The following is a list of ecoregions in Mauritania, according to the Worldwide Fund for Nature (WWF).

Terrestrial ecoregions

Tropical and subtropical grasslands, savannas, and shrublands

Sahelian Acacia savanna West Sudanian savanna

Flooded grasslands and savannas

Saharan halophytics

Deserts and xeric shrublands

Atlantic coastal desert North Saharan steppe and woodlands Sahara desert South Saharan steppe and woodlands West Saharan montane xeric woodlands

Freshwater ecoregions Dry Sahel Senegal-Gambia Catchments Temporary Maghreb

Marine ecoregions Sahelian 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.