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Influence of grazing on triclosan toxicity to stream periphyton

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dc.contributor.author Guasch i Padró, Helena
dc.contributor.author Ricart Viladomat, Marta
dc.contributor.author López-Doval, Julio C.
dc.contributor.author Bonnineau, Chloé
dc.contributor.author Proia, Lorenzo
dc.contributor.author Morin, Soizic
dc.contributor.author Muñoz Gràcia, Isabel
dc.contributor.author Romaní i Cornet, Anna M.
dc.contributor.author Sabater, Sergi
dc.date.issued 2016-12
dc.identifier.issn 0046-5070 (versió paper)
dc.identifier.issn 1365-2427 (versió electrònica)
dc.identifier.uri http://hdl.handle.net/10256/13476
dc.description.abstract Interactions between emerging contaminants and other drivers of community structure and function are poorly known. We used laboratory microcosms to investigate the single and combined effects of grazing and triclosan toxicity on the structure and function of stream periphyton. Grazing alone strongly reduced algal biomass, but also reduced oxidative stress and increased periphyton productivity and phosphorus (P) uptake capacity. This suggests that grazed algal communities can compensate for reduced biomass by enhanced growth after being released from grazing. Triclosan exposure (11.6 ± 1.1 μg L−1) reduced the detoxification capacity and P-uptake capacity of periphyton and altered diatom taxonomic composition. This indicates that triclosan at environmentally relevant concentrations affects the capacity of periphyton to remove dissolved nutrients and to cope with toxicant mixtures commonly occurring in streams. Triclosan exposure and grazing pressure had negative synergistic effects on algal size-class distribution and diatom mortality, since the effects of triclosan were higher than expected when periphyton was subject to grazing. Periphyton exposed to toxic substances such as triclosan had a lower capacity to cope with grazing than unexposed communities, because toxicity can limit algal regrowth after release from grazing and promote the loss of less abundant species. This synergism may have important implications because grazing pressure will magnify the negative effects of toxicants on community structure and ecosystem functions such as primary production and nutrient cycling cat
dc.description.sponsorship This study was supported by the European Commission through the project Modelkey (Project 511237-2 GOCE). Additional funds were provided by the European Keybioeffects Project (MRTN-CT-2006-035695), VIECO (009/RN08/011), SCARCE (Consolider-Ingenio 2010, CSD2009- 00065) and Fluvialmultistress (CTM2009-14111-CO2-01) and MPCUdG2016/120 cat
dc.format.mimetype application/pdf cat
dc.language.iso eng cat
dc.publisher Wiley cat
dc.relation MICINN/PN 2010-2012/CTM2009-14111-C02-01 cat
dc.relation.isformatof Reproducció digital del document publicat a: http://dx.doi.org/10.1111/fwb.12797 cat
dc.relation.ispartof © Freshwater Biology, 2016, vol. 61, núm. 12, p. 2002-2012 cat
dc.relation.ispartofseries Articles publicats (D-CCAA) cat
dc.rights Tots els drets reservats cat
dc.subject Contaminants emergents en l'aigua cat
dc.subject Emerging contaminants in water cat
dc.subject Toxicologia ambiental cat
dc.subject Environmental toxicology cat
dc.title Influence of grazing on triclosan toxicity to stream periphyton cat
dc.type info:eu-repo/semantics/article cat
dc.rights.accessRights info:eu-repo/semantics/closedAccess cat
dc.embargo.terms Cap cat
dc.type.version info:eu-repo/semantics/publishedVersion cat
dc.identifier.doi http://dx.doi.org/10.1111/fwb.12797
dc.contributor.funder Ministerio de Ciencia e Innovación (Espanya) cat

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