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Toxicity effects of an environmental realistic herbicide mixture on the seagrass Zostera noltei

dc.rights.licenseopenen_US
hal.structure.identifierLaboratoire Ecologie Fonctionnelle et Environnement [LEFE]
dc.contributor.authorDIEPENS, Noël
hal.structure.identifierLaboratoire Ecologie Fonctionnelle et Environnement [LEFE]
dc.contributor.authorBUFFAN-DUBAU, Evelyne
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBUDZINSKI, Hélène
ORCID: 0000-0003-1028-9154
IDREF: 070478090
hal.structure.identifierLaboratoire Ecologie Fonctionnelle et Environnement [LEFE]
dc.contributor.authorKALLERHOFF, Jean
hal.structure.identifierLaboratoire Ecologie Fonctionnelle et Environnement [LEFE]
dc.contributor.authorMERLINA, Georges
hal.structure.identifierLaboratoire Ecologie Fonctionnelle et Environnement [LEFE]
dc.contributor.authorSILVESTRE, Jérome
hal.structure.identifierLaboratoire Environnement Ressources d'Arcachon [LERAR]
dc.contributor.authorAUBY, Isabelle
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorTAPIE, Nathalie
hal.structure.identifierLaboratoire Ecologie Fonctionnelle et Environnement [LEFE]
dc.contributor.authorELGER, Arnaud
dc.date.accessioned2024-05-29T10:59:21Z
dc.date.available2024-05-29T10:59:21Z
dc.date.issued2017-03
dc.identifier.issn0269-7491en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/200125
dc.description.abstractEnWorldwide seagrass declines have been observed due to multiple stressors. One of them is the mixture of pesticides used in intensive agriculture and boat antifouling paints in coastal areas. Effects of mixture toxicity are complex and poorly understood. However, consideration of mixture toxicity is more realistic and ecologically relevant for environmental risk assessment (ERA). The first aim of this study was to determine short-term effects of realistic herbicide mixture exposure on physiological endpoints of Zostera noltei. The second aim was to assess the environmental risks of this mixture, by comparing the results to previously published data. Z. noltei was exposed to a mixture of four herbicides: atrazine, diuron, irgarol and S-metolachlor, simulating the composition of typical cocktail of contaminants in the Arcachon bay (Atlantic coast, France). Three stress biomarkers were measured: enzymatic activity of glutathione reductase, effective quantum yield (EQY) and photosynthetic pigment composition after 6, 24 and 96 h. Short term exposure to realistic herbicide mixtures affected EQY, with almost 100% inhibition for the two highest concentrations, and photosynthetic pigments. Effect on pigment composition was detected after 6 h with a no observed effect concentration (NOEC) of 1 μg/L total mixture concentration. The lowest EQY effect concentration at 10% (EC10) (2 μg/L) and pigment composition NOEC with an assessment factor of 10 were above the maximal field concentrations along the French Atlantic coast, suggesting that there are no potential short term adverse effects of this particular mixture on Z. noltei. However, chronic effects on photosynthesis may lead to reduced energy reserves, which could thus lead to effects at whole plant and population level. Understanding the consequences of chemical mixtures could help to improve ERA and enhance management strategies to prevent further declines of seagrass meadows worldwide.
dc.language.isoENen_US
dc.subject.enZostera noltei
dc.subject.enHerbicides
dc.subject.enMixture toxicity
dc.subject.enEffective quantum yield
dc.subject.enPigments
dc.subject.enGEOF
dc.title.enToxicity effects of an environmental realistic herbicide mixture on the seagrass Zostera noltei
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.envpol.2016.12.021en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalEnvironmental Pollutionen_US
bordeaux.page393-403en_US
bordeaux.volume222en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-03159711
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Environmental%20Pollution&rft.date=2017-03&rft.volume=222&rft.spage=393-403&rft.epage=393-403&rft.eissn=0269-7491&rft.issn=0269-7491&rft.au=DIEPENS,%20No%C3%ABl&BUFFAN-DUBAU,%20Evelyne&BUDZINSKI,%20H%C3%A9l%C3%A8ne&KALLERHOFF,%20Jean&MERLINA,%20Georges&rft.genre=article


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