The problems of ecological rationing and estimation of water ecosystem conditions on the example of heavy metals

In the article the necessity of working out ecological rationing methodology is considered. The analyses of heavy metals concentration in water ecosystems of the rivers of the Don pool and the Volgograd water basin at various kinds of hydrobionts and their accumulation in organisms (diets including) has been realized. The results can be used to decide on the ecologically admissible concentration of heavy metals in water ecosystems and background levels.