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Experimental testing of two urban stressors on freshwater biofilms.
Vrba, Romain; Lavoie, Isabelle; Creusot, Nicolas; Eon, Mélissa; Millan-Navarro, Débora; Feurtet-Mazel, Agnès; Mazzella, Nicolas; Moreira, Aurélie; Planas, Dolors; Morin, Soizic.
Afiliación
  • Vrba R; INRAE, UR EABX, 50 avenue de Verdun, 33612 Cestas cedex, France; INRS-ETE, 490 rue de la Couronne, Québec, QC G1K 9A9, Canada.
  • Lavoie I; INRS-ETE, 490 rue de la Couronne, Québec, QC G1K 9A9, Canada.
  • Creusot N; INRAE, UR EABX, 50 avenue de Verdun, 33612 Cestas cedex, France.
  • Eon M; INRAE, UR EABX, 50 avenue de Verdun, 33612 Cestas cedex, France.
  • Millan-Navarro D; INRAE, UR EABX, 50 avenue de Verdun, 33612 Cestas cedex, France.
  • Feurtet-Mazel A; Univ. Bordeaux, UMR CNRS 5805 EPOC-OASU, F-336120 Arcachon, France.
  • Mazzella N; INRAE, UR EABX, 50 avenue de Verdun, 33612 Cestas cedex, France.
  • Moreira A; INRAE, UR EABX, 50 avenue de Verdun, 33612 Cestas cedex, France.
  • Planas D; UQAM, GRIL-Département des sciences biologiques, 141 Avenue du Président-Kennedy, Montréal, QC H2 × 1Y4, Canada.
  • Morin S; INRAE, UR EABX, 50 avenue de Verdun, 33612 Cestas cedex, France. Electronic address: soizic.morin@inrae.fr.
Aquat Toxicol ; 272: 106972, 2024 Jul.
Article en En | MEDLINE | ID: mdl-38815346
ABSTRACT
Aquatic 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.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Biopelículas / Agua Dulce Idioma: En Revista: Aquat Toxicol Asunto de la revista: BIOLOGIA / TOXICOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Biopelículas / Agua Dulce Idioma: En Revista: Aquat Toxicol Asunto de la revista: BIOLOGIA / TOXICOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Países Bajos