Le Millennium Ecosystem Assessment : anatomie d'une évaluation environnementale globale.

The topic of ecosystem services (ES) has recently become a key reference for international environmental policies (broadly including forest policy, agro-environmental measures, conservation policies, etc.) This concept has been developed gradually in scientific circles in the course of the 1990s. It acquired international recognition with a varied public (policy makers, private sector, NGOs, etc.) during the Millennium Ecosystem Assessment (MA), a global environmental assessment. Since 2005, this notion is experiencing strong growth in different fields such as biodiversity, domestic policies (forestry, agriculture, water, etc.), global change, etc. Our paper is based on the exploratory assumption that the MA process, by organizing the relationship between various networks of scientists and policymakers, has played a key role in the launching and wide dissemination of the ES concept at different scales: international level, domestic policies, local public action mechanisms... It also emphasizes the decisive role played by actors involved in or related to the scientific field in the United States. [ABSTRACT FROM AUTHOR]