Prognosis of the State of Aquatic Animal Populations under Conditions of Disturbed Ionic Composition of Water |
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| Authors: | Kalinkina N M |
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| Institution: | (1) Institute of Water Problems of the North, Karelian Research Center, Russian Academy of Sciences, pr. A. Nevskogo 50, Petrozavodsk, 185030, Russia |
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| Abstract: | In the crustacean Eudiaptomus gracilisSars, relationships between mortality (D) and the ratio of main cations (R, the ratio of the sum of potassium and sodium equivalent concentrations to the sum of calcium and magnesium equivalent concentrations) were studied. The calculated regression equation D= 315 – 355/Rwas used for predicting the state of E. gracilispopulation in Lake Poppalijarvi (Karelia) polluted with mining waste. At R< 0.47, the population will survive; at R> 1.53, its extinction should be expected. The results of hydrobiological observations on Lake Poppalijarvi confirmed the prognosis based on the equation. |
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| Keywords: | population planktonic crustaceans freshwater ecosystems mining mineral pollution |
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