Experimental warming differentially influences the vulnerability of phototrophic and heterotrophic periphytic communities to copper toxicity
| Autor: | Stéphane Pesce, Anne-Sophie Lambert, Soizic Morin, Arnaud Foulquier, Marina Coquery, Aymeric Dabrin |
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| Přispěvatelé: | RiverLy (UR Riverly), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Ecosystèmes aquatiques et changements globaux (UR EABX), Laboratoire d'Ecologie Alpine (LECA ), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Microbiology (medical)
ENZYME enzymes lcsh:QR1-502 0211 other engineering and technologies Heterotroph 02 engineering and technology extracellular enzymatic activities 010501 environmental sciences Biology 01 natural sciences Microbiology Freshwater ecosystem lcsh:Microbiology biofilm microbial ecotoxicology medicine 14. Life underwater Periphyton freshwater Original Research 0105 earth and related environmental sciences 021110 strategic defence & security studies photosynthesis TOXICITE Phototroph Ecology Aquatic ecosystem pollution-induced community tolerance (PICT) Copper toxicity CUIVRE toxicity medicine.disease 6. Clean water bioaccumulation multi-stress Microbial population biology 13. Climate action copper ECOTOXICOLOGIE MICROBIENNE [SDE]Environmental Sciences biofilms Microcosm EAU DOUCE |
| Zdroj: | Frontiers in Microbiology Frontiers in Microbiology, Frontiers Media, 2018, 9, pp.1424-1438. ⟨10.3389/fmicb.2018.01424⟩ Frontiers in Microbiology, Vol 9 (2018) |
| ISSN: | 1664-302X |
| DOI: | 10.3389/fmicb.2018.01424⟩ |
| Popis: | International audience; Aquatic ecosystems are generally subjected to multiple perturbations due to simultaneous or successive combinations of various natural and anthropogenic environmental pressures. To better assess and predict the resulting ecological consequences, increasing attention should be given to the accumulation of stresses on freshwater ecosystems and its effects on the vulnerability of aquatic organisms, including microbial communities, which play crucial functional roles. Here we used a microcosm study to assess the influence of an experimental warming on the vulnerability of phototrophic and heterotrophic periphytic communities to acute and chronic copper (Cu) toxicity. Natural periphytic communities were submitted for 4 weeks to three different temperatures (18, 23, and 28°C) in microcosms contaminated (at about 15 µg L-1) or not with Cu. The vulnerability of both phototrophic and heterotrophic microbial communities to subsequent acute Cu stress was then assessed by measuring their levels of sensitivity to Cu from bioassays targeting phototrophic (photosynthetic activity) and heterotrophic (β-glucosidase and leucine aminopeptidase extracellular enzymatic activities) microbial functions. We postulated that both the increase in temperature and the chronic Cu exposure would modify microbial community structure, thus leading to changes in the capacity of phototrophic and heterotrophic communities to tolerate subsequent acute exposure to Cu. Our results demonstrated that the influence of temperature on the vulnerability of phototrophic and heterotrophic microbial communities to Cu toxicity can vary greatly according to function studied. These findings emphasize the importance of considering different functional compartments and different functional descriptors to better assess the vulnerability of periphyton to multiple stresses and predict the risks induced by multiple stressors for ecosystem balance and functioning. |
| Databáze: | OpenAIRE |
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