fluorides and arsenic from natural waters and convert them into suitable for the human intake.
Further investigations could keep optimizing the last researches and improve the obtained registers adapting them to the limit levels of both substances required by law
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Aigües minerals
Aigua -- Fluoració
Arsènic -- Toxicologia
Aigua -- Anàlisi
Water -- Analysis
Arsenic -- Toxicology
Mineral wàters
Water -- Fluoridation
Estudis d’eliminació de fluorurs i arsènic en aigües naturals utilitzant l’adsorbent Adsorbsia As600
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128712016-10-19T00:01:00Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Rovira Alsina, Laura
2016-10-18T10:38:34Z
2016-10-18T10:38:34Z
2016-09
http://hdl.handle.net/10256/12871
The study area is located within the wetlands of Baix Empordà, where the ancient mouth of the River Ter caused the formation of a lagoon system that since 1992 is considered Natural Interest Space. This document focuses on the lagoon Fra Ramon with the aim of characterizing their hydrodynamic spatially and temporarily. From the data collected during a year (November 2014-October 2015) has developed a conceptual mass balance that allows us to evaluate the importance of groundwater flows to maintain the level of the lagoon. So far, only has been contemplated the difference between precipitation (460.09 ± 185.55 m3 / month) and average annual evaporation (792.81 ± 80.00 m3 / month). However, it was found that the volume of the lagoon is also dependent on the inputs and outputs of groundwater as the annual mass balance conducted indicates a gain of 20.10% in volume.
Nutrients data allowed the observation of a clear horizontal stratification in the lagoon for density effect, being the bottom layer a reduction zone that may contain toxic species. The evolution of ions observed was useful in identifying the ammonium and bicarbonate as indicators of the entrances of groundwater in the lagoon, while decreasing the concentration of other ions such as Cl- for effect of dilution.
Mixture, evaporation and reverse models were used to simulate the chemical composition of the lagoon and its evolution. Contrary to what was known, the aquifer represents between 40 and 80% the water of the lagoon and this can evaporate between 50 and 60% in July, whereas the first and second campaigns are not affected by this process. This causes an increase in the concentration of ions with an even higher rate of salinity than in the sea and values of δ18O and δD above 12 and 35‰ respectively. The inverse model and saturation indices have verified the conceptual model and have identified other processes such as calcite precipitation.
The processes described control water fluxes and the salinity of the wetland area and consequently, its ability to preserve the existing biodiversity. This study shows the importance of taking knowledge of hydrochemical processes for any purpose relating to the management and preservation of these environments
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Aigües subterrànies -- Escolament
Aigua -- Salinització
Groundwater flow
Ter (Catalunya : Curs d'aigua) -- Hidrogeologia
Water salinization
Hydrogeology
Estudi de l'evolució hidroquímica i isotòpica de la llacuna de Fra Ramon: la Pletera, Baix Ter – Origen de l’aigua com a base per a la seva gestió
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128722016-10-19T00:01:00Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Samsó Pi, Gerard
2016-10-18T10:46:02Z
2016-10-18T10:46:02Z
2016-06
http://hdl.handle.net/10256/12872
Zinc is an essential trace element for organisms, but an excessive concentration can cause serious toxicity problems affecting their metabolism. It is one of the most widely-spread metals in aquatic ecosystems, and often its concentration exceeds the established thresholds for European and American legislation (59-210 ppb / 30-500 ppb respectively, in function of water hardness).
The total metal concentration present in the aquatic environment doesn’t provide information about its distribution, mobility, biological availability and toxicity. Therefore, the bioavailable metal amount for an organism is proportional to the free or labile metal fraction present in the environment. Nowadays different analytical methods are being developed related to the trace elements speciation, applicable to the free metal quantification, such as supported liquid membranes. In this study, it has been used a system based on a supported liquid membrane of tubular configuration, hollow fiber (HF) for free zinc determination in aquatic environment.
HF device consists in a three-phase system composed of two separate aqueous phases which are in contact with each other through a microporous polypropylene hollow fiber, with a solvent immobilized in its pores. The organic solution containins an extractant which facilitates metal transport through the membrane. Various studies are performed to evaluate Zn2+ transport efficiency of the device with ZnSO4 aqueous solutions. On one hand, it is studied the best composition of the organic and stripping phase, making trials with different concentrations of the extractant D2EHPA 0,5M / 0,25M / 0,1M membrane, and changing stripping phase composition using acidified aqueous solutions HNO310-1M / HNO310-2M + Ca(NO3)2 3,6 ·10-2M / HNO310-4M + Ca(NO3)2 4·10-2M. The best Zn transport efficiencies are obtained with a chemical system composition of 0,1M D2EHPA in the membrane and HNO310-2M + Ca(NO3)2 3,6 ·10-2M in the stripping phase. On the other hand, it is studied the effect of the presence of different ligands (EDTA and citric acid) in the donor phase 30,60 μM Zn, 15 μM EDTA and citric acid 8 μM, where observed that the EDTA influence about the amount free zinc, is more important than citric acid. Finally, it is studied the chemical system selectivity with respect to Zn2+ in the presence of other divalent ions, such as Cu2+. The results show that the system is selective for Zn extraction under the tested conditions.
The device is applied in river water samples, getting low rates of Zn2+ transport due to the presence of humic acids, chlorides, sulfates that can form zinc complexes decreasing its free labile fraction and other metals such as Fe3+ that can also bind to the extractant
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Aigua -- Anàlisi
Aigua -- Composició
Zinc -- Toxicologia -- Aspectes ambientals
Aigua -- Contaminació
Water -- Analysis
Zinc -- Toxicology -- Environmental aspects
Water -- Pollution
Water -- Composition
Disseny d'un sistema de membrana líquida suportada per la determinació de Zn lliure en medi aquós
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/128732017-02-23T10:43:23Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolectaoai:dugi-doc.udg.edu:10256/144302017-10-19T10:19:35Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Anguita Romagós, Sònia
2017-10-08T15:42:42Z
2017-10-08T15:42:42Z
2017-06
http://hdl.handle.net/10256/14430
The following study was carried out to determine the structural variations in fluvial biofilm depending on the depth and type of sediment (particle size) taken from headwaters of two tributaries. Biofilm parameters were analysed from sediment obtained at two different sampling points from Arbúcies and Gualba rivers, two different tributaries of the Tordera river. Both water and sediment samples were obtained through field work, and analysed at a laboratory in accordance to sampling location and sediment depth.
The field samples were taken using a sediment sampler. In each sampling point, samples from surface and depth had been analysed separately, and physicochemical conditions of water had been analysed too. Samples of water had been taken in each point. On the laboratory on the one hand, the general parameters of each point were analysed, those include nutrients, particle size and organic matter analysis, and on the other hand the parameters of biofilm structure through chlorophyll, bacterial density and EPS analysis. Statistical analysis has been performed to see the relation between these parameters.
The physicochemical analysis showed a similarity between the two streams sampled. The results from sediment revealed differences in biofilm structure depending on the depth of sediment, being the highest concentrations of organic matter, chlorophyll, bacterial density and EPS at surface layers. This can be related to the presence of high solar radiation and availability of oxygen and nutrients in the surface compared to deeper sediment layers. Particle size only affects significantly on organic matter concentration that is higher in fine sediment than coarse.
A relation has been found between the parameters composing the biofilm structure. Thanks to a correlation matrix it has been observed that these relations may vary depending on the depth of the sediment. The results revelled that on the surface, algae have a more important role in the EPS matrix formation and in organic matter concentration, whilst at depth the concentration of organic matter is related to bacterial density
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Ecologia microbiana -- Mediterrània, Regió
Sediments fluvials -- Mediterrània, Regió
Ecologia fluvial -- Mediterrània, Regió
Biofilms -- Mediterrània, Regió
Microbial ecology -- Mediterranean Region
River sediments -- Mediterranean Region
Stream ecology -- Mediterranean Region
Biofilms -- Mediterranean Region
Efecte de la granulometria i la profunditat en l’estructura del biofilm microbià en sediments fluvials de dos rius de capçalera
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/144312017-10-19T10:20:32Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Aramburu Munoa, Borja
2017-10-08T15:46:00Z
2017-10-08T15:46:00Z
2017-06
http://hdl.handle.net/10256/14431
The study area is situated in la Pletera, a salt marsh that is located to the north of the mouth of
the river Ter (Torroella de Montrí, Girona). The wetlands and lagoons making up the area form
part of the Area of Natural Interest. The salt marsh’s great ecological interest largely due to the
brackish lagoon system present, where the Fra Ramon (FRA) and Bassa Pi (BPI) lagoons are of
natural origin and the Pletera Nova (G02) artificial, created on the first LIFE restauration
project for the Lower Ter wetlands. The third LIFE project is currently being developed in order
to restore the entire lagoon system. Within the framework of this project, a study of the FRA
and G02 lagoon ecosystem metabolisms was conducted, whose main objectives were (i) to
determine and characterize the Fra Ramon and Pletera Nova lagoon ecosystem metabolisms
for a period of 15 months, and to evaluate other research methods previously proposed in
various studies on the subject, (ii) to evaluate possible similarities and differences in the
metabolic behaviour that lagoons display in relation to one another and towards the
temporary seasonal pattern and, (iii) to determine the influence of the water composition on
the metabolic functioning of the two lagoons.
Throughout the course of the 15-month study, an increase in the production and respiration
variables was noted during the summer months. Similarly, it was in the same months that the
most days were recorded with a situation of total anoxia in the lagoons, which proved to be
related to the wind speed affecting on them. Total production and respiration throughout the
entire monitoring period was higher in G02. Nonetheless, FRA displayed more autotrophic
behaviour, being the only lagoon that acted as a carbon sink. In the multivariable analysis of
the different physicochemical parameters of both lagoons, two main dimensions representing
63.82 % of the explained variance were identified; the first relating to the confinement
conditions, and the second to the nutrient input episodes. Only in the second dimension
significant differences between lagoons found, and a significant correlation was only noted
between the first dimension and the lagoon respiration.
The study concluded with a seasonal pattern of the lagoon respiration and production
variables in to explain the metabolic functioning throughout the cycle. However, other factors
such as nutrients input and the confinement conditions played a secondary role owing to the
system features. The behaviour of the younger lagoon suggests a progression in its maturity,
and the possibility of the appearance of a perturbation influencing the results is taken into
consideration
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Albuferes -- Ter (Catalunya : Curs d'aigua)
Lagoons -- Ter (Catalonia : river)
Metabolisme ecosistèmic de la llacuna natural Fra Ramon i la restaurada G02 a la Pletera
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/144322020-07-22T06:26:44Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Canaleta Garcia, Guillem
2017-10-08T15:51:18Z
2017-10-08T15:51:18Z
2017-06
http://hdl.handle.net/10256/14432
Cork oak (Quercus suber) is a highly appreciated tree in Mediterranean forests for its values: economic and environmental. Cork extraction is the main activity due to the economic value of the cork. For this reason, this project has the aim to promote the sustainable production of cork. The first objective has been a comparison between two silvicultural treatments. The silvicultural treatments tested were: total and partial clearing combined with a selective thinnig of low intensity, to consider advantages and disadvantages of each scenario. Knowing pros and contras, we wanted to make a general management proposal depending on the target wanted for the cork oak forest. The second aim, related with the first one, has been evaluating the utilization of a technic called terrestrial photogrammetry or 3D photogrammetry, to reduce costs and gather data as diameter or cork caliper faster. Both aims are related because this project tries to search a reduction of costs in data collection and an increment of revenues producing more cork. Parameters studied to compare both treatments are tree size, cork production, biodiversity, fire, work, costs and young individuals. It has been possible to observe that total clearing is better in fire and young individuals, while partial clearing wins in all the other features. About terrestrial photogrammetry, it consists in taking photos of a plot to process them later and create a 3D model. From this model, it is possible to collect data using a computer. This allows a reduction of costs and permits a faster data obtaining. It has been observed that in dense forests it is not possible to use this technology due to a lack of reference points. However, in forest with low density, the point cloud obtained respects the real shape and proportions, so it is possible to collect data from it. For that reason, in low density forests, we propose a partial clearing using terrestrial photogrammetry to gather data, because we would have a higher economic yield without compromising forest health
eng
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Fotogrametria
Boscos -- Gestió
Surera
Suro
Photogrammetry
Forest management
Cork-tree
Cork
Evaluation of two silvicultural treatments and terrestrial photogrammetry in Quercus suber stands, North-East Spain
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/144332017-10-19T10:22:03Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Cruz Guardia, Yeray
2017-10-08T15:55:48Z
2017-10-08T15:55:48Z
2017-06
http://hdl.handle.net/10256/14433
The biogas generated during anaerobic digestion in wastewater treatment plants and landfills is considered as a resource of renewable energy. Whereas its use not only contributes to reducing greenhouse gas emissions but also obtaining heat and electricity, biogas contains trace undesired compounds such as H2S, volatile organic compounds and siloxanes among others. Volatile methyl siloxanes present in biogas cause the formation of silicate deposits during combustion affecting the efficiency of energy recovery systems.
The most widespread technology commercially available for siloxanes removal is adsorption onto porous materials, though their regeneration or replacement once exhausted is energy-consuming and expensive. On the contrary, biodegradation technologies may (i) reduce investment and operating costs, (ii) increment treatment capacities and (iii) require low energy and chemicals. It needs to be highlighted that siloxanes challenge biotechnologies due to their low solubility into water, which hinders their gas-liquid mass transfer and subsequently the liquid-biofilm transfer.
Within the present work, an aerobic biotrickling filter was operated for 56 days for the treatment of an air stream contaminated with octamethylcyclotetrasiloxane. At the beginning, D4 stripping from the laboratory-grown inoculum was observed and confirmed by cutting the siloxane entrance of D4. Even at high gas flows, D4 concentration of around 10 mg m-3 were observed. After inoculating with activated sludge from a wastewater treatment plant, the performance of the reactor showed 10% removal efficiencies at an empty bed contact time of 10 min. Moreover, decreasing the medium recirculation flow down to 15 mL min-1, higher REs up to 21% were observed. Although being a pretty high gas residence time, low removal efficiencies were obtained due to the low solubility of D4 which leads to a low mass transfer to the liquid phase and consequently to the biomass
eng
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Compostos orgànics volàtils -- Absorció i adsorció
Biogàs
Compostos organosilícics -- Absorció i adsorció
Biogas
Organosilicon compounds -- Absorption and adsorption
Volatile organic compounds -- Absorption and adsorption
Start-up of a lab-scale biotrickling filter for octamethylcyclotetrasiloxane (D4) removal from biogas
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/144342017-11-14T15:00:34Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Frau Caamaño, Miquel
2017-10-08T16:00:02Z
2017-10-08T16:00:02Z
2017-06
http://hdl.handle.net/10256/14434
Nanoparticles’ field has experienced an exponential growth in last years due to the need of nanotechnology in everyday items, which are further miniaturized day by day. This high consumption of nanoparticles has risen a concern about their potential impact on the environment and life, very few studies have been portrayed over these possible harms. Some very spreadly used nanoparticles, specially in medicine, are silver nanoparticles, which are used as antimicrobials in burnt patients.
The objective of the present study is to analyze the behaviour of silver nanoparticles in the environment, in plants (lettuce) to be more precise, to determine the amount of nanoparticles absorbed by the plant and the amount of it displaced by the roots to the leafs. It’s also important to discover the factors that increase the nanoparticles absorbed by the roots and the ones that increase its displacement to the leafs. This is why one of the objectives established in this study is to improve the results obtained in previous ones, modifying different procedures. To accomplish these objectives several experiments have been performed with silver nanoparticle fortified crops, which were digested through two different systems depending on the experiment, enzymatic digestion and complete digestion. Once the samples were digested, they were analyzed with an ICP-OES and an ICP-MS in order to quantify the amount of silver captured by them. The presence of ionic silver and nanoparticles was also determined with the ICP-MS’ single particle mode.
Once analyzed all samples, the results have shown that some of the changes applied to these have offered better values than the ones obtained in previous studies, some more effectives than others. The modification that has offered the best results has been magnetic stirring. It has also been possible to observe how plants absorb silver and displace it to its leafs. Furthermore, the presence of silver in the roots has been confirmed, but the presence of nanoparticles on the leafs has not been determined yet. Finally, more changes and experiments should be performed in order to improve the standard deviations of the results, as well as to manage some way of filtering the samples without losing most of the silver nanoparticles (AgNPs) to determine its presence in leafs through SP-ICP-MS technique
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Materials nanoestructurats
Nanopartícules
Plata -- Absorció i adsorció
Nanostructured materials
Nanoparticles
Silver -- Absorption and adsorption
Interacció de nanopartícules metàl.liques de plata amb el medi ambient: anàlisi i caracterització mitjançant tècniques d'espectroscòpia atòmica (IPC-OES i ICP-MS)
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/144352020-02-25T15:07:07Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Martinez Calvache, Albert
2017-10-08T16:53:40Z
2017-10-08T16:53:40Z
2017-06
http://hdl.handle.net/10256/14435
Siloxanes are silicon based compounds that are present in biogas. The need for new and better ways to obtain renewable energy is incrementing. The biogas produced in landfills and wastewater treatment plants can be used as a renewable energy source, however in all of the possible utilizations the siloxane removal is necessary. The costs of siloxane removal nowadays are high and not a cost effective solution has come yet. The biological removal of this compounds is a possibility currently under research, but the low solubility in water that siloxanes present is a problem. The investigation in order to make the siloxanes more bioavailable is necessary, and this study goes in that direction.
A total of 4 commercial activated carbons (ACs) have been tested for the absorption and partition of the octamethylcyclotrisiloxane (D4) in batch experiments using different humidity conditions. The ACs tested present different physical and chemical properties, given by their different activation processes: ones were activated with steam and others with H3PO4. Siloxane partition into gas-water-AC phases was studied. The end goal was to prove the capacity of the ACs to catalyze the ring-opening of D4 to transform it into more soluble compounds, which may be more accessible to microorganisms to remove it biologically.
All the ACs tested adsorbed the D4 completely in dry conditions. The results showed that the recovery of D4 by hexane extraction from the AC matrix was low due to the potential transformation of the D4 into other compounds either not extractable or nor detectable by the analytical methods used. When the conditions of humidity were higher, the results showed that the ACs adsorbed less D4: a little amount remained in the gas phase.
A chemically AC was selected because it was the best performing AC at D4 removal and transformation. Extraction was made with a polar solvent, so the presence of silanediols could be detected. Silanediols are water-soluble by-products from siloxane hydrolisis, thus making the formation of silanediols the path to follow in future biological removal of siloxanes technologies
eng
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Compostos orgànics volàtils -- Absorció i adsorció
Biogàs
Compostos organosilícics -- Absorció i adsorció
Biogas
Organosilicon compounds -- Absorption and adsorption
Volatile organic compounds -- Absorption and adsorption
Carbó activat
Carbon, Activated
Siloxane transformation reactions by means of activated carbon towards biological availability
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/144362017-11-14T14:59:02Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Maschio Gastelaars, Dante
2017-10-08T17:06:38Z
2017-10-08T17:06:38Z
2017-06
http://hdl.handle.net/10256/14436
Bioremediation is an efficient technique to restore areas which have been contaminated by large oil spills.
This method bases on the ability of microorganisms to oxidize the main oil compounds; hydrocarbons.
While it is not a definitive solution, bioremediation allows us to some extent find an affordable balance
between human beings and the environment.
The goal of this study is to determine which bioremediation strategies could be applied in Catalonia in the hypothetical case of a large oil spill. The methodology of this research work consists of a primary research of literature sources based on general aspects of bioremediation and also the strategies applied in real oil spills.
The effectiveness of bioremediation depends both on abiotic and biotic factors and its results differ in a maritime andor soil environments. Biotic factors are made up by the presence of hydrocarbon degrading microorganisms. On the other hand, abiotic factors are constituted, by environmental parameters regarding bioavailability and oxidation of pollutants, temperature, pH and redox potential. The main challenge to bioremediation in oceans and seas is the dynamics of the water. In contrast, in soil environments, the matrix heterogeneity and porosity are the most prevalent challenges.
The efficacy of bioremediation is dependent upon the chemical composition of the oil. In the case of the Gulf of Mexico accident, with a lighter oil, the bioremediation rate was higher than in the case of heavier oils such as Exxon Valdez and Prestige. Weather conditions also affects bioremediation and destination of pollutants. Through supporting case studies, this paper will conclude that bioaugmentation is not a useful strategy and less frequent, whereas, biostimulation from fertilizers and dispersants can significantly improve bioremediation of oil.
The characteristics of the Mediterranean climate and sea suggest that the implementation of
bioremediation would be quick and efficient in the case of an oil spill in Catalonia. The strategy would be based on biostimulation with dispersants and fertilizers, discarding bioaugmentation. Finally, the lowscale application of ex situ bioremediation techniques and the lack of strategies that address the real needs of large oil spills would require the drafting of a proactive procedure proposal able to manage an oil pollution accident in Catalonia
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Bioremediació
Vessaments de petroli -- Aspectes ambientals -- Catalunya
Bioremediation
Oil spills -- Environmental aspects -- Catalonia
Estratègies de bioremediació en vessaments massius de petroli: aplicació en un cas hipotètic a Catalunya
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/144372017-10-19T10:25:15Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Ros Roldan, Guillem
2017-10-08T17:10:35Z
2017-10-08T17:10:35Z
2017-06
http://hdl.handle.net/10256/14437
The study area is located within the wetlands of the Baix Empordà, where the old mouth of the River Ter, has led to the formation of a lagoon system that from 1992 is considered an Area of Natural Interest (EIN). The present documented, focuses on the lagoon of Fra Ramon and L04, with the objective of characterizing the seasonal variations in the salinity of the soil. From the data collected seasonally during the period between February 2016 and April 2017, have developed a study of the levels of resistivity electrical resistivity tomography to determine the levels of soil salinity.
The ERT (Electrical Resistivity Tomography) has served to create a 2-D model with the distribution of resistivity values in depth, allowing to study the variations of the results among the different campaigns, "Time-lapse", either in % of variation between campaigns, % accumulated or median values of resistivity in depth. These parameters have been related to external data such as the water levels of the lagoons, records of surveys and excavations, and hydro-meteorological and maritime values to determine the temporal variation of salinity and check what are the values that affect in these variations.
The resistivity data observed, both by data collected externally and the calculated data in the laboratory, show a clear variation linked on weather conditions depending on the season of the year, having regard to the higher values of salinity in times with the presence of precipitation and an increase in the level of the lagoons and the sea. These conditions would increase the saturation of the material on the top layer of the profile. As has also been observed, there is a relationship between soil moisture and salinity, confirming the reason that soil resistivity increases in time with a high contribution of water in the area, considering the balance between fresh and saline water at each particular time. While in the absence of water and drying of the top layer of the profile would be a decrease in the levels of soil resistivity.
On the other band resistivity values in lower layers are related to the intrusion of sea water. With an increase of the effect of the sea water, the levels of resistivity lower and therefore increase the salinity values. On the other band, high resistivity values, will be related to the presence of fresh water
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Albuferes -- Ter (Catalunya : Curs d'aigua)
Salinitat
Lagoons -- Ter (Catalonia : river)
Salinity
Variacions estacionals en la salinitat del subsòl a les basses litorals de nova creació a la Pletera
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/144382017-10-19T10:26:30Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Solà Serrallonga, Arola
2017-10-08T17:23:18Z
2017-10-08T17:23:18Z
2017-06
http://hdl.handle.net/10256/14438
For the last several years, there has been a strong incentive to foster environmental awareness in all spheres of society, including universities, considered a key element in promoting environmental sustainability. The Catalan university system has promoted such principles by incorporating sustainability in the different strategic plans of its institutions, creating internal bodies to promote it and kickstarting several programs and activities. Catalan universities are certainly implementing different measures to become more sustainable; however, it has been difficult to compare the progress they have made so far, since each university has its own directives and has followed different paths. There is a lack of a common methodology to promote environmental sustainability, and the efforts made by each university are varied. The present work contains a comprehensive research of the different initiatives, programs and activities performed by each university within the Catalan system to achieve environmental sustainability. They are classified into six categories, given the fact that they all share the same core objective. After evaluating each university, we have produced a series of tables and report cards to compare and contrast the work they have carried out so far. This study hopes to promote inter-university collaboration to achieve an environmentally sustainable university system. We conclude that the Catalan university system is following the right steps towards achieving sustainability, but there is still a long road ahead
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Universitats -- Aspectes ambientals -- Catalunya
Universities and colleges -- Environmental aspects -- Catalonia
Diagnòstic comparatiu sobre la sostenibilitat al sistema universitari català
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/144392020-07-22T06:26:26Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Tarradas Mascarreras, Laia
2017-10-08T17:43:15Z
2017-10-08T17:43:15Z
2017-06
http://hdl.handle.net/10256/14439
The Coll de Te beech forest, located within the Montseny Nature Reserve, is an example of a forest in recovery after years of exploitation. In response to the proposed hypothesis of this forest needing to be characterised as an old-growth forest, its ecological resilience has consequently been analysed through a combination of fieldwork and bibliographic research, by analysing the data obtained from the monitoring study initiated in 2006 with the birth of the “Creació de Reserves Forestals”. We have been able to conclude that, within this protection period, the forest has evolved to a certain degree of maturity, but with nefarious consequences due to the amount of felling that was performed, which resulted in a homogenous age group among tree species and a dominance of certain species, resulting in the extinction of various other tree species, a tendency to the ageing of the forest structure with absence of regeneration and a stability of the surrounding area supported by the results of the analysis of their biological cycle, which show a decreased radial growth with time and a 3 year periodicity in fruit production. In order to recover the necessary heterogeneity and prevent its transformation into a completely old forest the custody agreements in place that intend to protect it for 20 years have been deemed insufficient, therefore, a forestry management measure has been proposed that potentiates the diversity of tree sizes and the biodiversity of the ecosystem
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Boscos -- Gestió -- Catalunya
Faigs -- Catalunya
Forest management -- Catalonia
Beech -- Catalonia
Dinàmica i evolució de la fageda de Coll de Te
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/146492018-04-04T08:09:49Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Galizia Amoraga, Albert
2017-11-29T10:51:16Z
2017-11-29T10:51:16Z
2017-09
http://hdl.handle.net/10256/14649
Water is a precious and necessary good for humans. We make great use of it be it for
industry or urban use. In consequence its quality is altered and generates what we
denominate waste waters. This water has to be treated to prevent negative impact on
the environment. To avoid this there are waste water treatments. Conventional
treatments in waste water treatment plants are composed of physic-chemical and
biological treatments. But those water treatment plants present limitations that
difficult improvement of the process.
This limitations can be balanced out by integrating other advanced technologies of
waste water treatment that will improve the treatment and generate better quality
water diminishing the impact on the environment. One of those systems is called
membrane bioreactor (MBR). This process generates much better water quality but
has two big inconvenient: the operational cost and the membrane fouling.
The membrane fouling is due to particle accumulation on the surface, negatively
affecting water filtration. Fouling is detected by the increase in trans-membrane (TMP)
pressure. In consequence there is an increment on the energetic cost and when
accumulated it can damage the membrane.
There exist different measures to help reduce fouling. Systems like the application of
airing to create turbulence and detach fouling. Also periodical back wash process to
release obstructed pores or chemical washes to recover filter capacity even though it
reduces the membrane useful life.
All these measures imply direct actions on the membranes. What we study is the
option to apply an external peptic treatment that coats the membrane surface, able to
prevent bio-fouling from membranes. With this treatment we could reduce back wash
frequency, airing flow or even chemical washes. Therefore we can reduce operational
costs from this technology increasing its profitability.
Comparison between treated membranes and non-treated ones indicates that we can
increase its permeability in low fluxes due to coating
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Reactors de membrana
Aigües residuals -- Depuració
Aigües residuals -- Plantes de tractament
Sewage -- Purification
Sewage disposal plants
Membrane reactors
Avaluació del tractament extern per reduir l’embrutiment biològic en membranes polimèriques submergides
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/146502018-04-04T08:08:28Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Nadal Agulló, Laia
2017-11-29T11:23:19Z
2017-11-29T11:23:19Z
2017-09
http://hdl.handle.net/10256/14650
The Mediterranean barb is a species of the family of cypresses that has been affected by current adverse environmental conditions and by invasive species pressures until it has been classified as a vulnerable species (VU). Its population trend has made it sensitive to changes in the flow patterns, water extraction and habitat alterations. The objective of this work is to give a new focus to the populations that live in five effluents of the Ter basin. The technique used was electric fishing and a subsequent reading of the ages through the scales of each fish caught in the different sections, as well as carrying out a series of statistical analyzes (ALK model) and, the Robson- Chapman and the condition of Fulton in order to estimate the age structure, mortality and condition of the species. The length-weight ratio of the catches has also been estimated in order to provide a database for future biomass studies of this species. In the results obtained it has been observed that it is a really species that is vulnerable to external affections and that its growth in these streams may have been negatively affected. The general situation in which they are found is optimal, but with a clear difference between sections that could have their origin in artificial hydrological changes. Unfavorable biological conditions and competition between introduced species may also have caused their endemism in these rivers to be more regressive. The results should be reaffirmed with the monitoring of the study and the increase in catches in each section to be able to establish the current state of the species and above all, in order to give a more optimal overview of the conditions under which this species lives and grows in the stretches sampled in the Ter basin
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Ciprínids -- Catalunya -- Ter (Curs d’aigua)|
Biologia de poblacions -- Catalunya -- Ter (Curs d’aigua)
Cyprinidae -- Catalonia -- Ter (River)
Population biology -- Catalonia -- Ter (River)
Determinació de l’edat del barb de muntanya (Barbus meridionalis) a diverses poblacions de la conca del riu Ter
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/146522018-04-04T08:09:29Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Rosell Manich, Isabel
2017-11-29T12:12:16Z
2017-11-29T12:12:16Z
2017-09
http://hdl.handle.net/10256/14652
“Study of springs as natural and cultural heritage: applied to Sant Hilari Sacalm” is a study carried out to evaluate some of the numerous springs within the municipality of Sant Hilari Sacalm in accordance to discharge, physicochemical, hidrogelogical, social, and cultural parameters these may present. During variuous field work campaigns, 26 locations were sampled and where further studied at two different laboratories concurrently.
Specifically designed sheets and data collecting allowed sampling on site, recollecting information regarding location and access to the springs, hidrogeological and physicochemical parameters and aquifers. Springs were coded in order to permit an expansion of the project, adjusting them to studies around Catalunya and/or elsewhere.
Results show that meteorology could have had an impact on sampling, nonetheless, 4 groups and 6 typologies were found in accordance to their hidrogeology: springs on crystallinic materials including fracture springs, springs on altered material, springs related to floodbanks, springs in regional faults and springs on quaternary sediment which correspond to alluvial formations. The majority of these waters are human-consumption ready, except for sparkling springs given their high fluoride content.
Hidrochemical classification reveals that springs can be divided into sulfated, chlorinated and bicarbonated wateres these being continental waters in contact with short granitic medium thus have a poor chemical evolution.
Finally, an evaluation was carried out, with the intention of determining which springs have the richest heritage. La Font de Sant Josep (SHS056), la Font de Santa Escolàstica (SHS058) i la Font de Santa Teresa (SHS059), les fonts picants proved to be richest in such aspect
cat
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivs 3.0 Spain
Fonts -- Catalunya -- Sant Hilari Sacalm
Hidrogeologia -- Catalunya -- Sant Hilari Sacalm
Fountains -- Catalonia -- Sant Hilari Sacalm
Hydrogeology -- Catalonia -- Sant Hilari Sacalm
Estudi de les fonts com a patrimoni natural i cultural: aplicació a Sant Hilari Sacalm
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164522019-04-01T10:35:58Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Amer Orfila, Jordi
2019-04-01T10:35:58Z
2019-04-01T10:35:58Z
2018-06
http://hdl.handle.net/10256/16452
Swimming capacity is a vital function for aquatic organisms because it is essential for obtaining food, reproduction and survival. This is estimated from the critical swimming speed (Ucrit), the maximum metabolic rate (MMR) and the standard metabolic rate (SMR), which can be influenced by the total length (TL), the total weight (BW) and the morphology of the species. These parameters have been analyzed by six species, three cyprinids (Alburnus alburnus, Phoxinus bigerri and Rutilus rutilus), a centrurid (Lepomis gibbosus), and two cyprinodontides (Aphanius iberus and Gambusia holbrooki). The measurements of critical swimming speed (Ucrit), the maximum metabolic rate (MMR) and the standard metabolic rate (SMR) have been obtained experimentally in the laboratory through swimming tunnels coupled to a respirometer. For the morphological measures, we have used the "tpsDig232" program, which can measure areas and perimeters from the photographs of the specimens. The statistical analysis consisted in the application of Covariance Analysis (ANCOVA) between the physiological and morphological variables with the total length and the total weight of the individuals, analysis of the Variance (ANOVA) when there was no linear regression between the variables physiological and morphological factors with total length and total weight and, also, an analysis of correlations between the physiological and morphological variables. Finally, we have used the Analysis of Main Components (PCA) for all the species and the variables studied. The results obtained showed an increase in Ucrit as the total length increases and an inversely proportional relationship between Ucrit and MMR. MMR and SMR have been found to be related to total weight so that individuals with higher weight present higher oxygen (mg O2/h) intake. High values of Fineness ratio, Aspect ratio, Propulsive ratio and Caudal peduncle factor are determinants of hydrodynamic morphology of species, and therefore they were related with the Ucrit, the MMR and the SMR. High values of Muscle ratio have been observed in non-migratory species which showed low Ucrit. Furthermore, high values of Aspect ratio have been observed in migratory species which showed a high Ucrit. The life style of the species and its morphology seemed to play a key role in determining the swimming capacity (Ucrit) and metabolic rates (MMR and SMR) of the species studied
cat
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Alburnus alburnus
Phoxinus bigerri
Rutilus rutilus
Lepomis gibbosus
Aphanius iberus
Gambusia holbrooki
Ciprínids -- Morfologia
Centràrquids -- Morfologia
Ciprinodòntids -- Morfologia
Cyprinidae -- Morphology
Centrarchidae -- Morphology
Cyprinodontidae -- Morphology
Comparació de la capacitat crítica de natació i la morfologia de sis espècies de peixos d’aigües continentals
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164532019-04-01T10:41:50Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Clarà Cornella, Marina
2019-04-01T10:41:50Z
2019-04-01T10:41:50Z
2018-06
http://hdl.handle.net/10256/16453
In this study, an analysis of 105 sources distributed in the municipality of Sant Hilari Sacalm is carried out, in the region of La Selva. Between February 1 and May 2, 2018, 16 field campaigns have been conducted to locate and sample these springs. In order to analyse them first, they are classified according to their hydrogeological origin, their flow, the chemical composition of their waters and the predominant soil uses in their drainage basins. Based on these classifications, we proceed to analyse the relationships between them. To do this, first the springs must be sampled to measure their conductivity, pH, temperature, redox potential, and dissolved oxygen concentration. Also, to analyse the samples in the laboratory and in this way be able to determine the concentrations of some ions and compounds in the water.
Next, we must have determined the drainage basins of the springs, to be able to analyse the relation of its surface with the discharge of the springs. Subsequently, the uses of the soil in each drainage basin are determined, to calculate the percentage of each in the total surface area of the basin. For later analyses, the uses of the predominant soil in the drainage basin of each source are used, to be able to verify the effects that these can cause in the chemistry of the water.
Sant Hilari Sacalm is located in the massif of the Guilleries, which has a geological composition, mainly of silicic type, that influences the chemical composition of the springs of water from the reactions that occur between groundwater and rocks for which it circulates. Being an area formed mostly by a slightly varied geology, there are not high chemical variations between the springs analysed, except for spicy springs. These three springs have specific chemical characteristics, which classify them in medicinal springs. These medicinal properties have been an important aspect in the history of the township, being a tourist attraction in the last century. At the moment, the springs are still an important part of the township, thanks to the bottlers, which are one of the most important economic sectors of the town
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Fonts -- Catalunya -- Sant Hilari Sacalm
Hidrogeologia -- Catalunya -- Sant Hilari Sacalm
Fountains -- Catalonia -- Sant Hilari Sacalm
Hydrogeology -- Catalonia -- Sant Hilari Sacalm
Estudi hidrogeològic de les fonts de Sant Hilari Sacalm com a base per a la seva valoració patrimonial
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164542019-04-01T10:51:51Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Climent Casals, Marina
2019-04-01T10:50:12Z
2019-04-01T10:50:12Z
2018-06
http://hdl.handle.net/10256/16454
The beach of Sant Pere Pescador is in the Alt Empordà region and is the longest unit in the Gulf of Roses. As it happens to the rest of the Catalan coast, it is a part of the territory from which humans extract a great benefit. In this beach dominates the tourist use, recreational, nautical activities, and sports.
This final degree project looks at the effects of sedimentary dynamics, anthropic activity and the rise in sea level. In order to do so, the current state of the beach is determined by aerial photographs and topographic profiles, the characteristics of the sediment by granulometric analysis by sieving, the vegetation cover and the state of the dune system are evaluated, the evolution of the coastline and the sedimentary balance. The areas of the beach with different characteristics are also individualized between the north sector, the central sector, and the south sector.
It is observed how the adjacent areas on the beach have been anthropized, for crops and campsites, and how natural morphologies are minority. In addition, most dune forms are under training. On the other hand, the characteristics of the beach have a gradient from the northern sector to the southern sector due to: the wind incidence, the contribution of sediments and the evolutionary rate of the coastline. The central sector is an interface zone.
Regarding the sedimentary dynamics, this has been modified anthropically by the construction of the Darnius-Boadella reservoir in the Muga and by the modification of the meanders of the Fluvià river. In addition, the sedimentary balance is negative and the volume of sediments available to the beach has been reduced, increasing its vulnerability for the future. In spite of this, for now, the vulnerability of the dunar system is medium-low.
As for the coastline, it has regressed in recent decades but only 13.21% of the decline it has suffered is due to the rise in sea level. The other 86.79% is the cause of coastal drift and sedimentary dynamics modified by anthropic activity.
Therefore, anthropic activity is the one that generates the greatest effects on the beach and has modified the sedimentary dynamics. On the other hand, the rise in sea level, that is the consequence of climate change produced by humans, affects the beach to a lesser extent
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Home -- Influència sobre la natura -- Catalunya -- Roses, Golf de
Platges -- Aspectes ambientals -- Catalunya -- Roses, Golf de
Nivell del mar -- Catalunya -- Roses, Golf de
Sea level -- Catalonia -- Roses, Gulf of
Nature -- Effect of human beings on -- Catalonia -- Roses, Gulf of
Beaches -- Environmental aspects -- Catalonia -- Roses, Gulf of
Efectes de la dinàmica sedimentària, l’activitat antròpica i l’ascens del nivell de mar a la platja de Sant Pere Pescador
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164562020-01-28T15:48:01Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
González Torà, Víctor
2019-04-01T11:00:23Z
2019-04-01T11:00:23Z
2018-06
http://hdl.handle.net/10256/16456
Coastal wetlands are one of the most affected ecosystems by human activity, with a high degradation of their ecological status and, the few remaining are surrounded by buildings. It is one of the richest and most productive ecosystems in the world that maintains a certain balance with the entrances of the sea. The studied area is the Pletera, a wetland system located in the Baix Empordà marsh, close to the mouth of the Ter river, which has recently been de-urbanized thanks to the Life Pletera project, which aims to recover the complete ecological functionality of this zone. Until now, the hypothesis has always been that these loopholes depend only on surface inlets of the sea and precipitation, leaving aside the role of the aquifer. In this work, the hydrological regime and the salinity of three lagoons of La Pletera (Life A, B and C) were analyzed during the period between December 2014 and September 2017. The General Lake Model program, with open source software developed by Hipsey et al., (2014), is a one-dimensional model of equilibrium and stratification of a body of water in line with experimental and meteorological data. Through this program, we have determined for each lagoon, the temporary evolution of the salinity and the underground inflows and outflows, and to elaborate a balance of mass that has allowed to calculate the rates of evaporation and other parameters that affect the lagoons. Moreover, thanks to the meteorological data, the oscillations of the levels of each lagoon have been studied with the sea level and sea storms, among others. The results show that lagoons depend on the underground inputs to maintain their level during the driest and warmest period of the year and its salinity is marked by evaporation, underground inputs and surface sea inlets. In addition, it has been determined that the evaporation of each lagoon depends on its morphology. Based on these results, the present study aims to be another proof of the importance of hydraulic connectivity between the marshes and their underlying aquifers and that requires the commitment of all to preserve it
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Albuferes -- Catalunya -- Ter (Curs d'aigua
Salinitat -- Catalunya -- Ter (Curs d'aigua)
Hidrologia -- Catalunya -- Ter (Curs d'aigua)
Lagoons -- Catalonia --Ter (River)
Salinity -- Catalonia --Ter (River)
Hydrology -- Catalonia --Ter (River)
Aplicació del model GLM (General Lake Model) per a l'estudi del règim hidrològic de les llacunes litorals de La Pletera
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164612019-04-02T07:25:12Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Gutiérrez Oliveres, Aleix
2019-04-02T07:25:12Z
2019-04-02T07:25:12Z
2018-06
http://hdl.handle.net/10256/16461
Nowadays, with the energetic position that is presented to us, many countries are
starting to look for solutions to try to reverse the situation. Thus, there are many making
strong invests for the renewable resources, particularly the wind power. This is the most
productive resource from the other well-known sustainable resources (solar power,
biomass and wave power). But it generates impacts during the pre and post facilities
construction. Mainly, two impacts are generated in the environment: first, a visual
landscape impact and second, an impact in birds. For these ones, especially raptors, it is
generated a loss of habitat, space use modification, and bird fatalities.
To alleviate the fatalities impact, in 2008 Junta de Andalucía carried out the protocol
design of environmental mitigation measures. It contains: selective stopping of turbines
when the birds are watched around the wind farms, carrion coverage to avoid risk
situations within the wind farm and daily search of corpses. The objective of this study
is to know if these measures are effective for the soaring birds group. It is also analyzed
if the mitigation measures are more efficient to certain species. Due to its flight
morphology and physical conditions, this group is especially vulnerable to collision with
turbines. The study area has 21 wind farms and 267 turbines with different models.
Finally, it points out that the mitigation measures have not the same efficiency in all the
species of the soaring birds group. To enhance this argument, in certain species such as
Griffon vulture (Gyps fulvus) and short-toed snake eagle (Circaetus gallicus) mitigation
measures efficiency has proved. In the other hand, other species such as white stork
(Ciconia Ciconia) and black kite (Milvus migrans) mitigation measures efficiency has not
been able to prove. Therefore, the mortality rates in this group are significantly
different. The collision rates are differing from one species to another for some different
reasons: density population, space use within the soaring birds group and the flight
behavior. More factors that affect the fatalities rates are the sites where the wind farms
are located and the sites where the turbines are located inside the same wind farm
spa
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Aerogeneradors -- Aspectes ambientals -- Andalusia -- Tarifa
Parcs eòlics -- Andalusia -- Tarifa
Rapinyaires -- Andalusia -- Tarifa
Cigonyes -- Andalusia -- Tarifa
Medi ambient -- Anàlisi d'impacte -- Andalusia -- Tarifa
Wind turbines -- Environmental aspects -- Andalusia -- Tarifa
Birds of prey -- Andalusia -- Tarifa
Wind power plants -- Andalusia -- Tarifa
Storks -- Andalusia -- Tarifa
Environmental impact analysis -- Andalusia -- Tarifa
Evaluación de las medidas de mitigación ambiental en los parques eólicos de la localidad de Tarifa (Estrecho de Gibraltar)
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164622019-04-02T07:30:19Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Martín Pérez, Angel Luis
2019-04-02T07:30:19Z
2019-04-02T07:30:19Z
2018-06
http://hdl.handle.net/10256/16462
This work has been done with the aim of analysing the flows of matter and energy in a restaurant and see which are the most important factors in the management. It should be noted that this study is the first step towards a more detailed future study since it is based on approximate data; that’s because it has been intended to compile the maximum information without compromising the normal functioning of the studied establishment. This topic has been chosen due to the alarming current situation in the waste generation: approximately 262.471 tonnes of waste food are generated annually, and 3.73 million tonnes of urban waste were produced throughout Catalonia. In addition, it should be considered that in this region the predominant sector is the services ones, with many restaurants that, if they are not managed in a proper way, can produce many wastes. All this adds to the fact that no such study was found in Spain in terms of global restaurant management.
All this work has been supported on the project within the Horizon 2020 program called UrbanWINS. This has provided the first methodology applied to the study: the DPSIR model, which has allowed to identify all the factors (both social and environmental) that affect the restaurant.
With the "Material Flow Analysis", the inputs and outputs of matter and energy to the system has been measured. Thanks to this, it has been estimated that the establishment generates a carbon footprint of 181,4 tonnes of CO2 per year and requires a water footprint of 15.043.297,32 litters of water to produce all the food required by the restaurant. On the other hand, it has also been estimated that each customer, when consuming in the restaurant consumes 33,3 L of water, 0.3 dm3 of gas, 3,91 kWh of electricity, 65,47 g of used oils and 404 g of organic waste.
Finally, one of the most important factors that link the operation of the restaurant with the environment was studied: the sustainability certificates; where many factors have been considered. Despite this, there are imbalances with the points to reach the minimum levels of sustainability, without considering an average of all the required factors.
All these data are of great importance when it comes to future management. This work has allowed us to quantify values that are not normally considered in the management of a restaurant
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Residus -- Eliminació -- Catalunya -- Manresa
Restaurants -- Residus -- Eliminació -- Catalunya -- Manresa
Restaurants -- Refuse and refuse disposal -- Catalonia -- Manresa
Refuse and refuse disposal -- Catalunya -- Manresa
Anàlisi del flux de matèria i energia en un restaurant: identificació de factors determinants a l’hora de la gestió i certificació
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164632019-04-02T14:43:15Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Nemesio Quer, Àngela
2019-04-02T07:50:43Z
2019-04-02T07:50:43Z
2018-06
http://hdl.handle.net/10256/16463
On the 21st century, the hydrological cycle will bring strong quantitative variations at the horizon. Therefore, these variations will affected by future forecasts in a seasonal level due to the climate change. Given the dependence on water supply in the Barcelona Metropolitan Area, in response to the global change in its Ter, Llobregat and Besós basins, this work has been carried out with the aim of seasonally estimating the real behaviour of the water balance, and to contribute to the sustainable development of its resources.
To consider the effect of temperature on water in the horizons of 2021 and 2050, the water balance of several subbasins in the -Ter, Llobregat and Besós catchements- has been estimated at seasonal level. The current actual evapotranspiration (ETr) has been calculated using Zhang et al. (2001) equation, taking into account the type of vegetation cover and the values of seasonal precipitation (P) and potential evapotranspiration (ET0). Using the water balance of each sub-basin and the ETr values, the water balance for 2021 and 2050 is then recalculated. Finally, the current and future R / P ratios are calculated to estimate the availability of water resources.
The results show significant reductions in the availability of water resources, especially by 2050, which are indicated by the R / P ratios. All three basins will be affected by a decrease in water resources, although the Ter basin has a smaller water deficit. With regard to the supply capacity of the Barcelona Metropolitan Area, the indicative values are those corresponding to the Pyrenees, where it is stated that the contributions to the reservoirs that regulate each basin will be less reduced in the Ter basin than in the Llobregat and Besós basins due to the effects of climate change.
In summary, climate projections, trends in land use change, the estimation of the quantity and variability of available water resources over the next few years is one of the main management and planning challenges for both environmental and economic development. Therefore, appropriate solutions are required for water conservation and where sustainable use is promoted
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Recursos hidràulics -- Explotació -- Catalunya -- Barcelona
Hidrogeologia -- Catalunya -- Barcelona
Llobregat (Catalunya : Curs d'aigua) -- Aspectes ambientals
Besòs (Catalunya : Curs d'aigua) -- Aspectes ambientals
Ter (Catalunya : Curs d'aigua) -- Aspectes ambientals
Canvis climàtics -- Catalunya
Water resources development -- Catalonia -- Barcelona
Hydrogeology -- Catalunya -- Barcelona
Llobregat River (Catalonia) -- Environmental aspects
Ter River (Catalonia) -- Environmental aspects
Besòs River (Catalonia) -- Environmental aspects
Climatic changes -- Catalonia
Efecte del canvi climàtic a nivell estacional als recursos hídrics del sistema Ter-Llobregat-Besòs
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164662019-04-02T14:47:07Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Perceval Camps, Marina
2019-04-02T14:47:07Z
2019-04-02T14:47:07Z
2018-06
http://hdl.handle.net/10256/16466
This work focuses on the identification by facial recognition in newborns of loggerhead turtle (Caretta caretta). The photo-identification (photo-ID) opens new possibilities to many studies on population dynamics, sex ratio or migration.
Conservation work depends on our knowledge of the population, and for that individuals must be identified. In marine turtles the problem arises when it comes to identifying newborns that, due to their size, cannot be marked with rings, with PIT or other methods, as adults are marked. In adults, the technique of photo-ID utilizing the scale pattern of the facial profile, is also used.
The objective of this study is to validate photo-ID as a tool for the identification of turtles which have been photographed at birth, for the rest of their lives. To this end, we studied the viability of the software of P.I.T.MAR. (turtle facial identification program) for the identification, by means of images, of loggerhead turtle individuals obtained during the first six months of life. The stability of the facial scale pattern throughout these firsts months will be studied. To analyze the changes in this pattern and to check if the software is sensitive to these changes. Understanding the patterns of potential variation of the scales in turtle newborns could allow corrections in the criteria of individual identification of the turtles improving its effectiveness.
Our results show that there are changes in the scale pattern of the facial profile during the first year of life of the individuals, these changes are mainly due to growth and pigmentation. The software is sensitive to these changes because the identification capacity decreases with the increasing period between images of the same individual.
The IF is a promising technique for individual identification. More studies are needed in this field, increasing the sample and developing the software to adapt it to the recognition of turtle individuals in early stages
spa
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Caretta caretta
Tortugues marines -- Identificació
Sea turtles -- Identification
Estudio de la viabilidad de la fotoidentificación en recién nacidos de tortuga boba (Caretta caretta) y de la variación de las escamas a lo largo de los primeros seis meses de vida
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164672019-04-02T14:51:25Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Ramos Valios, Marina
2019-04-02T14:51:24Z
2019-04-02T14:51:24Z
2018-06
http://hdl.handle.net/10256/16467
The use of pesticidal products that have the least impact on the environment is widely acknowledged. Essential oils from a wide variety of plants have been used as insect repellents and larvicides for centuries. Nevertheless, the research that has evaluated the toxicity of essential oils in vertebrates is scarce or completely missing. This paper aims to test the toxicity of essential oils of green anise (Pimpinella anisum), basil (Ocimum basilicum) and blue eucalyptus (Eucalyptus globulus) with aquatic vertebrates. These oils are recognized larvicides. Embryos of less than 64 hours of zebra fish (Danio rerio) were used as a non-target organisms to conduct toxicity tests using concentrations of 70μL / L, 50μL / L and 20μL / L of the three oils The results obtained were used to find lethal concentration at which 50 of the tested organisms (LC 50) died through a Probit function. For anise, in the case of zebrafish, LC 50 was 48.47 μL / L while for eucalyptus and basil oils this concentration could not be found because we could not find dead more than half of the organisms in the treatments. In the case of mosquito larvae, similar results were found being the LC 50 for anise oil 59.97 μL / L. Again, we could not find the LC 50 for eucalyptus oils and basil. The differences between treatments were significant in the case of the experiments with anise, both with zebrafish embryos and mosquito larvae. These results support the efficacy of aniseed oil as larvicide but warn about the danger of using it in the environment. While basil and eucalyptus oils appear to be effective larvicides from other studies, our results do not support these findings and provide relevant information about the safety of these oils with vertebrates. Our results indicate the need to carry out specific tests with non-target organisms before accepting a priori that essential oils with larvicidal properties are safe for other all organisms living in aquatic systems
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Danio rerio
Essències -- Toxicologia
Peix zebra -- Toxicologia
Essences and essential oils -- Toxicology
Zebrafish -- Toxicology
Estudi sobre la toxicitat dels olis essencials Pimpinella anisum, Ocimum basilicum i Eucalyptus globulus sobre el peix zebra Danio rerio
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164682020-10-20T06:39:05Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Serrat Crehuet, Marià
2019-04-02T14:59:19Z
2019-04-02T14:59:19Z
2018-06
http://hdl.handle.net/10256/16468
Interspecific competition can be a key factor for the distribution and abundance of many species. The small carnivores are a guild with great potential for this type of competition, resulting in a fragile coexistence, with the need to reduce their overlap in temporal and spatial axes.
Due to low abundance and the difficulty in situ observation, the distribution and conservation of the wildcat (Felis silvestris) in Catalonia is poorly know, as well as the potential factors that may affect it, such as, for example, competitive biological interactions with other species of carnivorous.
To determine how important these interactions are for the distribution and conservation of Felis silvestris, by means of camera traps, we assessed the spatial and temporal distribution, as well as the frequency of small carnivore guild present in the Osona región. In this study area, the most representative species are the red fox (Vulpes vulpes), the badger (Meles meles), the common genet (Genetta genetta), the wildcat (Felis silvestris), the beech marten (Martes foina), the pine marten (Martes martes), as well as the domestic cat (Felis catus), which can also be seen among the other wild carnivores.
We found that these species are distributed irregularly in a relatively small territory, with remarkable diferences in the frequency between zones. Regions with more heterogeneous landscapes, combining forests and open areas, showed a higher frequency of most carnivores, including Felis silvestris, dethroning the supremacy of Vulpes vulpes in the other more forested areas. These results, together with the patterns of daily activity, have shown that all species coexist and that the wildcat prefer mosaic areas, besides not affecting too much that there is much or little presence of the other species of carnivores.
However, it is important to highlight thet we found some evidence for the hypothesis that the presence of Felis catus displaces the populations of Felis silvestris. A possible interspecific competition for the most vital resources can be a key factor for the presence-absence of the wildcat, since the zones with a high frequency of the domestic cat lacked the presence of the wildcat
spa
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Felis silvestris
Fèlids -- Catalunya -- Osona
Gat salvatge -- Catalunya -- Osona
Felidae -- Catalonia -- Osona
Wildcat -- Catalonia -- Osona
Competencia interespecífica entre el gato montés (Felis silvestris) y otros pequeños carnívoros
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164692019-04-02T15:09:18Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Villalonga Massutí, Pau
2019-04-02T15:09:18Z
2019-04-02T15:09:18Z
2018-06
http://hdl.handle.net/10256/16469
The current model of energy consumption (unsustainable and dependent on fossil fuels) entails important economic, social, political and environmental consequences. Increasing the energy efficiency of our homes is part of the transition to a more sustainable model, which allows us to cope with the important changes that we will face in the coming years, because of the decreasing availability of fossil energy materials, the general exhaustion of natural resources and the alteration of the climate. To achieve this, it is not enough to resort to renewable energy sources, we need a change in habits that will allow us to reduce and reorient our energy consumption.
This project wants to demonstrate the viability of a self-sufficient energy model applied to a real case: a 191 m2 house located in Selva (Mallorca) where two people live.
The electrical consumption of the house has been monitored during months and an estimate has been made about the consumption of the electrical household appliances. This has allowed to characterize the consumption of the house and to make predictions for the rest of the months of the year. A series of measures aimed at reducing the demand and energy consumption of the building have also been proposed.
Likewise, the following systems have been designed, adjusted to the demand of the house and to the climatic conditions of the zone, to take advantage of some renewable energy sources:
- A solar thermal installation to heat the sanitary water of the house.
- A photovoltaic installation to produce electricity considering 3 alternatives (an instant self-consumption photovoltaic installation, a self-consumption photovoltaic installation with accumulation and an isolated photovoltaic installation).
- A wind installation to produce electricity and complement the photovoltaic installation.
Finally, a study has been made about profitability and sustainability. This has allowed the comparation of the proposed alternatives and the expediency of their application both economically and environmentally
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Arquitectura i estalvi d’energia
Edificis -- Estalvi d'energia
Edificis -- Consum d’energia
Architecture and energy conservation
Buildings -- Energy conservation
Buildings -- Energy consumption
Anàlisi de la viabilitat d’un model d’autosuficiència energètica per a un habitatge
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164702019-04-02T15:30:16Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Tolosa Carnicé, Mariona
2019-04-02T15:26:59Z
2019-04-02T15:26:59Z
2018-06
http://hdl.handle.net/10256/16470
The objective of this study is to calculate a seasonal water balance that provides a detailed view of the available resource. The study has been considered for the Segre and Cinca basins. The methodology used has been the calculation of the water balance to know the quantity of the resource, from where the ETR value (plant evapotranspiration) has been calculated using the Zhang equation (Zhang et al. 2001) according to the percentage of land uses. Current results are compared with those of a future horizon for 2050 using the climate projections of Calbó et al. 2016. Seasonal variability decreases, making the conditions of high temperatures, high potential evapotranspiration and low rainfall period not the descriptive pattern of the climate that corresponds only to summer, also describe spring and autumn. For land use purposes, the lower part of the basins is altered by canalization and dams, causing the availability of water, water resources, and flows to be negatively altered with a considerable reduction in their volume, leaving the hottest months with a deficit of water. The lack of availability during the spring months causes the period of recharge required by the water cycle to disappear. This deficit of water will increase, more that now, by 2050. Recharge periods will be affected by making them be minimized, especially with a strong impact on the lower sub-basins of the interior.
In synthesis, in a future horizon a situation of water stress is presented that threatens the availability of water necessary to cover both the demand for human consumption and agricultural activity. The defined seasonality of the Mediterranean climate is lost and the management of water regulation in reservoirs where recharge will depend on episodes of heavy rainfall should be improved
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Hidrogeologia -- Ebre, Conca de l'
Segre (Catalunya : Curs d’aigua) -- Aspectes ambientals
Cinca (Aragó : Curs d’aigua) -- Aspectes ambientals
Canvis climàtics -- Catalunya
Hydrogeology -- Ebro River Watershed
Segre River (Catalonia) -- Environmental aspects
Cinca River (Catalonia) -- Environmental aspects
Climatic changes -- Catalonia
Anàlisi de l'impacte del canvi climàtic en els recursos hídrics de la Conca de l'Ebre
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164712019-04-02T15:51:16Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Hernandez Caballero, Albert
2019-04-02T15:51:16Z
2019-04-02T15:51:16Z
2018-09
http://hdl.handle.net/10256/16471
The present research is focused on the dendrocronologyc study of the climate change effect on beech-growth (Fagus sylvatica), in the Fageda d'En Jordà (Garrotxa). Two zones have been studied in function to their protection regime: the first catalogued as a Partial Nature Reserve (public managing) and the second catalogued as a Nature Park (private managing). The climatic variables chosen are the median temperature, the maximum temperature, the minimum temperature and precipitation. These climatic variables have been analysed considering different periods: annual, beech growing period (from March to August) and in de middle of beech growing period (April). The variables of growth studied are the width of the rings, the Increase of Basal Area (BAI) and the diameter. Also the age of individuals has been considered. Firstly, it has been evaluated if there was a variation of the climatic variables along the last 35 years. Straightaway, it has been analysed if there was a relationship between age and individuals growing. Finally, it has been determined if there is a linear regression between the climatic variables and the variables of individuals growth in the studied periods.
The results obtained, indicate a significant increase in median temperature and in minimum temperature along the years studied, in all variables used (annual median, median of growing period March-August, or April median). It has also been observed a significant influence of individuals age on their ring width and their diameter. Finally it has been possible to notice a BAI reduction in the Natural Reserve due to the growing period median temperature increase, but above all due to the annual, beech growing period (March-August) or April minimum temperature increase
cat
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Faigs -- Catalunya -- Jordà, Fageda de
Faigs -- Creixement -- Catalunya -- Jordà, Fageda de
Faigs -- Factors climàtics -- Catalunya -- Jordà, Fageda de
Dendrocronologia -- Catalunya -- Jordà, Fageda de
Fagus sylvatica -- Climatic changes -- Catalonia -- Jordà, Fageda de
Fagus sylvatica -- Growth -- Catalonia -- Jordà, Fageda de
Dendrochronology -- Catalonia -- Jordà, Fageda de
Avaluació de l’ús dels anells de creixement del faig com a indicadors del canvi climàtic
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164722019-04-02T16:00:33Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Llorente Carreras, Martí
2019-04-02T16:00:33Z
2019-04-02T16:00:33Z
2018-09
http://hdl.handle.net/10256/16472
The concern generated by the decline that is occurring in pollinator ecosystems due to intensive agricultural practices, the context of existing environmental crisis and the demands of consumers, promoted that new management techniques more respectful of the environment have emerged. Until the end of the last century, traditional agriculture based on the exclusive use of agrochemicals, had a predominant role in agricultural management. Subsequently, with the development of new more selective agrochemicals and methods of pest control such as mating disruption, the Integrated Production was developed; it is an agricultural production system that uses practices compatible with the improvement and protection of the environment, natural resources, genetic diversity and soil and landscape conservation. Organic Production is a production system based on the use of natural products for the control of pests and diseases. In the fruit growing areas of Girona province, last 15 years a great effort has been made to bring the Integrated Production to the highest possible level. The Ecological Production of apple crop has a recent development and the acreage is increasing bit by bit. This study presents the biodiversity of insects that play a prominent role in pollination in the two types of management. To carry out the study, two sampling methodologies were used, the PAN-TRAPS of ultraviolet colours: white, blue and yellow and the NEST-TRAPS. Samplings with the PAN-TRAPS were carried out in 2017 at the time of boom of the apple trees, in April, and a month later (May) to check if the composition of the pollinators was the same in three Integrated Production plots I, II, III and one Organic Production plot IV. The four plots have a composition of similar vegetation, a nearby water resource and are located in the fruit regions of Alt and Baix Empordà. The results present an inventory of pollinators captured through the PAN-TRAPS where the main exponents are part of the families: Lepidoptera, Coleoptera, Himenoptera and Diptera. The plot that presents a greater richness and abundance has been the one of Organic Production (plot IV). However, the genus composition in April has been similar in plots I, II and IV, but plot III presented differences, in the genus composition. In the sampling carried out in May, plot III has been the one that presented differences in the composition of pollinators with respect to the others. The three ultraviolet colours used in the PAN-TRAPS did not show significant differences regarding insect families or pollinator genus. The individuals captured in the NEST-TRAPS, were only able to complete their development those of the traps coming from two of the four plots sampled. They belong to two genera of Himenoptera: Osmia and Anthidium. The results obtained were analysed according to the management of each crop
cat
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Pomes -- Conreu -- Catalunya -- Alt Empordà
Pomes -- Conreu -- Catalunya -- Baix Empordà
Pomera -- Malalties i plagues -- Control biologic
Agricultura biològica -- Catalunya -- Empordà
Apples -- Breeding -- Catalonia -- Alt Empordà
Apples -- Breeding -- Catalonia -- Baix Empordà
Apples -- Breeding -- Diseases and pests -- Biological control
Pollination by insects
Pol·linització per insectes
Biodiversitat de pol·linitzadors en tres finques de producció integrada i una de producció ecològica a les comarques de l’Empordà
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164732019-04-02T16:12:20Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Martin Gordillo, Melani
2019-04-02T16:12:20Z
2019-04-02T16:12:20Z
2018-09
http://hdl.handle.net/10256/16473
"Design and valuation of Apps for the determination of plant species" is the study and creation of UikiPlant, an application for the identification of trees and shrubs.
UikiPlant is an application that aims to unite the field of environmental science with the new technologies field in order to create a product that gets the relation, connection and the awareness between the people and the nature stronger. For this purpose, a bibliographic search has been made in order to find out which applications currently exist to identify vegetal species, followed by a study of each one to discover their uses, utility and scope of applicability. After that, it has been discovered that most of them are free access, covering a wide geographical area and offering English as the main language. Besides, they can be used without any previous knowledge and most of them need pictures to accomplish the identification.
In the surveys that have been made for this work, it has been discovered that the most famous application for the survey respondent is Pl@ntNet and it is also the most downloaded. However, 60% of the survey respondent did not know about the existence of any kind of application for this purpose, but more of the 75% would have used them during the field trips. Besides, all of them find more convenient not to need internet to use the application and between the 23% and the 25% would be willing to pay for it.
Those are the reasons why it has been created an enjoyable, dynamic and easy to use application that allows to identify the trees or bush species that users are interested in. UikiPlant is supposed to be a free access application available in Catalan and hopefully, in the future, also in Spanish and English. It is not only easy to use but to take along to the field trips as well, with the future intention of making it work without any Internet connection.
The application includes all the trees and bush species that can be found in the Campus Montilivi surroundings, at the Girona University and it specifies their common name besides the scientific name, accompanied by pictures. In this way, the users that want to make a route around this area, can identify in a simple, quickly and enjoyable manner those species around them. Finally, it has to be said that UikiPlant is designed such as different people with distinct abilities and knowledge can use it, from fond of nature to botany students
cat
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Arbres -- Identificació -- Catalunya -- Girona
Arbustos -- Identificació -- Catalunya -- Girona
Aplicacions mòbils
Mobile apps
Trees -- Identification -- Catalonia -- Girona
Shrubs -- Identification -- Catalonia -- Girona
Universitat de Girona. Campus de Montilivi
Disseny i valoració d’Apps per a la determinació d’espècies vegetals: UikiPlant
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164742019-04-02T16:20:19Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Peña Naranjo, Ariadna
2019-04-02T16:19:22Z
2019-04-02T16:19:22Z
2018-09
http://hdl.handle.net/10256/16474
Sea urchins are considered as one of the main herbivores of marine ecosystems, to such an extent that they are able to modify the landscape given their great activity of grazing on seaweeds. Therefore, there are very different situations present in littoral habitats regarding the degradation due to the activity of sea urchins, in a very large area. This activity can also be modified by various factors such as the circadian rhythm, the season of year or the presence of signals related to their predators. This reaction to a risk signal is known as landscape of fear, and it can structure the landscapes significantly.
In order to evaluate all these factors, we conducted a photographic monitoring of 16 plots with mixed populations of the sea urchins Arbacia lixula (Linaeus, 1758) and Paracentrotus lividus (Lamarck, 1816). The selected points have different levels of barrens and hiding (crevices). With this monitoring, it was possible to record the high capacity of modeling the landscape that sea urchins have, since in the same plot the algal cover changes significantly throughout the year. There was high correlation between the percentage of barren areas and the density of the A.lixula specimens, this correlation was not found for P.lividus. In contrast, in day-night comparisons, no significant differences were obtained for the behavour of the two species.
On the other hand, we carried out experiments in aquariums with different specimens from both species, exposing them to the presence of dead sea urchins. Their movement rate was analyzed for two days and two nights (48 hours) and significant differences were found in the case of A. lixula, which reduces its activity with a risk situation. In addition, its activity increases at night, which could be associated with fear to daytime predators. Furthermore, in the tests made with P. lividus the results were not conclusive
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Attribution-NonCommercial-NoDerivatives 4.0 International
Arbacia lixula
Paracentrotus lividus
Eriçons de mar -- Hàbitat -- Catalunya -- Lloret de Mar
Sea urchins -- Habitat -- Catalonia -- Lloret de Mar
Analysis of different patterns in marine communities with Arbacia lixula and Paracentrotus lividus : annual and day-night changes in algal cover and response to predation
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164752019-04-03T07:46:08Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Periz Calonge, Marta
2019-04-03T07:46:08Z
2019-04-03T07:46:08Z
2018-09
http://hdl.handle.net/10256/16475
Traditionally, crop protection for bacterial and fungal diseases has been based on the use of agrochemicals, but some of them have shown harmful effects on the ecosystem and on animal and human health. Moreover, the reduction of active substances that can be use now in plant protection have prompted the development of new alternatives. Biological control is one of the most promising alternatives because it is an environmentally sound and effective means of reducing plant diseases through the use of natural enemies named Biological Control Agents (BCA).
Many bacteria pertaining to the Pseudomonas fluorescens group are promising bacteria to be used as BCA, but also as Plant Growth Promoting Bacteria (PGPB). These activities are due to some ecophysiological traits that are distributed phylogenetically among the main groups within this complex. Production of secondary metabolites with antifungal properties, as well as antibiotic or/and plant hormone production is the responsible for these activities.
The aim of this work was to carry out a classification into the eight phylogroups described by Garrido-Sanz et al. (2017) of a collection of 51 isolated belonging to P. fluorescens complex used in a previous work by Badosa (2001) in the UdG by means of their new developed PCR based system according to a pattern of presence / absence of nine molecular markers.
Firstly, an in-silico test was done to confirm that the primers described in the paper for each molecular marker actually amplified the gene sequence described.
Secondly, once the isolates have been recovered from freeze cultures, DNA was extracted using two different protocols. The SIGMA-ALDRICH Kit method showed the best results for obtaining DNA suitable for PCR amplification. Before PCR amplification of the nine molecular markers (DPGf_0, 1, 2, 3, 4, 5, 6, 7 and 8), 16S rDNA amplification was done in order to assure the correct DNA quality for amplification. It also was necessary to optimize the PCR annealing temperatures of the different primer pairs.
Finally, according the results obtained with the tested strains we classified 24 P. fluorescens, 8 P. corrugata, 6 P. koreensis, 3 P. protegens, 1 P. chlororaphis, 1 P. jessenii and 1 P. gessardii phylogroups and 7 strains remained without identification. Any strain was classified as P. mandelii.
In conclusion, we can state that the method proposed by Garrido et al (2017) is a reliable method to classify strains belonging to the P. fluorescens complex
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Attribution-NonCommercial-NoDerivatives 4.0 International
Pseudomones -- Filogènia
Plagues -- Agents de control biològic
Pseudomonas -- Phylogeny
Biological pest control agents
Pseudomonas fluorescens
Classificació en grups filogenòmics d'aïllats de Pseudomonas fluorescents interessants pel seu ús en protecció de cultiu
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164762019-04-03T07:55:20Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Riera Bachs, Albert
2019-04-03T07:55:20Z
2019-04-03T07:55:20Z
2018-09
http://hdl.handle.net/10256/16476
Changes in land cover are considered one of the most important forces of the global change
process. These shifts are the result of a complex interaction of the socioeconomic, cultural and
biophysical factors that act on different scales of space and time. For this reason, little is
known about the extent of these modifications. Within land cover changes, deforestation is
one of the worst-case phenomena globally, but in the North hemisphere the projections are
opposed. This dynamic in the Catalan Pyrenees has been marked by the rural exodus that
occurred during the second half of the twentieth century and which meant a significant
reduction in the population and the decline in the primary sector. These socio-economic
events have resulted in relevant landscape changes, causing homogenization of the territory
and the loss of biophysical diversity in the environment. It is for this reason, among others,
that it is necessary to analyse these changes in depth, in order to know more about their origin
and their consequences. This way, solid management proposals can be developed that help
mitigate its effects.
This document analyses the changes in the cover of the soil of the Natural Park of the
Capcaleres del Ter and Freser during the second half of the 20th century. These dynamics have
been compared with the demographic evolution of the area and the changes in the economic
system. The methodology used has been the Geographic Information Systems, which have
allowed the elaboration of cover maps, and a bibliographic search to interpret the causes and
the consequences. The results show an obvious shift in land cover, marked by the progress of
the dense forest, with the consequent loss of other roofs which in the past granted a mosaic
landscape in the Park. So it has been observed that this change has coincided with a transition
from the economic model and from demography and, therefore, these dynamics can be
considered intimately related. Finally, a series of potentially manageable areas, both
conservation and restoration, have been presented, to try to recover the lost spaces in this
period
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Paisatge -- Avaluació -- Catalunya -- Parc Natural de les Capçaleres del Ter i del Freser
Sòl, Ús del -- Aspectes ambientals -- Catalunya -- Parc Natural de les Capçaleres del Ter i del Freser
Home -- Influència sobre la natura -- Catalunya -- Parc Natural de les Capçaleres del Ter i del Freser
Land use -- Catalonia -- Parc Natural de les Capçaleres del Ter i del Freser
Landscape assessment -- Catalonia -- Parc Natural de les Capçaleres del Ter i del Freser
Nature -- Effect of human beings on Catalonia -- Parc Natural de les Capçaleres del Ter i del Freser
Anàlisi de canvi de paisatge al Parc Natural de les capçaleres del Ter i el Freser
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164772019-04-03T08:03:52Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Rodríguez Tanarro, Carolina
2019-04-03T08:03:52Z
2019-04-03T08:03:52Z
2018-09
http://hdl.handle.net/10256/16477
The tiger mosquito, Aedes (Stegomyia) albopictus (Skuse 1894), which in Catalonia has lived
with us for more than 10 years, is an important transmitter of viral diseases.
In the public ambit of our cities, it is found in the rainwater collecting catch basins, which are
their main breeding sites.
In the province of Girona, there is the “Program to support the management of the risks
derived from the presence of the tiger mosquito” created to control the proliferation of this
species. The present study is framed within this program, specifically, in the elaboration of a
cartography of the potential breeding sites of the tiger mosquito that is made for each
municipality. With this tool, the town councils can carry out control actions of the species,
based mainly on the application of larvicide in each map point.
The present work aims to improve the methodology as well as apply it to new municipalities
that have requested the program. A pilot test has been carried out with 6 municipalities, which
has allowed to determine the most suitable methodology, working directly with a geographic
information system (QGis) in the field. With this new method, which collects much more
information from each catch basin, 7760 have been mapped in 40 different municipalities. In
this way, each municipality receives a map with a simple code of 3 colors, which classifies
the catch basins according to their level of associated risk. 55% of them have a high level of
risk because they contain water inside them.
In order to determine the average water volume of a catch basin, 60 catch basins have been
analyzed in 6 municipalities throughout the year. A volume of 14 liters with a standard
deviation of 9.86 liters has been obtained. Analyzing the volume in the different zones, it has
been verified that it is constant during the months of activity of the tiger mosquito. Also, data
from a study did in 2011 in 15 municipalities have been analyzed. Of the 37 samplings
cat
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Mosquit tigre -- Catalunya -- Girona (Província)
Mosquit tigre -- Control -- Catalunya -- Girona (Província)
Aedes albopictus -- Catalonia -- Girona (Province)
Aedes albopictus -- Control -- Catalonia -- Girona (Province)
Anàlisi i cartografia dels punts de cria de mosquit tigre a la província de Girona i avaluació de les variacions de volum dels mateixos
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164972019-04-04T07:53:58Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Fernández Castellà, Erik
2019-04-04T07:53:58Z
2019-04-04T07:53:58Z
2019-02
http://hdl.handle.net/10256/16497
The growing need for the reuse of water and recovery of resources has awoken interest in the
regeneration of wastewater through new processes of membrane treatment that generate
high quality water. Forward osmosis is one of the promising technologies for wastewater
treatment due to lower energy requirements, higher permeate purity and lower fouling
tendency compared to the technologies that work at higher pressures. This system is based on
the natural phenomenon of osmosis: water is transported via a difference in concentrations of
solutes through a membrane that allows for the passage of water, but rejects most molecules
and ions. The application of forward osmosis also allows concentrate the content of organic
matter from wastewater and facilitates subsequent application of anaerobic digestion for
energy recovery. In this study, the feasibility of using forward osmosis to concentrate a sample
of urban wastewater was investigated and the composition of the concentrate was evaluated
for its recovery as an influent in anaerobic digestion. Two modules have been compared with
different membrane configurations: a submerged flat plate (Toray) and a hollow fiber
(Aquaporin). In order to do it, the capacity of membrane modules has been quantified to
concentrate in a pilot plant the organic matter of the wastewater from Quart’s WWTP under
different operating conditions, as well as its performance (water and reverse solute fluxes), its
fouling, the efficiency of various methods of cleaning and the influence of ionic species.
Studies have shown that forward osmosis technology allows the concentration of organic
matter from urban wastewater. The comparative analysis has shown that the Toray module
allows concentrate more effectively the organic matter, especially in those situations where
gas sparging was not used. However, this condition implies a lower water flux and a higher
fouling degree. Regarding the Aquaporin module, the reverse solute flux has been lower,
which implies a lower inhibition of the methanogenic activity in the subsequent anaerobic
digestion. On the other hand, the results of the characterization of ionic species have shown
that the sulphate concentration was higher in the experiments carried out with Aquaporin
module and with the Toray module when gas sparging was applied. This fact causes the
deterioration of the quality and the amount of the biogas produced by anaerobic digester
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Attribution-NonCommercial-NoDerivatives 4.0 International
Aigües residuals -- Depuració -- Tractament anaeròbic
Biogàs
Aigües residuals -- Plantes de tractament
Energies renovables
Osmosi
Sewage -- Purification -- Anaerobic treatment
Biogas
Sewage disposal plants
Renewable energy sources
Osmosis
Avaluació de l’ús de l’osmosi directa per a la concentració de l’aigua residual urbana
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/164982020-10-20T09:21:34Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Ribas Villalta, Blanca
2019-04-04T07:59:30Z
2019-04-04T07:59:30Z
2019-02
http://hdl.handle.net/10256/16498
The current document is a preliminary study of an assessment report for the government, Servei d’Educació Ambiental of Conselleria de Medi Ambient of Govern de les Illes Balears. The aim of the study has been reviewing a strategy, the Estratègia Balear d’Educació Ambiental (EBEA) and analysing the situation of environmental education in the Balearic Islands, to finally, establish proposes for the future.
The EBEA is an official document promoted by Govern de les Illes Balears and Universitat de les Illes Balears. It was published in 2003 and there are represented the objectives of environmental education agreed in a meeting, the Forum d’Educació Ambiental de les Illes Balears (FEAIB). This objectives, developed in specific actions, affect all sectors in the society.
Talking about the content, it has been developed in a participatory system, with experts on the subjects implied on it. After an analysis of the state of the art, data has been collected with a questionnaire to evaluate the achievement of the objectives of EBEA and determine its suitability. With the results, a list of action lines to develop by the government has been done. Its content and priority has been contrasted by interviews. So on, a panoramic picture of where is environmental education in the Islands and where does it has to go has been taken.
The results show that, despite the advances, there is a lack of achievement of EBEA’s objectives. The document has been determined current and valid. Now, it is necessary to work and debate on it in the celebration of a Forum and then, report the results.
Celebration of Forum and development of an Action Plan for EA, seem to be the priority lines that Government should boost, with the support and collaboration of other institutions, organizations and enterprises. From this point, the other action lines could be developed
cat
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Educació ambiental -- Illes Balears
Environmental education -- Balearic Islands
Estat de l’educació ambiental a les Illes Balears: l’estratègia balear d’educació ambiental
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/168662019-09-04T11:03:47Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Fusté i Sucarrats, Marc
2019-09-04T11:03:47Z
2019-09-04T11:03:47Z
2019-06
http://hdl.handle.net/10256/16866
cat
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info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Parc Natural dels Aiguamolls de l'Empordà (Catalunya) -- Aspectes ambientals
Hidrologia -- Catalunya -- Parc Natural dels Aiguamolls de l'Empordà
Albuferes -- Contingut en nitrogen -- Catalunya -- Parc Natural dels Aiguamolls de l'Empordà
Lagoons -- Nitrogen content -- Catalonia -- Parc Natural dels Aiguamolls de l'Empordà
Hydrology -- Catalonia -- Parc Natural dels Aiguamolls de l'Empordà
Avaluació de les aportacions de nitrogen per escorriment superficial a les llacunes de la RNI “Els Estanys” (PN dels Aiguamolls de l’Empordà)
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/168672019-09-04T11:50:50Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Gómez Ruiz, Celia
2019-09-04T11:49:33Z
2019-09-04T11:49:33Z
2019-06
http://hdl.handle.net/10256/16867
The constant increases in nutrients on the Catalan coasts, due to the population growth and industrial activities, have caused the eutrophication of coastal waters and intertidal ecosystems, causing various macroalgae groups to have diminished or even disappeared due to their low resistance to these nutrients, specifically nitrates. On the contrary, it is known that the Bangiaceae family of the Bangiales order, is tolerant to environments that contain a large load of nutrients, and for this reason, they are considered bioindicators of these sites. The objective of this study has been to evaluate, in artificial conditions in the laboratory, the response of two bladed Bangiales, Pyropia elongata and Neothemis ballesterosii, in different nitrates concentration (3 μmol /L and 30 μmol /L ), to observe possible effects on their survival and growth, produced during the monitoring of the gametophytic phase (blade) and the microscopic phase (Conchocelis), respectively. The results, have shown that the laminar phase of P. elongata shows significant differences to the effect of nitrates and survives in high concentrations (30 μmol /L of NO3). By contrast, the blades of N. ballesterosii, have been indifferent to the nitrate concentration of the culture, but have shown more resistance to high nitrates concentrations than P. elongata. The microscopic phase (Conchocelis) of the two species has been positively affected in mediums with 30 μmol/L of NO3, achieving a higher growth rate for N. ballesterosii. Although the two species have an important resistance to contaminated mediums, N. ballesterosii, has greater adaptability to eutrophicated environments. It has been proposed, due to its great resistance and the ability to consume nitrates, the use by cultivating these species, from Costa Brava, in eutrophic waters and the study of its organoleptic properties to confirm its commercial viability in integrated multitrophic aquaculture crops
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Attribution-NonCommercial-NoDerivatives 4.0 International
Pyropia elongata
Neothemis ballesterosii
Eutrofització
Algues vermelles -- Mediterrània, Mar
Nitrats
Eutrophication
Red algae -- Mediterranean Sea
Nitrates
Cultiu in vitro de bangials de la costa catalana
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/168822019-09-05T08:27:13Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Monclús Gairal, Júlia
2019-09-05T08:27:13Z
2019-09-05T08:27:13Z
2019-06
http://hdl.handle.net/10256/16882
The common minnow (Phoxinus sp.) is a specie in the family of Cyprinidae that lives in fresh, cold and oxygenated waters. Currently, it is distributed through all Europe, East Asia and Central Asia. This study focuses on the location of the species in the ponds of the Pyrenees, which was introduced at the end of the 20th century as live bait for trout fishing. This has caused an important negative impact, altering the nutrient cycle, transforming the trophic network and causing a diminution and / or elimination of native species. The LIFE + LimnoPirineus project in 2014 was involved with the aim of improving the state of conservation of aquatic species and habitats of these ponds in the Pyrenees of European interest.
This study aims to characterize Phoxinus sp. populations which are in three ponds of the Pyrenees; Naorte, Tres Estanys and Bassa Nord de Dellui. In order to carry it out, the growth patterns will be analysed using the Von Bertalanffy model and the demographics, based on the instantaneous mortality rate, for each of the three populations. These analyses will be carried out thanks to calcified bone structures, which are named otoliths. These structures allow to analyse the age of the fish thanks to growth rings, like the trunks of the trees. If there is a bad reading of these rings, later errors will appear in the characterizations of the populations, for this reason, this study also tries to make an improvement of the methodology used until the moment to realize the otoliths reading.
The results of this study have concluded that the reading with the new methodology of the otoliths of Phoxinus sp. has been a great progress for the characterization of the populations of the ponds, which have presented high longevity and slow growth rates. Regarding mortality, it has been seen that it is similarly slow in the three ponds, in line with the high longevities presented
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Attribution-NonCommercial-NoDerivatives 4.0 International
Phoxinus sp.
Ciprínids -- Catalunya -- Pirineu català
Animals invasors -- Catalunya -- Pirineu català
Biologia de poblacions -- Catalunya -- Pirineu català
Invasions biològiques -- Catalunya -- Pirineu català
Introduced organisms -- Catalonia -- Catalan Pyrenees
Cyprinidae -- -- Catalonia -- Catalan Pyrenees
Population biology -- Catalonia -- Catalan Pyrenees
Biological invasions -- -- Catalonia -- Catalan Pyrenees
Estudi de l’edat, el creixement i la demografia de l’espècie invasora Phoxinus sp. en tres estanys dels Pirineus
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/168832019-09-05T08:44:58Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Oriol Surroca, Anna
2019-09-05T08:44:57Z
2019-09-05T08:44:57Z
2019-06
http://hdl.handle.net/10256/16883
Faced with the problem at an ecological scale of the availability of water resources and the effect of climate change on connectivity in temporary rivers, it is appropriate to create a methodology to assess the magnitude of the effects that can be derived from this reality.
In this work, we elaborate a methodology that evaluates the relation to future climate projections and its effect on the water balance, how hydrographic connectivity in the temporary rivers and aquatic states will affect rivers in the future. These calculations are made on the Ebro basin, specifically to the sub-basins of the Segre and Cinca rivers where there are three differentiated climatic zones, which will suffer different pressures on their hydrological regime due to climate change.
Based on the hydrographic data of CHE (Confederación Hidrográfica del Ebro) and the climate projections of AEMET (Agencia Estatal de Meteorología), the method of the Tercer Informe del Canvi Climàtic a Catalunya (TICCC) has been developed to determine the relationship between water resources and precipitation in the current period and in the future as well with projections up to 2100. With this relationship, extrapolated data of the flows available in the future depend on the expected changes in this relationship.
The method has some of limitations, which are also evaluated and, therefore, wants to be the starting point to establish models of variation of the aquatic states in relation to the water balances and the climatic projections.
Finally, this methodology and the corresponding calculations warn of the existing problems of lack of water resources and ecological connectivity and the management needs that are based on the future availability of water, preserving the aquatic ecosystems that depend on these water regimes
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Cabal (Hidrologia) -- Mesurament -- Catalunya -- Segre, Conca del
Cabal (Hidrologia) -- Mesurament -- Catalunya -- Cinca, Conca del
Cabal (Hidrologia) -- Mesurament -- Catalunya -- Ebre, Conca del l’
Canvis climàtics -- Previsió -- Catalunya
Stream measurements -- Catalonia -- Segre, River Watershed
Stream measurements -- Catalonia -- Cinca, River Watershed
Stream measurements – Catalonia -- Ebre, River Watershed
Climatic changes – Forecasting -- Catalonia
Avaluació de la connectivitat fluvial a partir del balanç hídric i les projeccions climàtiques a la conca de l’Ebre
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/168842019-09-05T09:03:48Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Pruna Nieto, Sergi
2019-09-05T09:03:48Z
2019-09-05T09:03:48Z
2019-06
http://hdl.handle.net/10256/16884
The following document is a chemical and isotopic study about the water from the springs in Sant Hilari de Sacalm (Province of Girona). It focuses on the isotopes 𝛿18O and 𝛿2H, from which has been defined and analysed the water meteoric line for this area. The stable isotopes present in water might provide us with information about the processes to which it has been subjected. On this project, we focus specifically on 𝛿18O isotope which depending on its proportion with deuterium may be related with the precipitation height due to most of the sampled springs, are representative of local recharge in known heights using springs with an altitudinal recharge area already defined. With this method, we can plot a regression line model and use it to identify the recharge height of a single sample.
The study area is located in the Guilleries massif where the hydrogeological characteristics allow a high number of natural water springs. Therefore through the data provided by the University of Girona sampled during 2017 and 201, has been described the different kind of water depending on the hydrogeology and their chemical skills, and has been defined the most representative meteoric water line and altitudinal line.
Using geographical information Systems, have been located and defined the recharge area for each fountain and have been extracted the significative heights for the correlation with the isotopes. Afterwards each fountain has been classified depending on its chemicals and related with the geology and anthropic uses of the surroundings. Finally the meteoric water line has been defined, looking for the most representative, excluding the springs with unusual data or the ones put down to processes that may modify the real levels of isotopes. Such as due to a high rate of evaporation or the sulfur springs.
To conclude the project, we have compared Sant Hilari’s meteoric water line and altitudinal line with other data from the Montseny massif provided by the University of Barcelona to plot a more general model and it has been tested with sample from wells belonging to the deep aquifer located in the areas of La Selva and Osona’s plain
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Isòtops
Fonts -- Catalunya -- Sant Hilari Sacalm
Hidrogeologia -- Catalunya -- Sant Hilari Sacalm
Isotopes
Fountains -- Catalonia -- Sant Hilari Sacalm
Hydrogeology -- Catalonia -- Sant Hilari Sacalm
Establiment de la recta altitudinal i meteòrica del Montseny-Guilleries en base a dades hidroquímiques i isotòpiques de fonts
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/168852019-09-05T09:28:51Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Ramada Vílchez, Laila
2019-09-05T09:28:51Z
2019-09-05T09:28:51Z
2019-06
http://hdl.handle.net/10256/16885
SORELLÓ, Estudis al Medi Aquàtic S.L. is a company which is involved in the Life + Limno Pirineus project, that aims to improve the conservation status of aquatic species and habitats of European interest in the high mountain areas of the Pyrenees (CEAB-CSIC, s.d.).
One of the objectives of this project is the demographic study of invasive species populations, amongst them the brook trout (Salvelinus fontinalis). Although some demographic work has already been realized, the obtained results seem to be not very reliable, possibly related to the procedure used to determine the age of the trout’s.
Therefore, the here presented project is going to focus on the improvement of the methodology used to determine the age of the S. fontinalis by reading the rings of the bony structures called “otoliths” which provide information of the age. Combining the so obtained age with length and weight of the fish will result in adequate data to realize the demographic study.
To carry out the study the same samples of the introduced species, already used in previous studies (Dalmau Quera, 2017; Berché Barceló, 2017) will be used. Such samples were captured in the context of the above-mentioned project (Life + Limno Pirineus) during 2016 and 2017 in three high mountain ponds of Pallars Sobirà.
Finally the obtained data from the new demographic study will be compared with the corresponding results of previous studies. It is expected that the new technique for determining the age by reading the otolith rings will result in more reliable date regarding the ages of fish. In consequence it will be possible to compare the different demographic studies. It is expected that clear differences will be observed related to growth, mortality and physical condition due to the underestimation of age in the former studies
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Salvelinus fontinalis
Truites (Peixos) -- Catalunya -- Pirineu català
Animals invasors -- Catalunya -- Pirineu català
Biologia de poblacions -- Catalunya -- Pirineu català
Invasions biològiques -- Catalunya -- Pirineu català
Introduced organisms -- Catalonia -- Catalan Pyrenees
Trout -- Catalonia -- Catalan Pyrenees
Population biology -- Catalonia -- Catalan Pyrenees
Biological invasions -- Catalonia -- Catalan Pyrenees
Estudi i comparació del creixement, la mortalitat i la condició de l’espècia Salvelinus Fontinalis en tres estanys d’alta muntanya del Pirineu
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/168862019-09-05T09:47:22Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Rubio Martínez, Angel
2019-09-05T09:39:31Z
2019-09-05T09:39:31Z
2019-06
http://hdl.handle.net/10256/16886
The red swamp crayfish, Procambarus clarkii, is a species of the family of cambàrids. Since its introduction the distribution and the population have increased thanks to the great invasive potential and the anthropogenic impact until being catalogued as an invasive specie by the administration. To improve the ecological knowledge of P. clarkii it has been studied the effect of different water flows on crayfish metabolism, specifically the standard metabolic rate (SMR), the maximum metabolic rate (MMR) and the aerobic scope (AS), the morphological traits to differentiate males from females and they could influence metabolic rates and the causes of this. The technique of capture used to obtained the crayfish was fish trap, afterwards they were translated to the aquarium room and after their adaptation in aquariums they were taken to the laboratory. In the laboratory was determinate the oxygen consume (SMR, MMR and AS) in a experimental way through a swimming tunnel coupled to an intermittent-flow respirometre. The morphological traits were determined by ImagineJ program, which analyzed the images taken of each individual. The results has been observed that there were no significant differences between males and females in lineal relation to SMR, MMR and AS, and that there is a relationship between MMR and the total length and the body mass of the crayfish as to AS was only lineal relation to the total length and for SMR was not lineal relation with total length and body mass. Respect to the variance of the morphological traits that determinate the traits to identify and difference males to females are the right cheliped length, the abdomen width and the digestive system weight. In regard, the different morphological traits do not manifest any correlation with the physiological traits. The study of the effect of the different water flows in the metabolism determinate that the metabolism rate is increases when the flow speed increases. This has ecological implications that are relevant for the management and reduction populations of P. clarkii because the increase of the water’s speed and the presence of barriers in our rivers and streams can avoid crayfish dispersion. Finally, the principal causes of the variation in SMR were the eviscerted weight (musculature and exoskeleton) and the total length and for MMR it was the total weight and the total length
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Procambarus clarkia
Crancs de riu -- Metabolisme -- Catalunya
Invasions biològiques -- Catalunya
Animals invasors -- Catalunya
Introduced organisms -- Catalonia
Crayfish -- Metabolism -- Catalonia
Biological invasions -- Catalonia
Efecte del flux d'aigua en el metabolisme del cranc americà (Procambarus clarkii) i les seves aplicacions en la gestió i reducció de les poblacions en rius i rieres
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/168872019-09-05T09:59:17Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Barranquero Garcia, Andrés
2019-09-05T09:59:17Z
2019-09-05T09:59:17Z
2019-06
http://hdl.handle.net/10256/16887
The soil is a natural resource not renewable in the short term that is involved in processes affecting environmental quality, such as the ability to sequester atmospheric CO2.This relevance is not always taken into account. Within this context, soil carbon sequestration may be related to factors of formation, such parent material, climate, living organisms, geomorphology and chronological time, as main determinants of the processes of edaphogenesis.
In the surroundings of the Montilivi campus of the Universitat de Girona (study area), climate, biotic entities, geomorphology and time are considered similar, whilst two different geological units in the geological map 1:50.000 of the Institut Cartogràfic i geològic de Catalunya (NPlac i Qac) were identified.
This paper aims to characterize four soil profiles located in the study area (profiles 1, 2 and 3 formed on the NPlac unit and 4 on Qac), assess the soil carbon sequestration capacity and determine which parameters may have more influence on it.
Different physicochemical parameters have been determined (gravel, bulk density, particle size separates, textural class, pH, electrical conductivity, carbonates, total organic carbon, oxidizing carbon and total nitrogen) of the different horizons of the four profiles. In addition, different biochemical parameters related to the carbon cycle have been determined in the surface horizons of these profiles (potential soil respiration, daily respiratory activity, mineralization coefficient, total glomalin and easily extractable glomalin).
The results obtained, from the four soil profiles, classified as Typic Haploxerept (Profiles 1 and 3), Typic Calcixerept (Profile 2) and Inceptic Haploxeralf (Profile 4), showed differences in physicochemical (pH, electrical conductivity, bulk density, organic carbon, nitrogen, carbonates and texture) and biochemical properties (total glomalin and easily extractable glomalin). Soil profiles 2 and 4 were mostly differentiated due to the presence of carbonates and higher abundance of organic decaying debris, respectively. The geological setting (NPlac) on which lays profile 2 presents a discontinuity formed by a calcareous crust
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Sòls -- Anàlisi -- Catalunya -- Girona
Emmagatzematge de carboni -- Catalunya -- Girona
Soils -- Analysis -- Catalonia Girona
Carbon sequestration -- Catalonia -- Girona
Capacitat de segrest de carboni dels sòls del Campus de Montilivi/ UdG
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/170702020-02-05T13:07:47Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Poch Cartañá, Santiago
2019-10-24T10:39:28Z
2019-10-24T10:39:28Z
2019-09
http://hdl.handle.net/10256/17070
The European pond turtle (Emys orbicularis) and the Mediterranean pond turtle (Mauremys leprosa) are the two native species of the Iberian Peninsula. The first one has seen an important decline at peninsula scale, mainly due to habitat loss. During the last years, there have been some projects to improve the state of his populations in Girona region. In spite of that, the specie has not been able to recover to the impacts that it has been suffering since the fifty’s decade, with the drying of water bodies to convert them into crops and industrial parks. In this study, it has been evaluated the nucleus of E. orbicularis in Estany de Sils, a protected zone that is part of PEIN and N2000 network. In addition, it has been defined the quality of it as a habitat, and it has been evaluated, trough the database of Fundació Emys, the dispersal happening during the last years with the main goal of identifying the role that the Estany de Sils can play in the connectivity with the nuclei previously studied by Fundació Emys. The result of the analysis of the population has shown a population size of 285 individuals. The sex ratio was divided in: 65% males, 25% of them, 6% juveniles, 2% neonates and finally the 2% of individuals of whom the sex could not be defined. The habitat characterization has shown a low quality area, in conservation and forest river terms, with presence of exotic species (animal and plant) and, in some cases, with wastes. In terms of dispersal and reproduction, it has been confirmed the presence of two newborns and two dispersal routes, with four happenings in a ten-year period. These numbers explain the connectivity between the Estany de Sils and the Riera de Caldes de Malavella by one hand and show evidence of reproduction by the other. Finally, the habitat analyze with GIS software has drawn a really wide scenario, with forests, open spaces, irrigation channels and streams that could carry out the function of corridor to a big amount of species. Instead of that, the barrier effect due to the traffic infrastructures could have caused the low number of dispersal events observed
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Emys orbicularis
Emídids -- Hàbitat -- Catalunya -- Selva
Emídids -- Cria i desenvolupament -- Catalunya -- Selva
Emydidae -- Habitat -- Catalonia -- Selva
Emydidae -- Breeding -- Catalonia -- Selva
Descripció morfològica i anàlisi de la connectivitat del nucli poblacional de tortuga d’estany (Emys orbicularis) al PEIN Estanys de Sils
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/172302019-11-25T11:24:04Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Guasch Vallés, Joaquim
2019-11-25T11:24:04Z
2019-11-25T11:24:04Z
2019-09
http://hdl.handle.net/10256/17230
The Costa Brava is an area with a strong influx and tourist pressure. This fact, causes the local economy to devote much of the resources to meet the needs of this sector of the population, and directly, implies a continuous urban growth. The dwellings that are built, often disseminated, are destined for second residences that are only occuppied during the summer period, and this entails a set of environmental impacts and the degradation of the natural environment. One of the most important impact that tourism causes in this area is the consumption and exploitation of water resources.
The purpose of this project is to evaluate the sustainability of current and future urban planning in the area of the Costa Brava, through the study of the state, supply and availability of these water resources.
The methodology used has three fundamental aspects. On the one hand, a thorough investigation of information has been carried out by means of scientific articles, urban and administrative documentation, and web pages, which have allowed them to develop a series of future water demand estimates, as well as determine the state of the masses of water from which the population of the Costa Brava is supplied. On the other hand, through geographic information systems, the information collected could be represented cartographically. Finally, through interviews with experts related to the water management sector, it has been possible to understand from a global perspective, which is the problem that derives from the exploitation of this resource.
The results obtained show, on the one hand that in general the state of the water mass, both superficial and underground, are deficient at the qualitative and quantitative level, so that there has been clear evidence of a lack of current water availability in the field of study. On the other hand, and through the simulation of 4 scenarios of population growth according to different perspectives of the urban planning, it has been possible to determine that on the horizon of the year 2030 there will be a considerable increase of the water demand of the municipalities of the Costa Brava in relation to current values. Finally, the interviews carried out have allowed us to consider the problem of water resources from a holistic point of view, where the quality and quantity of this resource is not only determined by the use of human consumption but that the general problem goes much further
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Recursos hidràulics -- Explotació -- Catalunya -- Costa Brava
Aigua -- Consum -- Catalunya -- Costa Brava
Turisme -- Aspectes ambientals -- Catalunya -- Costa Brava
Water resources development -- Catalonia -- Costa Brava
Water consumption -- Catalonia -- Costa Brava
Tourist trade -- Environmental aspects -- Catalonia -- Costa Brava
Avaluació de la sostenibilitat del planejament urbanístic en l’àmbit de la Costa Brava : estudi de la disponibilitat i demanda dels recursos hídrics
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/172312019-11-25T11:28:32Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Kravtchenko Babakova, Anastasya
2019-11-25T11:28:32Z
2019-11-25T11:28:32Z
2019-09
http://hdl.handle.net/10256/17231
Direct wastewater discharges to the environment will cause problems due to the uncontrolled availability of nutrients. Energy consumption in wastewater treatment must be optimized to promote sustainability. Moreover, nutrients can be recovered as a resource to produce agricultural fertilizers in the framework of the circular economy. Partial nitrification combined to anaerobic ammonium oxidation -anammox- (PNA) allows for fully autotrophic nitrogen removal from wastewater, which implies significant energy savings with respect to conventional treatment alternatives Additionally, phosphorus bio induced mineralization may be an interesting way for the recovery of this nutrient. This work deals with the start-up of a PNA process in one SBR using granular biomass for the treatment of the anaerobically digested sludge dewatering centrate produced in the side stream of a municipal wastewater treatment plant. This study has been carried out in the framework of the R & D project “DIGESTAKE” (COMRDI-16-0061).
The start-up of the PNA SBR was successfully achieved after 200 days. Final ammonium removal rate reached was about 300 mg N L-1 d-1. The emission of N2O was identified as potentially significant. The growth of granular biomass was characterized. Final suspended solids content in the reactor was 2739 mg L-1 (95% volatile). However, phosphate bio induced mineralization was not significantly achieved. The addition of an extra amount of calcium or magnesium ions inside the reactor is advised to promote such process
eng
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Aigües residuals -- Depuració -- Tractament biològic
Aigües residuals -- Depuració -- Desnitrificació
Bioreactors
Sewage -- Purification -- Nitrogen removal
Sewage - -Purification -- Biological treatment
Application of the anammox process under microaerophile conditions to anaerobic digestates for nitrogen removal and bio-induced phosphorus precipitation
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/172332019-11-25T11:33:18Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Pareja Parcet, Eloi
2019-11-25T11:33:18Z
2019-11-25T11:33:18Z
2019-09
http://hdl.handle.net/10256/17233
The introduction of species is one of the five principle causes of the loss of biodiversity and, in the recent past, is a problem which has gathered force. This increase is a consequence of new global forces, such as transport and commerce, are ending a long period of biological isolation. This present study is centred on the amphibians and has, as its objective, to evaluate and to recognise the burden of traffic in fauna on the arrival of new species on a geographic area in which they are not native forms.
In order to carry out this project, bibliographical research was carried out in order to understand the problem and to identify the sources which would best serve for the basis of data in a second part. The data base is the foundation of the study as it permits knowledge of: the species of amphibians which have arrived in Spain from Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), those which are protected by the said convention, the species which are found to be commercially available in the internal market in the country and the invasive exotic amphibians which are present in the environment. This generated data was treated to discover the results and confirm or refute the initial predictions, which are the following; (1) the number of transactions regulated by CITES has increased over the past years, (2) there should be no species protected by the Convention being commercially available in Spain and, (3) the commercialization of exotic amphibians has a negative impact not only on the native ecosystem but also on the receiving ecosystem.
With the obtained results, the first and third predictions have been confirmed, while the second has been refuted. In this way a significant increase in the number of transactions regulated by CITES has been observed, but only for anura, not for the urodela and the caecilians. On the other hand, based on the numbers of examples commercially available, negative consequences can be inferred from the traffic in fauna for native and receptor ecosystems. Furthermore, protected species were not expected to be found in the businesses studied, but various examples were found in the research carried out.
With the study carried out it was hoped to recognise the importance and the consequences of commerce in the affected species, over the originating ecosystems and, often, on the receptor ecosystems in which they can become naturalised
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Amfibis -- Comerç -- Espanya
Espècies amenaçades
Animals invasors
Invasions biològiques
Amphibians -- Commerce -- Spain
Endangered species
Introduced organisms
Biological invasions
El tràfic de fauna salvatge a Espanya : una investigació a la xarxa
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/172342020-10-20T06:42:06Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Puig Muñoz, Roger
2019-11-25T11:37:06Z
2019-11-25T11:37:06Z
2019-09
http://hdl.handle.net/10256/17234
Fishing pressure is understood as the level of activity of fishing fleets, and when this is very high it can generate what is known as overfishing and consequently all the negative effects on biodiversity that can be derived. In this study, we intend to make a global analysis of this problem in the Catalan coast during the last ten years by three different fishing methodologies: trawling seine fishing and surface longline, and thus be able to observe what trends are present in the fleets fishing activities relating to compliance with legislation. It is also intended to observe how the three fishing methods studied have evolved, either in the number of vessels or in the intensity of the fishing activity. To carry out the aforementioned tasks, a cartography has been drawn up in which the spatial distributions during the series from 2009 to 2018 can be appreciated, for each art and year, and thus be able to observe in detail the differences existing in the spatial distributions of each year after year. In these maps it is observed that for the three arts, there are several infractions referring to the regulations, and as a special case, the delta of the Ebro by the art of drag, since it is the clearest case of all. Next, a part of this study has also been dedicated to an analysis by seasons, that is, what are the possible effects of the different seasons of the year on the spatial distributions of the fishing fleets. In order to fulfil this last analysis, the data of the whole year 2018 have been separated according to the season of the year in which they were, that is, winter, spring, autumn and summer, and a map has been drawn up for each art and station of the year, obtaining a total of twelve. In this last analysis, the possibility of observing the effects of the implementation of temporary closures on the spatial distributions of the fishing fleets has been interesting, since it has been seen that while in the areas delimited by the closure the fishing activity is practically null , in the rest of the Catalan coastal areas, the fishing intensity increases. As main conclusions, this study allows us to say that VMS data are a good tool to control fishing, and in the specific case of the coast of Catalonia it is clear that this control is not being done correctly since there are too infractions
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Indústria pesquera -- Aspectes ambientals -- Catalunya
Fisheries -- Environmental aspects -- Catalonia
Avaluació i anàlisi de la pressió pesquera a la costa de Catalunya mitjançant dades VMS
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/178332020-03-16T11:24:08Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Quílez García, Gemma
2020-03-16T11:24:08Z
2020-03-16T11:24:08Z
2020-02
http://hdl.handle.net/10256/17833
Due to the current environmental reality, along with the predictions for the coming years, the future scenarios show an increasingly difficult access to water. Therefore, the interest in water reuse, and in the technologies that allow it, has increased. The regeneration of greywaters, which are less contaminated than conventional wastewater, is presented as a very good option for water recovery.
During this thesis, greywater treatment by a hydroponic system (vertECO) was analysed. This Nature based Solution allows the obtention of regenerated water. Water quality for reuse was evaluated according to the parameters defined in the Spanish Royal Decree 1620/2007 and the Proposal for a Regulation of the European Parliament and of the Council on minimum requirements for water reuse.
Results showed a remarkable reduction on both the biological parameters (Escherichia coli, Legionella sp.) and the physical-chemical ones (turbidity, total suspended solids and biochemical demand of oxygen), maintaining the electrical conductivity below the limits established by the legislation. This reclaimed water cannot be consumed as drinking water, but it could be reused as water for residential use, for public service and for crop irrigation (depending on the degree of water exposure).
Likewise, the possibility of growing edible plants directly exposed to greywater and determining the risk of their intake was determined according to the Commission Regulation (EC) No 1881/2006 of contaminants in food product, with heavy metals (cadmium and lead) analyses in the plants. It was found that, in most cases, direct exposure of edible plants to greywater did not present a heavy metal concentration high enough to be dangerous to human wellbeing. Thus, these plants would be safe of intake by humans
spa
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Aigües residuals -- Depuració -- Tractament biològic
Hidroponia
Sewage -- Purification -- Biological treatment
Hydroponics
Tratamiento de aguas grises con sistemes hidropónicos : cumplimiento con la legislación para la reutilización de agua
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/178342020-03-16T11:29:45Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Danés Calm, Albert
2020-03-16T11:29:45Z
2020-03-16T11:29:45Z
2020-02
http://hdl.handle.net/10256/17834
The box tree moth, Cydalima perspectalis, is an invasive alien species of the Crambidae family. Since it was accidentally introduced in Catalonia it has rapidly spread causing significant damage to the box tree (Buxus sempervirens) with severe and consecutive defoliations that have left the box tree population of natural forests and urban areas in a critical situation. The first data of the arrival of C. perspectalis in Catalonia was in 2014, specifically in la Garrotxa although it wasn’t until 2017 that the great impact of this species on natural habitats was noticed.
In order to contribute to improve the ecological knowledge of the box tree moth, the condition of the box trees was studied to determine the affectation degree and estimate the capacity of survival that they present. From the cartography of the habitats of Catalonia, a map has been drawn up where the Garrotxa habitats have been selected with more box tree presence. In these habitats 10 plots have been chosen and in each of them 15 box trees have been marked. The samplings were performed in 2019, one in summer, between July and September, when caterpillars are more active and butterflies show their highest flight peak, and another in winter, in December, when larvae are in a state of hibernation and box trees don not suffer defoliation.
Comparing the two samples, results show that on the one hand, most of the plots studied are in a deterioration in the state of the box trees, both in the number of sprouts and the distribution they present in the plant, causing its concentration at the base of the box tree. On the other hand, it has been observed that there are plots showing an improvement in the sprouting, which can be caused by a delayed affectation. In short, plot averages show significant differences between them, possibly due to variation in sampling dates
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Buxus sempervirens
Cydalima perspectalis
Papallones -- Catalunya -- Parc Natural de la Zona Volcànica de la Garrotxa
Animals invasors -- Catalunya -- Parc Natural de la Zona Volcànica de la Garrotxa
Invasions biològiques -- Catalunya -- Parc Natural de la Zona Volcànica de la Garrotxa
Arbustos -- Catalunya -- Parc Natural de la Zona Volcànica de la Garrotxa
Butterflies -- Catalonia -- Parc Natural de la Zona Volcànica de la Garrotxa
Introduced organisms -- Catalonia -- Parc Natural de la Zona Volcànica de la Garrotxa
Biological invasions -- Catalonia -- Parc Natural de la Zona Volcànica de la Garrotxa
Shrubs -- Catalonia -- Parc Natural de la Zona Volcànica de la Garrotxa
Estudi de la capacitat de rebrotada del boix (Buxus sempervirens) afectat per la papallona del boix (Cydalima perspectalis) a la comarca de la Garrotxa
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/205102022-01-28T11:21:43Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Aguilera Moncunill, Ester
2022-01-28T11:21:43Z
2022-01-28T11:21:43Z
2021-06-01
http://hdl.handle.net/10256/20510
Outbreaks of waterborne diseases still are a public health problem in the 21st century,
especially on developing countries, but also in developed countries.
Drinking Water Treatment Plants (DWTP) are in charge of guaranteeing that tap water
has a good quality (in terms of both microbiological and physicochemical aspects), so
that, among other things, they minimize the risk of suffering an infectious disease.
Nevertheless, perturbations during the treatment process, extreme meteorological
conditions or tap water pollution during its distribution can trigger microbiological risk
and can provoke epidemic outbreaks.
To quantify microbiological risk QMRA (Quantitative Microbiological Risk Assessment)
methodology can be applied. QMRA is a four steps methodology that explores several
aspects as: type of pathogenic microorganisms, inlet water characteristics, treatment
operation, epidemiological data, etc.
In the present report microbiological risk of tap water treated by DWTP Ter is analyzed
according to the QMRA methodology.
First of all, a classification algorithm has been developed to estimate the microbiological
concentration on the DWTP inlet by using different environmental conditions daily
monitored. The algorithm has been developed using big volumes of data (daily data from
historical series of 20 years), and for this reason it was necessary to use Data Mining
tools.
Finally, estimated microbiological concentrations have been used to calculate one of the
most common metrics used for quantifying microbiological risk: DALY (Disability
Adjusted Life Years). This metric has been calculated following the WHO’s and
Microrisk’s manuals directrices. DALY has allowed to quantify the risk in a range of
values and has allowed to visualize under which conditions a dangerous situation could
arise.
Microbiological risk calculus for tap water treated in DWTP Ter has been resulted to be
low in most of the cases, but some scenarios where the risk would overcome the WHO’s
limit have been detected. Special focus should be paid on these scenarios, where water
treatment should be more accurate
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Drinking water -- Analysis
Aigua potable -- Anàlisi
Aigua potable -- Depuració
Drinking water -- Purification
Quantitative Microbiological Risk Assessment
Algorismes
Algorithms
Aigua -- Plantes de tractament
Water treatment plants
Anàlisi de dades de potabilització d’aigua per estimar el risc microbiològic de l’aigua potable
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/205112022-04-19T14:12:44Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Calafat Gestoso, Maria del Carme
2022-01-28T11:36:31Z
2022-01-28T11:36:31Z
2021-06-01
http://hdl.handle.net/10256/20511
The coastal area is widely used by the population to live, to carry out economic activities that
have their reason to be in this space, for tourism and other leisure activities. In Catalonia, the
coast is a highly fragile space because of the ecosystems it constitutes and it is in a clear
recession due to the tourist affectation and the natural affectation of the continental drift.
Beaches have been and still are the basis of tourist activity and contribute to 11% of the national
GNP (Gross National Product). In the last seventy years, their management has been focused
on promoting the leisure and recreational function while the natural functions of protection
and ecological reserve, also very important functions, have been left aside or even eliminated.
The objective of this work is to establish a series of transition strategies towards
renaturalization that will balance the functions of the beaches by changing the current
approach to ecosystem management and differentiating it according to each type of beach.
In order to carry out this work, the evolution of the beaches along the Catalan coast has been
analyzed to see their retreat, the before and after effects of human pressure, and to
demonstrate the change in the dune system in previous and current years. Useful and
inefficient strategies of renaturation and dune restoration have also been identified to
understand that it is necessary to have knowledge about the area to be managed, as evidence
of ineffective measures and to know how to act correctly. The practices are accompanied by
monitoring and maintenance measures to ensure the functionality of the established
strategies. These measures are essential to understand the processes and improve the
techniques used. In addition, a series of interviews have been conducted in which experts give
their opinion and vision and show their expertise for the achievement of our goals.
Finally, this work results in a table indicating the transition measures to be applied to each
type of beach: urban, semi-urban or natural. It should serve as a generic management
model to begin a change of paradigm towards a more sustainable one through nonintervention (non-artificialization)
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Litoral - Protecció
Shore protection
Seashore ecology
Litoral - Ecologia
Ecologia de les dunes
Sand dune ecology
Model de transició per a la renaturalització de platges
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/205122022-01-28T11:44:49Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Cardona Gilabert, Biel
2022-01-28T11:44:49Z
2022-01-28T11:44:49Z
2021-05-31
http://hdl.handle.net/10256/20512
This work is a general revision of four scientific documents about climate change, and its aim is
to find what extreme weather phenomena can show a worsening due to Climate Change in the
west Mediterranean, especially in Catalonia.
To do so, in addition to the bibliographic research, the behaviour of some extreme weather
phenomena has been analysed from data extracted of AdapteCCa platform that have been realized
by CORDEX project. From that data there have been done some trend charts, two representative
concentration trajectories of the greenhouse gas emissions have been compared with each other
(RCP 4.5 and RCP 8.5) and it has been analysed its statistic signification. There has also been
analysed if there exist trend differences between the zones of the Pyrenees and Costa Brava.
When all the variables have been analysed, it has been concluded that the projections that are
summarized in the documents reviewed are confirmed with the climate models from the statistic
projections. It is expected that temperatures will be higher, there will be more heat waves and
droughts will be longer. However, it is going to rain nearly the same that it does now, but this will
occur in shorter periods which will be more intense. It has also been found that extraordinary
severe weather phenomena are very difficult to predict, as they have a very low temporal
frequency, and this increases the difficulty to obtain historical precedents and to create future
projections.
In short, if greenhouse effect gases emissions are not cut down or, at least, reduced, if society
doesn’t make a large-scale change and if sustainable economy based on renewable energies aren’t
promoted, we are going to have a global climate, that in the west Mediterranean and in Catalonia,
where a lot of extreme weather phenomena could increase due to climate change
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Meteorologia -- Observacions
Meteorology -- Observations
Mediterrània Occidental
Western Mediterranean
Canvis climàtics
Climatic changes
Fenòmens meteorològics extrems a la Mediterrània Occidental en un context de canvi climàtic
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/205132022-01-28T11:54:48Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
López Céspedes, Cristina
2022-01-28T11:50:45Z
2022-01-28T11:50:45Z
2021-06-01
http://hdl.handle.net/10256/20513
Moving towards a more sustainable model is one of the biggest challenges nowadays society
is facing, because of this since the 1990s, the first voluntary environmental management
standards were published which aimed to integrate the environment into the management
of companies and organizations. This fact meant a change in the organizational model
including the environment in more proactively way in all parts of the process. As in the case
of beach management systems, which have been added to this trend and the benefits that
these systems can bring. In order to achieve this, it has been decided to propose an
Environmental Declaration for the beach system of the municipality of Barcelona, following
the requirements proposed by the EMAS regulation and following the environmental policy
previously proposed by Barcelona City Council for the management of beaches. The aim of
this environmental statement is to summarize and aimed at the public, all information
regarding the beaches in terms of organization, services, municipal policy, environmental
management, behaviour and environmental regulations that the affect them.
In order to make the proposal for the environmental declaration of the beaches of
Barcelona, the legal regulations applicable to the voluntary participation of organizations in
environmental management systems, set out in EC Regulation 1221/2009, have been used
at all times. Other environmental declarations applied to different beach systems on the
Catalan coast have also been used as references. In order to obtain the necessary
information to conduct Barcelona’s beaches’ management analysis, there has been help
from external agents as the City Hall’s web and technicians from the beaches from
Barcelona’s system. In some other cases the information has been compiled in situ thanks
to the job done by the beach during 2020 season.
With this case study, the aim is to create a joint system between all the parties in charge of
beach management, to promote safer facilities for users and workers and with a more
environmentally friendly behaviour
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Litoral - Protecció
Shore protection
Barcelona
Gestió ambiental
Environmental management
Sistemes de gestió ambiental - Cas pràctic. Declaració ambiental del sistema de platges de Barcelona
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/217512022-10-05T10:13:47Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Vázquez Recasens, Jordi
2022-10-05T10:13:47Z
2022-10-05T10:13:47Z
2022-09
http://hdl.handle.net/10256/21751
The scarcity of refuges in a recently burned area can make it difficult for some species of birds to recolonize the territory after the fire, especially for birds with a preference for closed habitats, such as scrubs or forests. In this sense, a structure such as dry stone walls, so typical of Mediterranean landscapes and linked to ancient vineyards, may be important for birds due to their ecological functions and because they may be an alternative refuge for some species.
This study analyzes the effect of dry stone walls on the recolonization of the area burned by the Llançà fire of July 2021 by birds. The pre-existing habitat before the fire was scrub, a habitat that retains very little structure after a severe fire like this, unlike a forest. Therefore, the shortage of shelters is likely to be greater. There are no previous studies focused on the ecological functions of dry stone walls in relation to birds, however they do exist with other faunal groups, although they are scarce. Giving value dry stone is important for its conservation in the face of the progressive deterioration it has been suffered for years.
To carry out the study, bird censuses have been carried out at different sampling stations distributed throughout the burned area and densities of stone walls have been obtained. Other environmental variables have also been measured, such as the slope and orientation of the land, the severity of the fire and the presence of patches of unburned vegetation. The results obtained do not seem to show a clear relationship between the stone walls and the birds and a high percentage of unexplained variability has been obtained. New variables should be included in the study, such as the characterization of the habitat associated with the stone wall, as well as expanding the temporal and spatial scale to include a greater number of bird species in different postfire scenarios. Although rupicolous species could be considered good candidates for using stone walls to nest or take refuge because of their similarity to the preferred natural habitat of these birds, only two of these species (the blue rock thrush Monticola solitarius and the black redstart Phoenicurus ochruros) have appeared in the study area and, in addition, the results do not indicate that this hypothesis is fulfilled. On the other hand, the community of registered birds is quite heterogeneous with regard to the habitat preference of the species. The area burned less than a year ago offers patches of unburned vegetation, regrown trees, and a high density of herbaceous plants that seem to cover the needs of species in open spaces, thickets, and semi-forest spaces with scattered trees and shrub cover
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Murs de pedra -- Catalunya -- Llançà
Ocells -- Habitatge -- Catalunya -- Llançà
Ocells -- Reintroducció -- Catalunya -- Llançà
Ocells -- Efecte dels incendis -- Catalunya -- Llançà
Stone walls -- Catalonia -- Llançà
Birds -- Housing -- Catalonia -- Llançà
Birds reintroduction -- Catalonia -- Llançà
Birds -- Effect of fires on -- Catalonia -- Llançà
Efecte dels murs de pedra seca en la recolonització d'una àrea cremada pels ocells
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/233532023-11-06T11:13:57Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
León Moreno, Ashley
2023-09-20T11:28:39Z
2023-09-20T11:28:39Z
2023-02
http://hdl.handle.net/10256/23353
The aim of this work is to compile and analyze some 60 territorial conflicts in the Baix
Empordà region during the period 1970-2022. The main objective is to understand the
evolution and role in the conservation of the landscape and natural heritage in relation to
territorial conflicts in the aforementioned period through research, interpretation, recording
and bibliographical analysis, as well as its relationship and reflection with the concept of
NIMBY (Not In My Back Yard).
Furthermore, the work is part of the research of the MOVxPAIMED 2021-2025 project:
"Paisajes Salvados/Paisajes por Salvar. Social mobilization and preservation of the coastal
landscape of the Spanish Mediterranean '' created by the Anàlisi i Planificació Territorial i
Ambiental research group of the University of Girona (APTA-UdG) with the collaboration of
several universities in Spain. The aim of the project is to highlight the value of the work of
preserving ecosystem services directly linked to the processes of social mobilization for the
defense of the territory. It also has its own protocol for analyzing territorial conflicts based on
social mobilization for the preservation of the Mediterranean coast.
Once the search for information had been carried out, the data were entered using the
collaborative mapping tool Survey123 of ArcGIS Online (ESRI) by solving questions in a
form based on the MOVxPAIMED protocol, to make a concrete study of the problems,
resolving questions such as where, which entities have participated in the movements, the
intensity, the relevance, in which decade it arises, and the result of the mobilization. This
application has enabled the creation of geo-referenced maps of the conflicts, allowing them
to be represented in a visual and statistical way, related to different topics, such as the
entities involved, the year they started, the final result, the intensity, etc.
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Ordenació del territori -- Catalunya -- Baix Empordà
Desenvolupament sostenible -- Catalunya -- Baix Empordà
Ambientalisme
Conflictes socials -- Baix Empordà
Paisatge -- Protecció -- Catalunya -- Baix Empordà
Recursos naturals -- Conservació -- Catalunya -- Baix Empordà
Environmentalism -- Catalonia -- Baix Empordà
Regional planning -- Catalonia -- Baix Empordà
Sustainable development -- Catalonia -- Baix Empordà
Landscape protection -- Catalonia -- Baix Empordà
Conflictos territoriales en el Baix Empordà 1970-2022: evolución y rol en la preservación del paisaje y del patrimonio natural
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/233542023-09-29T05:30:41Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
López Mascarreras, Elena
2023-09-20T12:43:30Z
2023-09-20T12:43:30Z
2023-02
http://hdl.handle.net/10256/23354
Forward osmosis (FO) has emerged as a promising membrane technology for water treatments and other industry applications due to their characteristic, it’s low energy requirements and ability to operate without high temperature or pressure values. Unlike the more commonly used membrane technology, reverse osmosis, which relies on hydraulic pressure, forward osmosis uses the osmotic pressure as its main driving force, making it a more energy-efficient option.
This study focuses on the fabrication and rear characterization of polymeric forward osmosis membranes with the aim of improving their efficiency and selectivity. Achieving the fabrication of a membrane with great salt rejection and avoiding as much possible fouling and concentration polarization effects, typical of this type of membranes.
The organic membranes were fabricated using various polymers through phase inversion and interfacial polymerization methods with a polysulfone (Psf) support layer and a polyamide selective layer respectively. Resulting in two-layers asymmetric membranes, with a thin selective layer over a thicker support layer. The thickness of the support Psf layer was varied to investigate its effect on membrane properties.
These were then characterized by measuring their water flux and permeability, salt rejection and morphology, using various techniques, including scanning electron microscopy (SEM), water flux and conductivity measurements.
The results of the study revealed a well-structured support layer, with a uniform and finger-like porous morphology and good mechanical resistance. However, there were encountered issues with polyamide layer adhesion, water flux and permeability, which are critical factors in membrane purpose. The experimental results indicate that the polyamide layer is not homogeneous, as evidenced by the high permeability to water and passage of salts. Moreover, during the flux test, a significantly low flux was observed in FO, indicating the possibility of polarization concentration effect in the support layer.
In summary, the study achieved good fabrication results for the support layer, indicating a favourable structure, but further improvement is needed for the polyamide selective layer to optimize the membrane's fabrication methods and make it a more viable option for FO applications
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Osmosi
Aigües residuals -- Plantes de tractament
Aigües residuals -- Depuració
Reactors de membrana
Osmosis
Sewage -- Purification
Sewage disposal plants
Membrane reactors
Forward osmosis membranes fabrication and characterization
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/233552023-09-20T12:59:40Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Bo Castellà, Mar
2023-09-20T12:56:40Z
2023-09-20T12:56:40Z
2023-02
http://hdl.handle.net/10256/23355
Exotic species pose a serious threat to the conservation of native species and natural ecosystems; they are one of the main components of global change. Of special attention is the mosquitofish (Gambusia holbrooki), considered as one of the 100 worst invasive species worldwide. It was introduced to the Iberian Peninsula for biological control of mosquito larvae (i.e. to fight against malaria) in 1921. One of the characteristics that surely explains the great invasive success of the mosquitofish is its phenotypic plasticity, since it allows the ecological niche to expand, especially after a process of migration, colonization or disturbance. However, there are very few studies that focus on phenotypic plasticity or morphometry in the context of biological invasions, and the information available on shrimp is practically nil. For this reason, the aim of this work is to study the morphological changes or phenotypic plasticity of the shrimp in two different environmental conditions. The individuals were captured using different capture techniques (ganglins and the “salabre”), photographed and analyzed with the help of TPS and R software. The condition analysis showed significant differences between the two capture sites, with an increase in condition in Riet Vell (pond) for both males and females. In addition, morphological changes were observed in relation to the place of capture. The main changes were located in the area of the trunk of the caudal peduncle and mouth. The individuals captured in the river showed a greater proportion of the caudal area, while those captured in Riet Vell showed a mouth in a higher position. These changes can be explained by the differences in hydrology and availability of prey in the two environments
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Gambusia holbrooki -- Morfologia -- Catalunya -- Ebre, Delta de l'
Gambusia holbrooki –Morphology -- Catalonia -- Ebro River Delta (Spain)
Invasions biològiques
Biological invasions
Efecte de l’ambient en la plasticitat fenotípica de la gambúsia (Gambusia holbrooki)
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/235802023-11-06T11:30:07Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Curient Nicolau, Joan
2023-11-06T11:30:07Z
2023-11-06T11:30:07Z
2023-06
http://hdl.handle.net/10256/23580
Since the industrial revolution, human activities have modified climate and weather; the most
notable example is global warming caused by the emission of greenhouse gases. The formation of
condensation trails, as a result of gases resulting from combustion in jet aircraft turbines, is one of
the most visible and well-known modifications. Indeed, the high density of flights at high levels of the
troposphere facilitates the formation of these trails, depending on the environmental conditions,
which, if they persist over time, are considered anthropogenic clouds.
This work aims to study the condensation trails in the sky of Girona, from a double perspective. On
the one hand, to obtain a quantification of the frequency of this phenomenon. On the other hand, to
verify the conditions in the atmosphere that allow (or not) the formation of contrails. With these
objectives in mind, a review of the existing literature on the conditions under which these
condensation trails are produced and their effects has been carried out. An exhaustive review of the
images provided by a hemispherical vision camera of the Environmental Physics Group (GFA) of the
University of Girona, corresponding to 10 years (2013-2022), has also been carried out. Finally, these
observations have been combined, with atmospheric conditions in the upper troposphere, given by
radiosondages performed in the city of Barcelona by the Meteorological Service of Catalonia (SMC)
and with information from commercial flights that passed over Girona during some days of the year
2022.
The results indicate that a little more than one in four days, at some time of the day, condensation
trails can be observed in the sky of Girona. It is more common in winter than in summer, and in the
morning or midday than in the afternoon. On the other hand, all observations of contrails (or their
absence) correspond correctly with the passage of aircraft at levels where the environmental
conditions, given by the Schumann diagram, justify their formation (or non-existence)
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Aire -- Contaminació -- Catalunya -- Girona
Gasos -- Aspectes ambientals -- Catalunya -- Girona
Gasos d’ efecte hivernacle -- Catalunya -- Girona
Condensació
Avions de reacció -- Aspectes Ambientals -- Catalunya -- Girona
Air -- Pollution -- Catalonia -- Girona
Gases -- Environmental aspects -- Catalonia -- Girona
Greenhouse gases -- Catalonia -- Girona -- Catalonia -- Girona
Condensation
Jet planes – Pollution -- Catalonia – Girona
Anàlisi de les condicions meteorològiques que afavoreixen la formació de deixants de condensació
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/235812023-11-06T11:46:09Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Gironella Fernandez, Enric
2023-11-06T11:46:09Z
2023-11-06T11:46:09Z
2023-06
http://hdl.handle.net/10256/23581
Water is an increasingly limited resource, and predictions for the coming years present a stage where access to this resource will become more and more challenging. For this reason, there is a growing interest in water reuse, and new natural technologies are being developed that we will see expanding in the future.
This study focuses on the wine industry, specifically La Vinyeta winery, which has a great responsibility in using water efficiently and sustainably. During this bachelor's thesis, an assessment of the quality and quantity of water generated in the winery was conducted. The following parameters were analyzed: COD, BOD, TSS, total nitrogen, nitrates, nitrites, ammonia, total phosphorus, phosphates, and pH. Water meters in different areas of the winery were also monitored to determine the amount of water used and obtain inflow values to the wastewater treatment plant. Finally, the performance of each stage of the winery and cheese factory's wastewater treatment plant was evaluated, and possible improvement strategies were proposed.
The results showed a low reduction in parameters such as organic matter, nitrogen, phosphorus, and pH. However, during the sampling months, a leakage problem was detected in the constructed wetland, which, once resolved, improved the plant's performance, significantly reducing most of the analyzed parameters. It could be stated that the wastewater treatment plant's operation is not optimal, but thanks to this study, weak points and some issues have been identified, which, if managed properly, can help improve the plant's performance and allow for the reuse of a significant portion of the generated wastewater.
Furthermore, different improvement proposals were studied to address the malfunctioning of the various stages of the treatment plant. It has been observed that despite the existence of many different types of natural wastewater treatment technologies, there is still a lack of research towards the natural treatment of these waters
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Viticultura -- Catalunya -- Alt Empordà -- Aspectes ambientals
Vinicultura -- Catalunya -- Alt Empordà -- Aspectes ambientals
Viticultura -- Catalunya -- Alt Empordà -- Aspectes ambientals
Formatgeries -- Catalunya -- Alt Empordà -- Aspectes ambientals
Cellers -- Catalunya -- Alt Empordà -- Aspectes ambientals
Aigües residuals -- Plantes de tractament -- Catalunya -- Alt Empordà
Viticulture -- Catalonia -- Alt Empordà -- Environmental aspects
Wine and wine making -- Catalonia -- Alt Empordà -- Environmental aspects
Cheese shops -- Catalonia -- Alt Empordà -- Environmental aspects
Sewage disposal plants -- Catalonia -- Alt Empordà
Seguiment i optimització de la planta de depuració d’aigües residuals del celler i formatgeria La Vinyeta
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/235822023-11-06T11:53:09Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Múrria Cano, Georgina
2023-11-06T11:53:09Z
2023-11-06T11:53:09Z
2023-06
http://hdl.handle.net/10256/23582
In this project, we analyse the “Nudges” in conceptual way- an aspect that is expected to modify people’s behaviour in a predictable way, without using imposition. The tool that we approach here is expected to increase the citizens engagement in order to face the current water problems. This way, we designed several “Nudges” in order to achieve our main goals – reduction in water consumption; implementation and acceptance of the use of reclaimed water, and regulation of water bills. In addition, to go one step further, we also interviewed a leader from the water industry as a means to get a different view and perspective on the issue that we are dealing with in this project
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Aigua – Consum --Aspectes psicològics
Elecció (Psicologia)
Decisió, Presa de
Consumidors -- Conducta
Educació del consumidor
Nudges
Water consumption -- Psychological aspects
Choice (Psychology)
Decision-making
Consumer education
Ús dels nudges com a eina de suport front a l’emergència hídrica
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/235852023-11-06T14:54:11Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Pla Baranera, Maria
2023-11-06T14:54:11Z
2023-11-06T14:54:11Z
2023-06
http://hdl.handle.net/10256/23585
This study collects the evaluation of the project “Va de Plàstics?”, which was carried out in March 2023
in the school FEDAC Pare Coll Vic thanks to the “Programa educatiu de medi ambient” of the local
government of Vic.
In order to carry out the evaluation properly, the evaluation methodology was planned before the beginning
of the project. The first part of this evaluation focuses on the evaluation of the impact of the project on
students’ learning; secondly, it evaluates the satisfaction of both students and teachers, the materials and
documents used throughout the project, as well as the development. The third part is based on Medir (Medir
et al., 2016) and the evaluation is strictly focused on the detection of the key principles of environmental
education, and therefore, has a much more direct approach towards environmental education.
The combination of the various evaluation strategies aims to obtain a wide range of varied results, and thus
draw conclusions as carefully and objectively as possible.
The obtained results show a clear impact of the project on the students; a positive evaluation in terms of
satisfaction on the part of both students and teachers, as well as a positive evaluation of the materials, the
documents and the development of the project. Finally, it is concluded that two of the key principles of
environmental education based on Medir (Medir et al., 2016) are developed correctly throughout the
project, while other five need to be improved and the rest can be improved
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Educació ambiental -- Catalunya -- Vic
Plàstics – Reciclatge -- Catalunya -- Vic
Environmental education -- Catalonia -- Vic
Plastics -- Recycling -- Catalonia -- Vic
Fundació Educativa Dominiques Anunciata Pare Coll – Catalunya -- Vic
Avaluació del projecte d'educació ambiental "Va de plàstics?" del programa educatiu de medi ambient de la ciutat de Vic. Escola FEDAC Pare Coll Vic
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/235862023-11-06T15:04:47Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Siles Alves, Cristina
2023-11-06T15:04:47Z
2023-11-06T15:04:47Z
2023-06
http://hdl.handle.net/10256/23586
In this study, a mycological inventory was conducted in the landscaped areas of the Montilivi Campus at the University of Girona, with the aim of understanding the structure, composition, and diversity
of the fungal community in the area. Despite being a relatively unknown group, fungi play a crucial
role in ecosystems and provide important ecosystem services to humans.
To develop the inventory, nine plots distributed across the entire campus were sampled, covering a
total area of 12,736 m2 and ranging in elevation from 98 to 116 meters above sea level. Species
identification was carried out on-site, with the abundance of each species also recorded. Only
species that raised doubts were collected and analyzed in the laboratory, minimizing the impact on
the sampled environment. Field data was collected in Excel and supplemented with information on
the family and ecology of each species. Subsequently, all inventoried species were compiled in a
table along with relevant information, and different sector graphs were created to represent the
representation of each family and ecological role (saprobes, mycorrhizal, or parasitic) within the
fungal community. A list with relevant information on the most abundant species in each group was
also provided. The abundance of individuals and their dominant ecology in each sampled plot was
analyzed. Finally, the fungal community's diversity in the area was assessed using the
Shannon-Wiener index (H') and Evenness (E).
The inventory includes 24 species, with one belonging to the Ascomycota group and the rest to the
Basidiomycota group. The dominant family in the study area, accounting for over half of the
community, is Psathyrellaceae. In terms of ecological roles, saprophytes represent 83% of the
community, while mycorrhizal species are in the minority, and no parasites were found. Although the
results may not be considered truly representative of the community, as data collection over a longer
period or the use of high-throughput sequencing techniques on soil samples from the study area
would be required, and the environmental conditions, such as precipitation, have not been favorable
for fungal fruiting, diversity indices indicate that the fungal community in the study area is in a good
state in terms of diversity
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Mycology -- Inventories -- Catalonia -- Girona
Micologia – Inventaris -- Catalunya -- Girona
Universitat de Girona. Campus Montilivi
Inventari micològic de les zones enjardinades del Campus Montilivi
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/235872023-11-06T15:16:14Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Soler i Fiol, Clara
2023-11-06T15:16:14Z
2023-11-06T15:16:14Z
2023-06
http://hdl.handle.net/10256/23587
Sports pavilions are key facilities for the development of physical activity and sports, but they also represent a challenge in terms of sustainability. This study focuses on analyzing the sustainability of the Municipal Pavilion of Fontajau in Girona, with a particular emphasis on the analysis of electricity and water consumption. The study has been conducted at two levels: a more general one that allows observing the consumption evolution over the years, and a more detailed one to analyze consumption patterns on an hourly basis.
In terms of water consumption, a significant decrease has been observed from 2019 to the present, initially caused by the COVID-19 pandemic. Since 2021, there has been a progressive increase, reaching current levels ranging between 250 m³ and 400 m³ per month. At a more detailed level, it has been observed that both tap and shower usage, as well as toilet tank consumption, are concentrated during daylight hours and range between 2 and 6 m³ per day. However, on days with high attendance, such as basketball matches, consumption increases considerably.
Regarding electricity, an annual pattern is observed, where peak consumption occurs during winter due to heating usage and matches. Conversely, minimum consumption is observed during summer months when activities inside the pavilion significantly decrease. At a more detailed level, it is observed that although consumption never reaches zero, the highest consumption and peaks are concentrated during daylight hours. Unlike water, electric consumption is less dependent on the number of people in the pavilion and more influenced by the activities carried out, as well as the space and duration involved.
Based on this analysis, recommendations have been proposed to improve the sustainable management of the facilities, considering both cost and water savings. For water, the following measures have been suggested: leakage and loss detection, water-saving mechanisms, reuse of graywater, and utilization of rainwater. On the other hand, for enhancing the use of electricity resources in the facilities, the following measures have been proposed: energy audits and management systems, use of renewable sources, and installation of energy-efficient lighting and appliances
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Pavelló Municipal Girona-Fontajau
Instal·lacions esportives -- Catalunya -- Girona
Instal·lacions esportives -- Estalvi d'energia
Energia elèctrica -- Estalvi -- Catalunya -- Girona
AIgua -- Conservació -- Catalunya -- Girona
Electric power -- Conservation -- Catalonia -- Girona
Water conservation -- Catalonia -- Girona
Sports facilities -- Energy conservation
Estudi dels consums d’aigua i energia en el pavelló municipal de Fontajau Girona. Situació actual i propostes de millora
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/243372024-02-06T12:57:22Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Gibaja Musachs, Carla
2024-02-06T12:42:59Z
2024-02-06T12:42:59Z
2023-07
http://hdl.handle.net/10256/24337
During the month of August 2022, auditory and visual censuses were carried out in two stretches one kilometer apart located in the community of San Rafael, Peru. There is no previous data on the birds in this place and, therefore, the study carried out is of great relevance. Two areas of study have been differentiated; the forest area and the anthropogenic area, located next to the Amazon River. The relationship between the effect of anthropization of the habitat, the richness and the composition of species has been evaluated based on the data collected in the censuses. It was possible to register a total
of 1340 individuals distributed in 40 families and 118 species, in the forest area the composition of birds is made up of 32 families, 79 species and 500 individuals. The most abundant species is Aratinga weddelli, representing 10% of the total with 50 individuals recorded out of a total of 500. On the other hand, in the anthropized area, there are a total of 35 families, 89 species and 840 individuals have been counted. The most abundant species is Brotogeris sanctithomae, representing 11.9%, 100 individuals registered of a total of 840. The results show that the area with more human disturbance have more families, more species and more individuals compared to the less impacted forest area. It has been shown that the more effort in sampling, the greater the accumulation of species. A greater number of species are counted in the morning, but there are species that are only observed in the afternoon, for this reason this time slot cannot be ignored, but the effort in the number of samples can be reduced because the accumulation stabilizes with few samplings.
Significant differences in richness have been found between both areas. In the anthropized zone, despite having greater richness, the community is dominated by a few species, and many species are found in very minority abundances. On the other hand, in the forest area, the abundance is maintained more gradually. There is a moderate overlap in existing bird species between the two areas, however, there are exclusive species for each habitat. It has also been detected that both areas present a moderate-high diversity. To conclude, a total of 7 alimentation types were registered, the most abundant in number of species in the two areas was the insectivore and the omnivore.
So, the results have shown a positive effect of the anthropization of the habitat in this specific case
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Ocells -- Efecte de l'home -- Perú
Ocells -- Hàbits i conducta -- Perú
Birds -- Effect of human beings on -- Peru
Birds -- Behavior -- Peru
Efecte de l’antropització de l’hàbitat sobre les comunitats d’ocells a la comunitat de San Rafael, Loreto - Perú
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/243382024-02-06T12:50:06Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Ibarrondo i Gomila, Júlia
2024-02-06T12:50:06Z
2024-02-06T12:50:06Z
2023-07
http://hdl.handle.net/10256/24338
Extensive livestock farming in the mountains of the Pyrenees helps to preserve the mosaic landscape, which is characterised by a high degree of biodiversity. But the gradual abandonment of this livestock practice in recent decades favors the process of deforestation of pastures and the consequent substitution of the mosaic landscape. Meadow habitats, which are typical of the landscape, are replaced by bushes and forests that have a lower degree of biodiversity. This paper makes a diagnosis of the state of the subalpine pastures of the Parc Natural de l’Alt Pirineu, specifically in the Isil Mountains in two different study areas. The intention is to carry out floristic inventories of subalpine meadows and to evaluate the ecological status through bioindicator species, as well as to determine how the degree of forest cover influences the aforementioned florístic composition and the biodiversity of high mountain pastures. The results indicate that the study area has a negative trend in population, livestock and livestock holdings. Intensive grazing in the Salau area has negative effects on the richness and diversity of species. Even so, the area of Clavera, characterized by a greater woodland, presents an impoverishment in terms of the floristic population. Although there is a significant relationship between study areas and richness and between study areas and diversity, no significant relationship has been found between richness and diversity and the degree of matting. In the Salau area there is a lower presence of plants characteristic of meadows in favor of a greater covering of ruderal plants and others due to the intensification of grazing. The coating of plants characteristic of meadows and brushes does change according to the degree of matting. In the case of pollinating and nutritional plants, it is shown that there is a negative relationship in terms of the degree of maturation. Taking into account the nutritional value of each plant for the animals, there is a greater cover of forbias and grasses in the meadows. Finally, it has been observed with the meadow evaluation protocol that in the Clavera area all the meadows have a level of floristic quality better than Salau. Therefore, this work demonstrates the importance of keeping livestock pressure appropriate to the area and at the same time preventing the abandonment of high mountain areas as livestock meadows. In this way, the mosaic landscape is favoured and, therefore, a great biodiversity is maintained
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Bestiar -- Cria i desenvolupament -- Catalunya -- Pallars Sobirà
Pastures -- Explotació -- Catalunya -- Pallars Sobirà
Ecologia de les pastures -- Catalunya -- Pallars Sobirà
Livestock -- Breeding -- Catalonia -- Pallars Sobirà
Range management -- Catalonia -- Pallars Sobirà
Pasture ecology -- Catalonia -- Pallars Sobirà
Estudi dels efectes de la gestió ramadera en les pastures dels comunals d’Isil, Pallars Sobirà
info:eu-repo/semantics/bachelorThesis
oai:dugi-doc.udg.edu:10256/243392024-02-06T12:54:37Zcom_10256_8023com_10256_2945col_10256_11212RC2openaire_dataRC1CIRAXRC4RC3driveropenaireMD2MD1recolecta
Len Lleonart, Adrià
2024-02-06T12:54:37Z
2024-02-06T12:54:37Z
2023-07
http://hdl.handle.net/10256/24339
Springs are elements of the environment with significant importance in many fields of
knowledge. They are indicators of the quantity and quality of the water stored in the subsurface.
The study of the flow rate and physicochemical parameters of springs allows for determining
the characteristics of groundwater and studying its evolution over a period of time through the
calculation of a water balance. The Guilleries massif is part of the large Montseny-Guilleries granite aquifer, which has a large number of springs and hydro-meteorological conditions that favor high groundwater recharge. With global warming, the average annual precipitation falling on the massif is decreasing, and the average temperature is increasing. These two variables together lead to a significant reduction in the water that infiltrates the subsurface and comes out through the springs.
To understand the hydrological functioning of the Guilleries springs and determine their current
state, a combined water balance of twelve springs and their respective drainage basins has
been conducted. Different future scenarios have also been estimated using climate projections
for precipitation and temperature for the period 2031-2050, along with various options
regarding soil cover types. The results show a high correlation between spring flow rates and precipitation, but temperatures and precipitation distribution are also important factors as they influence the amount of infiltration that occurs. As for the future scenarios, a clear decrease in water
available for the subsurface compared to the average period of 1961-1990 is observed, with a
slight decrease when open spaces increase. These results lead to the conclusion that there is a clear relationship between the changes in the hydro-meteorological regime caused by global warming and the state of springs and groundwater bodies. Although this decrease is inevitable, it can be slightly mitigated by reducing forest covers and increasing open spaces, thus reducing evapotranspiration and increasing infiltration
cat
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 International
Guilleries (Catalunya : Massís)
Fonts -- Catalunya
Hidrogeologia -- Catalunya
Fountains -- Catalonia
Hidrogeologia -- Catalonia
Fonts de les Guilleries: hidrologia, relació amb recàrrega subterrània i escenaris de futur
info:eu-repo/semantics/bachelorThesis