ASSESSMENT OF THE ECOLOGICAL STATE OF WATER OF LAKE ISSYK-KUL BY TROPHIC STATE INDEX (TSI)
Keywords:
eutrophication, ecological assessment of ecosystems, sustainable development, trophic status, pollution of water bodies.Abstract
Implementation of complex assessment of the ecological state of water of Lake
Issyk-Kul and development of effective measures and recommendations on preservation of ecological balance of the lake ecosystem is an actual task of scientists of ecologists of the country. The
country has long-term monitoring analyses, but there is a need for their processing and carrying
out predictive analyses. One of such techniques is the index of trophic level of lake water. Analyses have shown that the trophic status of the lake is subject to temporal and spatial changes. In
general, the lake belongs to oligotrophic water body by trophic status, where the main biogenic
elements are low and do not exceed MAC in water. But, according to the trophic state index, c.
Chok-Tal is assessed as the most polluted region, in the study sites of Balykchy, Cholpon-Ata,
Grigorievka and Bosteri there is a change in the trophic state of aquatic ecosystems from oligotrophic to mesotrophic. This indicates an increase in the concentration of nutrients such as nitrogen
and phosphorus in aquatic systems. The use of the trophic state index allows assessing the water
quality of the lake in a more detailed and comprehensive manner and is recommended for its wide
application by both industrial and research workers.
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