To assess the extent of eutrophication, the French Ministries of Ecology and Agriculture entrusted the CNRS with delivering a Collective Scientific Expert Report (ESCo) in partnership with the National Institute for Agricultural Research (INRA), IFREMER1 and the National Research Institute of Science and Technology for Environment and Agriculture (IRSTEA). The results of this work were presented at a conference.
The origins of eutrophication are well known. Population growth, urban concentration, industrialization and intensive farming have all led to an increase in the flow and concentrations of nutrients in the aquatic ecosystems. However the analysis of 4000 bibliographic references by around forty scientists from a wide spectrum of disciplines makes the whole picture clearer. “Compared with previous decades, we have discovered increasingly widespread sources of pollution. This generates very long response times from the ecosystems and ensuing consequences that may be a long way from the original pollution sources,” points out Gilles Pinay, who led the project. “We are also highlighting the negative effect of climate change on this phenomenon, the result of which is that returning to the original conditions is now virtually impossible.”
While the ESCo report highlights the emergence of increasingly precise models, it also emphasises the need for integrated and adaptative pollution management. It suggests ways to improve aquatic ecosystem quality assessment, in particular as part of the EU Water Framework Directive.
Restitution de l’expertise scientifique collective sur l’eutrophisation
COLLOQUE DE RESTITUTION ESCO EUTROPHISATION