Effects of low concentrations of the phenylurea herbicide diuron on biofilm algae and bacteria
dc.contributor.author
dc.date.accessioned
2016-09-19T10:57:24Z
dc.date.available
2016-09-19T10:57:24Z
dc.date.issued
2009-09-01
dc.identifier.issn
0045-6535
dc.identifier.uri
dc.description.abstract
A system of recirculating channels was used in this study to examine the long-term effects (29 d) of environmentally realistic concentrations of the herbicide diuron (from 0.07 to 7 μg L-1) on biofilm communities. The autotrophic activity of biofilms was affected by this herbicide, as reflected by a marked decrease in the photosynthetic efficiency. Diuron exposure also increased chlorophyll-a content and reduced the biovolume of diatom taxa at low concentrations. The effects on bacteria were also remarkable. Bacterial abundance was reduced after a week of exposure to the herbicide at a range of concentrations. Effects were on the number of live bacteria and on the increase in the leucine-aminopeptidase activity. It is suggested that inputs of herbicides to the river ecosystem at low concentrations may cause a chain of effects in the biofilm, which include inhibitory effects on algae but also indirect effects on the relationships between biofilm components. © 2009 Elsevier Ltd. All rights reserved
dc.description.sponsorship
This study was supported by the European Commission project Modelkey (Project 511237-2 GOCE). Additional funds were provided by the European Project Keybioeffects (MRTN-CT-2006-035695) and by the Spanish Ministry of Science and Technology (Project GCL2006-12785/HID) and the VIECO program (009/RN08/011) of the Spanish Ministry of the Environment and Rural and Marine Affairs
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
info:eu-repo/grantAgreement/MEC//CGL2006-12785/ES/USO DEL PERIFITON COMO HERRAMIENTA PARA LA EVALUACION DEL EFECTO DE LOS CONTAMINANTES SOBRE LA ESTRUCTURA Y FUNCION DEL ECOSISTEMA FLUVIAL/
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.chemosphere.2009.06.017
dc.relation.ispartof
© Chemosphere, 2009, vol. 76, p. 1392-1401
dc.relation.ispartofseries
Articles publicats (D-CCAA)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Effects of low concentrations of the phenylurea herbicide diuron on biofilm algae and bacteria
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
011124
dc.contributor.funder
dc.relation.ProjectAcronym