Structure of zoobenthos in the left-bank tributaries of the Lower Amur (Khabarovsk territory)

It is for the first time that the data on benthic communities’ composition and quantitative characteristics, in different types of water streams, is provided. According to their density and biomass, the dominant, subdominant and minor species have been identified. Chironomids make the basis of the invertebrates’ density. The paper presents different biotic indices showing the ecological condition of the left-bank Lower Amur tributaries. These tributaries demonstrate the natural conditions and biodiversity typical for the Russian Far East.