Experimental Warming Differentially Influences the Vulnerability of Phototrophic and Heterotrophic Periphytic Communities to Copper Toxicity

Frontiers in Microbiology
Stéphane PesceAymeric Dabrin

Abstract

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 tempera...Continue Reading

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Citations

May 6, 2020·Environmental Toxicology and Chemistry·Mariem FadhlaouiClaude Fortin
Sep 17, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Paula C FureySylvia Lee
Apr 2, 2021·Microbiology and Molecular Biology Reviews : MMBR·Laurent PhilippotSilke Langenheder
Apr 25, 2021·The Science of the Total Environment·Vincent LaderriereClaude Fortin
Nov 4, 2021·Environmental Science and Pollution Research International·Nicolas CreusotSoizic Morin

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environmental stress
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