Forest formations in Zounzounkan have undergone two major periods of their degradation. Anthropogenic pressures have contributed to 63, 26 % degradation of the forest cover between 1990 and 2000, while climate risks of erosion contributed to 16,68%. Between 2000 and 2010, major anthropogenic pressures are expressed by baresoil with a relative contribution of 31,65% to the degradation of forest cover, 19,14% for climate risks represented by erosion. From vegetation matrix transition, we notice that between 1990 and 2000, woodlands and wooded savannahs have been replaced by the tree and shrub savannah (37,98 %), grassland and saxicolous (20,41 %), the mosaics of crops and fallow (32,11 %), bare soil (3,85 %), wetlands (1,45 %), and soil altered by erosion (4,20 %). During this period, tree and shrub savannas were replaced by woodland and savanna woodlands (26,91 %), grassland and saxicolous (30,54 %), mosaics of crops and fallow (15,34%), bare soil (31,65%), wetlands (5.94 %) and soils altered by erosion (16,54 %). From 2000 to 2010, woodlands and woodlands have been replaced by the tree and shrub savannah (29,27 %), grassland and saxicolous (4,73 %), mosaics of crops and fallow (10,83%), bare soil (31,15 %), wetlands (7,34%), and soil altered by erosion (16,68 %). During this same period, tree and shrub savannas were replaced by woodland and savanna woodlands (16,10%), grassland and saxicolous (34,43%), mosaics of crops and fallow (16,64%), bare soil (18,80%), wetlands (10,98%) and soils altered by erosion (19,14%).
