Features of formation of vegetative cover and spatial structure of macrozoobenthos in the conditions of infringement of reservoir hydrological mode (on an example of Beryozovka gulf of Votkinsk pond)

Results of study of aquatic vegetation of gulf Beryozovka of Votkinsk pond (the Udmurt Republic) are presented. It is shown that dike building in the gulf mouth has broken the reservoir hydrological mode that leads to its shallowing. The gulf is revealed to be quickly overgrown with aquatic plants. After having changed the gulf vegetation character the spatial structure of the communities of bottom macroinvertebrates connected with it alters. The revealed changes of the vegetation and the macrozoobenthos structure indicate deterioration of ecological state of the aquatic ecosystem.