Article

Fortunately, it is a long time since the plant diversity of Corsica has been thoroughly investigated, and global action plans have started already several years ago. The following diversity values are given here for taxa and habitats, but also the rate of endemism (5.2-12.2 %), rarity degrees (43.5 % of the flora), some aspects of genetic diversity, as well as importance of certain keystone species and other highly informative species. The threats are analysed, particularly the impact of agricultural decline, of tourism, and of the presence of xenophytes (17 % of the flora). Consequently, a.global management pian was elaborated, in eollaboration with multiple organisms and institutions, and partially within the framework of European programs. These aetions are linked to the protection, the management and the rehabilitation of the most remarkable sites, mainly those considered as priority habitat of the European "habitat direetive" (dunes, temporary ponds, pozzines, bogs, etc.) Wetlands are once again among the most sensitive environrnents. For rare endemie speeies ex situ (seed banks, handling of germination and eulture) and in situ (strengthening of the populations but also reintroductions, partieularly for Anchusa crispa, Rouya polygama, Lippia nodiflora and Naufraga balearica) actions are carried ono These present programs involve numerous partners. The success of this experience will be brought to light in the future.