Phytoplankton Composition in Shallow Water Ecosystems: Influence of Environmental Gradients and Nutrient Availability
dc.contributor.author
dc.date.accessioned
2017-02-17T10:59:46Z
dc.date.available
2017-02-17T10:59:46Z
dc.date.issued
2011-05-13
dc.identifier.isbn
978-84-87867-76-7
dc.identifier.uri
dc.description.abstract
Environmental gradients caused by hydrological changes, whether natural or maninduced,
affect the planktonic taxonomic and functional composition in shallow water
ecosystems. In this sense, our aim was to find out the main variables or variable ratios
that are the driving forces of the major phytoplankton taxonomic groups in
Mediterranean coastal lagoons. For this purpose, 11 waterbodies were choosen, 6 of
them in Empordà wetlands and 5 in the Doñana National Park, looking for
representative conditions along a gradient of salinity and nutrient content. Two surveys
were conducted in each waterbody (January and May 2007), after that the
phytoplankton composition (chemotaxonomic composition) and also several physical
and chemical environmental variables were analyzed. Two methodological approaches
were used and compared: a first approach with a log (x+1) variable transformation and a
second one where variables were transformed using the compositional data analysis
(CoDa) techniques introduced by Aitchison (1986). When the raw data approach and
the CoDa approach analysis (RDA) were compared, the results obtained were similar
with regard to explained variance and also interpretation. The CoDa approach was
characterized by the introduction of a new environmental driving factor, the bacterial
biomass, whose ratio with the peptidase enzyme activity became significant. In this
sense, the CoDa approach contributed to improving the biological interpretation of the
phytoplankton distribution based on the raw analysis
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Universitat Politècnica de Catalunya. Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE)
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Reproducció digital del document publicat a:
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© International Workshop on Compositional Data Analysis (4th: 2011: Sant Feliu de GuÍxols, Girona). CODAWORK 2011: International Workshop on Compositional Data Analysis, hold on May 9-13rd. 2011, Sant Feliu de Guíxols, Girona
dc.relation.ispartofseries
Llibres / Capítols de LLibre (D-CCAA)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Phytoplankton Composition in Shallow Water Ecosystems: Influence of Environmental Gradients and Nutrient Availability
dc.type
info:eu-repo/semantics/bookPart
dc.rights.accessRights
info:eu-repo/semantics/openAccess