The following is a list of ecoregions in Western Sahara, according to the Worldwide Fund for Nature (WWF).
Terrestrial ecoregions Palearctic Mediterranean forests, woodlands, and scrub Mediterranean acacia-argania dry woodlands and succulent thickets
Deserts and xeric shrublands Atlantic coastal desert North Saharan steppe and woodlands
Freshwater ecoregions Dry Sahel Permanent Maghreb Temporary Maghreb
Marine ecoregions Saharan Upwelling
References Burgess, Neil, Jennifer D’Amico Hales, Emma Underwood (2004). Terrestrial Ecoregions of Africa and Madagascar: A Conservation Assessment. Island Press, Washington DC. Spalding, Mark D., Helen E. Fox, Gerald R. Allen, Nick Davidson et al. "Marine Ecoregions of the World: A Bioregionalization of Coastal and Shelf Areas". Bioscience Vol. 57 No. 7, July/August 2007, pp. 573–583. Thieme, Michelle L. (2005). Freshwater Ecoregions of Africa and Madagascar: A Conservation Assessment. Island Press, Washington DC.