Ecological quality of water of river ecosystems of specially protected natural territories of Belarus and Uzbekistan

Recently, along with the determination of physical and chemical pollution in establishing the quality of surface waters and especially river ecosystems, the biological and, first of all, the hydrobiological component has become increasingly important. The purpose of this work was to assess the ecological quality of river ecosystems in specially protected natural areas of Belarus and Uzbekistan based on the study of the macrozoobenthos community. Alien, rare for Belarus and protected in Europe, species of aquatic organisms were identified at the model stations. In the territory of the both states, a high abundance (from 30 to 80 %) of rheophilic species Plecoptera, Ephemeroptera and Trichoptera, which represent the three most priority indicator groups of aquatic organisms, was noted. Biotic indices were determined and the class of water purity of the rivers of the State landscape reserve “Srednyaya Pripyat”in Belarus and the Ugam-Chatkal State Natural National Park in the territory of Uzbekistan were calculated. In accordance with the EU Water Framework Directive, the ecological water quality at the studied sampling sites can be classified as good and high water purity classes in the territory of the both countries.