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Communication Dans Un Congrès Année : 2015

Influence of temperature increase on the response of phototrophic biofilms to a chronic exposure to copper

Influence de la température sur la réponse de communautés périphytiques phototrophes au cuivre

Résumé

Agricultural rivers are highly affected by metal pollution, with copper being frequently detected. However, surface water pollution must be viewed in a context of global change, and aquatic systems are generally subjected to multi-stress conditions, due to multiple chemical and/or physical pressures. Among the various environmental factors, a special attention should be paid to climatic changes, which can lead to rising temperatures. In lotic ecosystems, periphytic biofilms assume key ecological functions such as primary production and nutrient cycling. Indeed, even if effects of metals on microbial communities are relatively well known, there is a lack of data about the possible interactions between temperature and metal stress. Accordingly, we evaluated in microcosms the influence of temperature increase on the response of biofilms to copper exposure. The response of phototrophic communities was evaluated both in terms of structure (biomass, distribution of algal groups, diatomic composition) and function (photosynthetic potential).Our results showed that Cu bioavailability and resulting effects on biofilms were affected by temperature, confirming the need for studying such interaction to better understand the ecotoxicological impact of metals in multi-stressed environments.
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Dates et versions

hal-02602284 , version 1 (16-05-2020)

Identifiants

Citer

A.S. Lambert, A. Dabrin, Soizic Morin, A. Foulquier, J. Gahou, et al.. Influence of temperature increase on the response of phototrophic biofilms to a chronic exposure to copper. 2015 Aquatic Sciences Meeting (ASLO), Feb 2015, Granada, Spain. pp.37. ⟨hal-02602284⟩
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