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Experimental testing of two urban stressors on freshwater biofilms

dc.rights.licenseopenen_US
hal.structure.identifierEcosystèmes aquatiques et changements globaux [UR EABX]
dc.contributor.authorVRBA, Romain
hal.structure.identifierInstitut National de la Recherche Scientifique [Québec] [INRS]
dc.contributor.authorLAVOIE, Isabelle
hal.structure.identifierPlateforme Bordeaux Metabolome
hal.structure.identifierEcosystèmes aquatiques et changements globaux [UR EABX]
dc.contributor.authorCREUSOT, Nicolas
hal.structure.identifierEcosystèmes aquatiques et changements globaux [UR EABX]
dc.contributor.authorEON, Mélissa
hal.structure.identifierEcosystèmes aquatiques et changements globaux [UR EABX]
dc.contributor.authorMILLAN-NAVARRO, Débora
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorFEURTET MAZEL, Agnes
hal.structure.identifierEcosystèmes aquatiques et changements globaux [UR EABX]
dc.contributor.authorMAZZELLA, Nicolas
hal.structure.identifierEcosystèmes aquatiques et changements globaux [UR EABX]
dc.contributor.authorMOREIRA, Aurélie
hal.structure.identifierUniversité du Québec à Montréal = University of Québec in Montréal [UQAM]
dc.contributor.authorPLANAS, Dolors
hal.structure.identifierEcosystèmes aquatiques et changements globaux [UR EABX]
dc.contributor.authorMORIN, Soizic
dc.date.accessioned2025-04-07T08:55:20Z
dc.date.available2025-04-07T08:55:20Z
dc.date.issued2024-07
dc.identifier.issn0166-445Xen_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/206007
dc.description.abstractEnAquatic ecosystems and their communities are exposed to numerous stressors of various natures (chemical and physical), whose impacts are often poorly documented. In urban areas, the use of biocides such as dodecyldimethylbenzylammonium chloride (DDBAC) and their subsequent release in wastewater result in their transfer to urban aquatic ecosystems. DDBAC is known to be toxic to most aquatic organisms. Artificial light at night (ALAN) is another stressor that is increasing globally, especially in urban areas. ALAN may have a negative impact on photosynthetic cycles of periphytic biofilms, which in turn may result in changes in their metabolic functioning. Moreover, studies suggest that exposure to artificial light could increase the biocidal effect of DDBAC on biofilms. The present study investigates the individual and combined effects of DDBAC and/or ALAN on the functioning and structure of photosynthetic biofilms. We exposed biofilms in artificial channels to a nominal concentration of 30 mg.L–1 of DDBAC and/or ALAN for 10 days. ALAN modified DDBAC exposure, decreasing concentrations in the water but not accumulation in biofilms. DDBAC had negative impacts on biofilm functioning and structure. Photosynthetic activity was inhibited by > 90% after 2 days of exposure, compared to the controls, and did not recover over the duration of the experiment. Biofilm composition was also impacted, with a marked decrease in green algae and the disappearance of microfauna under DDBAC exposure. The integrity of algal cells was compromised where DDBAC exposure altered the chloroplasts and chlorophyll content. Impacts on autotrophs were also observed through a shift in lipid profiles, in particular a strong decrease in glycolipid content was noted. We found no significant interactive effect of ALAN and DDBAC on the studied endpoints.
dc.language.isoENen_US
dc.subject.enALAN
dc.subject.enBioaccumulation
dc.subject.enBiocide
dc.subject.enBiofilm
dc.subject.enLipids
dc.subject.enPhotosynthetic efficiency
dc.title.enExperimental testing of two urban stressors on freshwater biofilms
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.aquatox.2024.106972en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalAquatic Toxicologyen_US
bordeaux.page106972en_US
bordeaux.volume272en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamEAen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-04613841
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccCC BYen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Aquatic%20Toxicology&rft.date=2024-07&rft.volume=272&rft.spage=106972&rft.epage=106972&rft.eissn=0166-445X&rft.issn=0166-445X&rft.au=VRBA,%20Romain&LAVOIE,%20Isabelle&CREUSOT,%20Nicolas&EON,%20M%C3%A9lissa&MILLAN-NAVARRO,%20D%C3%A9bora&rft.genre=article


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