Table 1.

Freshwater ecoregions of West Africa investigated and their attributes Ecoregions codes from Abell et al. (2008).

Ecoregions	Covered countries
505: Lower Niger–Benue	Mali, Burkina Faso, Niger, Bénin, Nigeria, Cameroon, Chad
506: Niger Delta	Nigeria,
507: Upper Niger	Guinea, Mali, Ivory Coast, Burkina Faso
508: Inner Niger Delta	Mali, Mauritania
513: Mount Nimba	Guinea, Ivory Coast
514: Eburneo	Ivory Coast, Burkina Faso
515: Ashanti	Ivory Coast, Ghana
516: Volta	Ivory Coast, Mali, Burkina Faso, Ghana, Togo, Bénin
517: Bight Drainage	Ghana, Togo, Bénin, Nigeria,
518: Northern Gulf of Guinea Drainages	Nigeria, Cameroon
519: Western Equatorial Crater Lakes	Cameroon