CONCENTRATIONS OF LONG-LIVED ARTIFICIAL RADIONUCLIDES IN THE MOSS-LICHEN COVER OF TERRESTRIAL ECOSYSTEMS IN THE URAL-SIBERIAN REGION

Data are presented concerning Sr-90 and Cs-137 concentrations in taxon omically different lichens and mosses, and concentrations of radionucl ides in the moss-lichen cover of terrestrial communities studied in th e Ural-Siberian Region. Radioactive contamination of lichens and mosse s is determined by long-lived radionuclides arriving with global fallo ut from the atmosphere. The dynamics of Sr-90 and Cs-137 concentration s in moss-lichen communities is shown. The data obtained can be used f or the general assessment of the radiological situation in the Ural-Si berian Region and for long-term radiation monitoring in the northern t erritories.