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.