Zooplankton seasonal changes in hightrophic small reservoirs

Features of zooplankton seasonal development in hightrophic reservoirs of woody zone of the Northeast part of European Russia are revealed. It is shown, that in hypertrophic ponds once for a vegetative season there is change of zooplankton dominating complex so, that dynamics of numerosity of all zooplankton has two peaks. In them is observed more simple in comparison with eutrophic lakes trophic structure of planktonic animals. In polytypic reservoirs various in direction of change the zooplankton species diversity during a vegetative season was marked.