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Communication Dans Un Congrès Année : 2008

Research infrastructures for long term experiments and monitoring in freshwater ecosystems facing anthropogenic and natural pressures.

Résumé

In the general context of local anthropogenic pressures and global change, a major challenge is to maintain the long-term ecological integrity of freshwater ecosystems (lakes, rivers and streams, floodplains, marshes). The understanding of the evolution of ecological functioning of these complex ecosystems under the pressure of external forces is now a central focus. To progress on this knowledge we need adequate data, and especially long term datasets (both monitoring and experimental), but also cross-site experiences and monitoring, and multidisciplinary approaches to (1) define trends and dynamics in the evolution of the systems, (2) identify the regulatory factors and processes involved in this evolution, (3) construct and test conceptual and forecasting models of functioning. We present in this talk two types of research infrastructures managed by INRA ; these tools are dedicated to long term experiments and monitoring : (1) mesocosms facilities for ecotoxicological research used to acquire elements of knowledge and understanding on the effects induced by the exposure to xenobiotics (pesticides); (2) two Environmental Research Observatories (Small Coastal Rivers ERO and Great Alpine Lakes ERO) organized to study the long term evolution and the functioning of these complex ecosystems under the influence of local and global changes. The small coastal rivers ERO concerns 3 hydrologic networks in which are studied the responses of various diadromous fish species (and their habitat) to changes in water temperature and suspended solid/sediment fluxes. The Great Alpine Lakes ERO monitoring of three deep Alpine lakes (Bourget, Léman, Annecy) is organized to follow the evolution of ecosystems indicators and to observe the structuring impacts of various factors among which : warming, fish introductions, fishing management, changes in nutrients inputs. The cognitive and operational objectives, the organization, the sites characteristics and networking are presented for each of these three research infrastructures. Among the perspectives, we highlight two main points: - the development of sites-network at an international level to improve the relevance of findings and observations, - the identification of relevant shared research questions to structure this networking.
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Dates et versions

hal-01453784 , version 1 (02-02-2017)

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  • HAL Id : hal-01453784 , version 1
  • PRODINRA : 33359

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Isabelle Domaizon, Didier Azam, Jean-Luc J.-L. Baglinière, Philippe Gaudin, Thierry Caquet. Research infrastructures for long term experiments and monitoring in freshwater ecosystems facing anthropogenic and natural pressures.. ANAEE Workshop 2008, Sep 2008, Paris, France. 2 p. ⟨hal-01453784⟩
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