Home – Home – Jornals – Contemporary Problems of Ecology 2010 number 5

Comparative anаlysis of fish associations in the upper Tom' from the zone of the discharge of warmed water from electric power stations and from background regions was carried out. An increase in the number and biomass of alien species was revealed in the regions subjected to thermal pollution: the fraction of invaders is 19 % of the total ichthyomass, 41 % of the total number of fish, and 25 % of the species diversity of fish. The fish capacity of the mountain taiga region of the upper Tom' with elevated water temperature is 2-4 times larger than the values characterizing the major river-bed and corresponds to the capacity level of the lowland rivers in the southern part of West Siberia, which is connected with eutrophication.