The influence of alien species of hydrobionts on the structural-functional organization of the Saratov reservoir ecosystem

There was examined the influence of alien hydrobionts in the Ponto-Caspian fauna complex on structural-functional organization of ecosystems in Saratov water basin. Alien species naturalized successfully and caused the complication of ecosystems structure in Saratov water basin thus resulting in its higher homeostatic. The increase of hydrobionts biodiversity (due to alien species) influenced the functioning of the water basins ecosystem thus changing earlier existing food chains. В The given data proves the beginning of significant functional transformations in the water basins ecosystem.