Our paper presents the state of our research on the socio-environmental conditions for the rehabilitation of common biodiversity-CLEVERT Program. The participation of local populations, on a district scale, in the public debates about the maintenance or the restoration of functional ecosystems is now an imperative of public policies. The originality of the program is based on a long term presence on the field, an easy implementation of the protocols and sessions of participative cartography. Our purpose /objective is to understand on what social configurations are based the conservation projects and to assess if the awareness of ecological issues is better taken into account in a context of local empowerment. Our paper has four sections: summarized account of ethno ecological data of the three fields, correlation of social and environmental data, analysis of the favorable factors regarding the co-construction of knowledge, mutual relations amongst the disciplines involved (anthropology, ecology and geography). MOTS CLES Sciences participatives, biodiversité ordinaire, échelle communale, populations locales.