Explain about the Serengeti Ecosystem?

The Serengeti ecosystem, one of the most stunning biological communities in the world, was devastated by the introduction of rinderpest from central Asia in the late 19th century. The cascading influences of lowered ungulate population sizes permanently changed the vegetation structure of east Africa, and may have made conditions more suitable for the invasion of tsetse fly vectors of sleeping sickness, further modifying the biological and human communities of the region. Even though these historical effects are still not totally worked out, it is clear that rinderpest that like the related measles virus is subject to extreme "boom and bust" dynamics, could not keep itself within the diverse community of wild ungulates in the Serengeti, but instead was maintained by stable populations of domestic cattle surrounding the wild herds. Along with the development and successful deployment of rinderpest vaccine in domestic cattle, the rinderpest epidemic has been brought within control and ungulate herds have risen to near historic levels, even though some community-level influences of disease may be permanent.