Dreissenidae (Mollusca: Bivalvia) in benthos of the Kiev Reservoir and factors influencing their distribution.
It has been found that mass development of Dreissena polymorpha was observed in the Kiev Reservoir only several years later after its construction in 1965. Dreissena bugensis belonging to typical invaders was registered in this water body six years later. With time D. polymorpha was partially displaced by D. bugensis, especially in deep-water biotopes. The main factors responsible for mass development of Dreissenidae (especially of D. bugensis) in the Kiev Reservoir include the similarity of its hydrochemical indices with those registered in the lower reservoirs of the Dnieper cascade, and also effective ecological and physiological adaptations of these mollusks.