Past and present limnological investigations in Uganda: an overview

The limnological investigations in Uganda freshwaters which were started in the 1920s looked into: the origins, the changing geological and climatic factors which gaverise to the characteristic inland waters; the primary production; the constituent small aquaticorganisms and their ecology; and their bordering swamps. Most of them were formed immediately after the formation of the great Western rift valley.Almost all the inland waters in Uganda are typical tropical freshwaters which, because of their relative shallowness, experience rather frequent wind stirrings and therefore nutrient circulation which would make them relatively productive. Many physical, biological and chemical factors come into play to finally determine this.The present investigations continue to bridge the gaps which were left and also to collect the baseline data needed to later manage, monitor and control any possible pollution risks.