Kunchyk T. 3. Anthropogenic transformation of basins and bioproductivity of lake ecosystems of the Western Buh and Prypyat's interfluve (utilization state estimation, management means)

3. The object of investigation: "lake - creek (back-water)" ecosystem in anthropogenic transformed basins of Western Buh - Prypyat interfluvial lakes. Purpose of the researck work: basins and water environment of Western Polyssya region anthropogenic load estimation, drainage area coenosis transformations reasons (peatbog reclamation, soil overdamping, waterworks) clarification and their influence on water quality forming, forage reserve, bioproductivity of lake ecosystems and cenosis species diversity and disturbed region lakes basins ecology state improvement ways determination. The methods of investigation: field technique, laboratory, analytic, theoretic methods of investigation and methods of experimental data mathematical processing. Theoretical and practical result: General assessment of influence of reclamative and hydrotechnical construction in the investigated lakes' basins on infringement ways of seasonal migration of lakes' bioproductivity has been carried out. Ecologically proven lake ecosystems regeneration measures have been developed on the basis of qualitative and quantitative indices. Through Simpson quotient it is established that ecological state of the Rohizna (0,52) lake is 4,5 times, of the Skoryn' (0,08) lake 74,8 times worse than that of the conventionally benchmark Svityaz' Lake (0,93). This fact proves the version of the continuous process of eutrophication in the lakes Rohizna and Skoryn'. The author has developed technological schemes of optimizing the ecosystem "lake-bottomland" in the Western Buh-Prypyat' complex.