To satisfy their vital needs and to face consequences of the global change, the vegetals and animals species need high-quality and conected naturals habitats. CERES plans to implement actions to maintain andor improve these networks of ecological continuities to improve the biodiversity of several types of forests and riparians habitats ecosystems from the SUDOE’s area. The partners (scientifics and managers of natural areas) develop a shared method which allows to characterize the quality and the ecological connectivity and realize actions of management to improve the biodiversity, with a particular attention to the raising awareness of the public.