Objectives : analyze the people relations with their " milieux " under the perspective of the vulnerability and the adaptation of coastal communities potentially exposed to the impacts of climate change. The research articulates in two modules dedicated to the analysis of the vulnerability : the hazard and the perception of the risks. Interdisciplinary, it requires a redistribution of collaborations between disciplines : social sciences and human naturalists. The architecture of the project is a methodological experiment. It will ultimately contribute to the reflexion and the information of adaptation and risk management public policies.