fishing is less regulated (in the past only two tribes were permitted to fish) and fish stocks in the rivers are declining. In a similar way lack of control is also causing over-grazing. Finally the Selingue Dam and other water control projects affect the levels and seasonal behaviour of the rivers. See also River delta Flooded grasslands and savannas References Further reading Link includes both volumes. Volume 2 includes 8 maps. The L'Institut de recherche pour le développement site also has pdf files containing individual chapters. Also published in French with the title Le Niger: une Artère vitale. Gestion efficace de l’eau dans le bassin du Haut Niger. External links Inner Floodplains of Africa River deltas of Africa Flooded grasslands and savannas Afrotropical ecoregions Ecoregions of Mali Freshwater ecoregions of Africa Grasslands of Mali French West Africa Massina Empire Mopti Region Ramsar sites in Mali Landforms of Niger