Case studies of 75 permanent sample plots examine the directions of species composition change in different tree formations in case of normal evolution of biocoenoses and mass spruce decline. In case of natural development of forest biocoenoses, only on 5 plots of total 75 species composition of new tree generations is similar to that of the upper tree layer. On other 5 plots, the restoration of conditionally indigenous mixed spruce and lime forests proceeds. In all other cases, the forests develop towards the formation of broad-leaved communities with the predomination of lime. The expansion of maple in the undergrowth layer is observed on some plots. The change from spruce to lime forests is the most pronounced in the stands where the decline of spruce element occurred after bark beetle invasion.
To the trends in the forest forming process in northeastern Moscow region