Dynamics of the fish population of the high floodplain lake of the Oka River basin by the example of the Lake Erus, Ryazan Oblast, Russia

Abstract

The long-term dynamics of the fish population was studied in the forest lake of the high floodplain of the Oka River, located in the southeastern Meshchera Lowlands. The maximum ecological capacity of the lake is fifteen fish species and the minimum, three fish species. The dynamics of the composition and species structure of the fish community depends on a number of factors. The most significant factors are the physico-chemical characteristics of the lake, the level of spring floods, and the interactions between aboriginal and invasive species.