Haroni S. A. auteur aut IRD Alifriqui M. auteur aut IRD Simonneaux V. auteur aut IRD text journalArticle eng text/pdf born digital access Wetlands are a very important universal heritage; in the Moroccan High Atlas mountains the geomorphology and the slopes evolution determine the existence of the numerous projecting ledges of pozzines on plateaus and oozing. This is particularly the case in Oukaimeden site located at 75 km south of Marrakesh. These wet grasslands have been developed on small surface areas supported by soils water accumulation; and close to the sources and on some banks constitute wetlands of high floristic richness, which makes them very coveted pastures by local populations. These wet pastures are highly sensitive to climatic factors. Recent climatic changes, the anthropic and pastoral pressures and the global environmental changes, affect these zones at the level of their structure (areas, soil characteristicsaEuro broken vertical bar) and their ecological functions. In the Oukaimeden plateau, the use of aerial photography made it possible to carry out a detailed follow up of the hydraulic adjustments (dam construction in the 1970s) as well as the setting up of new adjustments (tracks, paths, drain channel) on the structure and functioning of these grasslands. specialized 082 18 1 167-189 2009 0960-3115 https://www.documentation.ird.fr/hor/fdi:010046083 10.1007/s10531-008-9465-6 0960-3115 [F B010046083] https://www.documentation.ird.fr/hor/fdi:010046083 https://www.documentation.ird.fr/intranet/publi/2009/compl1/010046083.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-07-08 2017-08-23 fdi:010046083 fre