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Cite this paper: |
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Alexey P. KUKLIN, Gazhit Ts. TSYBEKMITOVA, Evgenia P. GORLACHEVA, Balzhit B. BAZAROVA, Alexey V. AFONIN. The ecosystem of Lake Kenon: past and present (Transbaikal Territory, Russia)[J]. Journal of Oceanology and Limnology, 2016, 34(3): 507-516 |
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The ecosystem of Lake Kenon: past and present (Transbaikal Territory, Russia) |
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| Alexey P. KUKLIN, Gazhit Ts. TSYBEKMITOVA, Evgenia P. GORLACHEVA, Balzhit B. BAZAROVA, Alexey V. AFONIN |
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| Institute of Natural Resources, Ecology and Cryology, Siberian Branch of Russian Academy Science, Nedorezova, 16a, Chita 672014, Russian Federation |
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| Abstract: |
| Present-day conditions of the Lake Kenon ecosystem are determined by a combination of natural and anthropogenic factors. We have estimated the effects of a complex of factors on the condition of the abiotic environment and on specific biological components in the lake ecosystem. Change in biogenic load has caused an increase in the role of phytoplankton in the general balance of organic matter during the high-water period. Charophytes are the main dominants of bottom vegetation. Anthropogenic load has caused a decrease in both fish species and fish capacity. The lake application as a water reservoir-cooler has influenced the average annual water mineralization (from 420 mg/L to 530.0 mg/L with a maximum 654 mg/L in 1993) and fl uctuations in its hydrochemical composition. The present composition of the lake is sulfate-hydrocarbonate-chloride calcium-sodic-magnesium in character. SO4- content is twice as much as the maximum permissible concentration in fishery waters. Water drainage from an ash disposal area to the lake has caused an increase in chemical-element concentrations including the heavy metals. Hg concentration in Perca fluviatilis muscles is 0.5 μg/g dry wt. Thus, understanding directions in the ecosystem of the water reservoir-cooler under changing hydrological conditions will let us forecast the consequences of new combined heat and power plant operation. |
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| Key words:
water reservoir-cooler of combined heat and power plant (CHP)|hydrochemistry|ichthyofauna|biodiversity|the chemical elements
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| Received: 2014-10-29 Revised: 2015-01-22 |
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