METHOD OF DIFFERENTIATION OF MESOTROPHIC AND EUTOTROPHIC CONDITIONS OF FRESH-WATER STAGNANT BASINS Russian patent published in 2009 - IPC A01H13/00 C12R1/89 

FIELD: biotechnology.

SUBSTANCE: invention relates to biotechnology, particularly to ecology, and can be applied in nature-conservation activity for control of water quality of fresh-water stagnant basins. Method is realised by registration of three biotic and abiotic indices, calculation of trophic index and determining of basin ecological condition by trophic index value, as biotic indices, quantity of algae of Crucigenia tetrapedia (Kirchn.) W. Et G.S. West, Scenedesmus quadricauda (Turp.) Breb. var. quadricauda, Trachelomonas volvocinopsis Swir. are registered, as abiotic indices, average air temperature in ten days, quantity of sediment per ten days and transparence of water in basin, index of trophicity are calculated by definite formula. If value of trophicity index is less or equal 3.6 basin is considered to be mesotrophic, and if value of trophicity index is higher than 3.6 - eutotrophic.

EFFECT: application of claimed method allows fast obtaining of objective and reliable information about ecological condition of fresh-water stagnant basin basing on limited number of tests, which considerably reduces work, time and finance expenditure during research.

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