[On the problem of biodiagnostics under conditions of radioactive contamination].

The possibilities of biodiagnostics methods (bioindication and bioassay) have been analyzed for conditions of radioactive contamination of natural ecosystems components. The prospects of using biodiagnostics data to address some practical radioecology problems are discussed. The data on dynamics of long-term indicators in the ecosystems contaminated after the Chernobyl accident are shown. The authors have formulated a number of provisions relating to the accumulative bioindication for structural components of forest ecosystems (arboreal and herbaceous vegetation, mosses, lichens, higher fungi).