Contribution to the study of psammophile coastal region of tlemcen (oran-algeria): Phytosociological aspects and mapping

Objects: This study is devoted to the analysis of the vegetation of the coastal dunes of the region of Tlemcen. Results were obtained on these in general, including the phytosociological and topographic aspect. Methods: is to choose stations of the coastline of the region of Tlemcen from Rechgoune Beach until Marsat Ben M'hidi which determine vegetation of coastal psammophytes These Results: allowed us to individualize different phytosociological classes (Cakiletea maritimae, Ammophiletea) for species with the beach, (Therobrachypodietea, Quercetea ilicis) in bright dune and fixed dune. The class of the Cakiletea maritimae and Ammophiletea include species of the embryonic dunes. The Therobrachypodietea class includes vivid dune species. Quercetea ilicis class brings together the most advanced dune species and more fixed. Using the phytosociological and phytodynamiques data, we were able to understand the evolution of this vegetation and its diversity. Conclusion: establish a mapping test different of course with their floristic cortege coastal dunes and highlight the different phytosociological units.