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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Conservation of the flora and vegetation of the freshwater oligotrophic temporary ponds in mediterranean France (1998)
Auteurs :	Frederic Medail, Auteur ; Henri Michaud, Auteur ; James Molina, Auteur ; Guilhan Paradis, Auteur ; Roger Loisel, Auteur
Type de document :	Article
Dans :	Ecologia Mediterranea (24(2) 1998)
Article en page(s) :	119-134
Résumé :	In Mediterranean France, freshwater, oligotrophic, temporary ponds figure among some of the most interesting ecosystems from a biologic and biogeographic point of view. Following a definition and classification of vernal pools, the geomorphologic or anthropic origins of these formations will be discussed. A survey of areas rich in such pools has allowed us to describe 19 "hotspots" in the regions of Provence-Alpes-Cote d'Azur, Languedoc-Roussillon, and Corsica. The assessment of negative human impact and the imposing number of rare plant in rapid regression (49 taxa) reveal a great need for conservation and management efforts treating the totality of ecocomplexes containing vernal pools. Conservation measures should be undertaken at the metapopulation and landscape levels, with the eventual restoration of sites affected by eutrophisation in mind (Grammont, parts of Roque-Haute...). To better understand their evolution and succession, further analysis and refinement of the dynamics of these plant communities in regard to climatic, edaphic, and anthropic parameters, in normal and disturbed conditions, is needed. Such studies are essential for the management of these fragile ecosystems.

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