Two elements have worked to upset any systems. One is climate, the other humanity. The rapid growth rate of population in the African countries increases dramatically the frequency of fire. This is not a question of a natural process but it is anthropogenic interference into nature. New fire climax vegetation will be created and frequently the degeneration chain will start into progress, especially where the grassland is diminishing.
Fire is a powerful tool in the hands of the farmers.
It should not be forgotten that the livestock is the central element in their culture. The last area of the land is sacrificed for the animals. With regular fires the grass will be regenerated faster and succession to shrub land will be interfered with. The forest is the loser. It is not surprising that wildfire will be seen in the most forest projects as an obstacle.