The reason behind this high productivity and endemism may be the relatively stable nature of precipitation.Spriggs, A. 2001.(AT0709) The Karoo apparently does not experience drought regularly, so even though the area is technically a desert, regular winter rains provide enough moisture to support the region's interesting plant community. Another feature of the Kalahari, indeed many parts of Namibia, are inselbergs, isolated mountains that create microclimates and habitats for organisms not adapted to life in the surrounding desert matrix.
The reason behind this high productivity and endemism may be the relatively stable nature of precipitation.Spriggs, A. 2001.(AT0709) The Karoo apparently does not experience drought regularly, so even though the area is technically a desert, regular winter rains provide enough moisture to support the region's interesting plant community. Another feature of the Kalahari, indeed many parts of Namibia, are inselbergs isolated mountains that create microclimates and habitats for organisms not adapted to life in the surrounding desert matrix.