EFFECTS OF ACCUMULATION OF TRACE ELEMENTS FOOD ORGANISMS OF LAKE BALKHASH ON THEIR BIOMASS
The influence of accumulation of heavy metals by benthic organisms of the Lake Balkhash on their biomass is investigated. The analysis of the results of long-term monitoring testifies that accumulation of toxicants in the bentonites is closely connected with variability of their concentration in water and ground substratum. Microelements are accumulated in chitinized covers of the highest Crustacean rather than in shell rock. Dominants on accumulation in fodder organisms are the zinc and copper accumulated by bentonites in number of 6.93-15.7 mg/kg with the maximum values to 28.5-94.0 mg/kg in the most polluted reservoir sites - the bay Bertys and the gulf Torangalyk. The comparative dynamics of the total accumulation of trace elements benthic organisms in five water basins of Kazakhstan. Negative correlation dependence between biomass of soil forms of the benthos and accumulation of microelements in them is revealed. The typical close positive connection between biomass of some benthic organisms and the content of heavy metals in them is established. Quantitative development of the highest Crustacea has direct dependence - the higher the biomass, the higher the content of metals in the organisms.