Larvae of Ephemeroptera group as bioindicators of water quality of the South Ural rivers

The paper contains the analysis of a possibility to use green drakes larvae of Ephemeroptera group for bioindicator researches during environmental monitoring of the South Ural rivers. Collection and analysis of types constancy of green drakes larvae was carried out in 2005 to 2016 in 17 state water posts on the territory of the South Ural rivers. As chemical characteristics the author used the index of content of compounds of manganese, nickel and iron, oil products, phenols, nitrogen ammonium, coppers, zinc, chemical oxygen consumption (COC), biological oxygen consumption in 5 days (BOC₅), sulfates, chlorides, nitrite nitrogen in river waters. In total constancy dynamics of 13 species larvae of mayflies was analyzed. The author has made a list of constant, additive and casual types of representatives of Ephemeroptera group. Significant correlative dependences between constancy of larvae of species of mayflies with a number of hydrochemical indexes are revealed statistically. The paper contains regression models for the constancy forecast of larvae of green drakes depending on concentration of the pollutant.