Revegetation of Dark Coniferous Taiga at the Site of Second Growth of Light Coniferous-Leaf Woods in the South-Eastern Pre-Baikal

Zonal and height belt differentiations of the environmental parameters determine forms and types of forest changes while forming natural systems of any hierarchy. Under the conditions of climate changes, shifting of natural (geographical) environments or height belts as definite environments is possible, with the structural differentiation of the whole biosphere. Determination of consequences of such changes is a problem for modern biogeography, biocenology, geobotanics and ecology as for knowledge systems on vegetation formation and development under concrete physical geographical conditions. According to this case we are presenting the results of the study of the forest development in some areas of Lake Baikal basin. It was observed that the dark coniferous taiga is forming everywhere on the site of the second growth of the light coniferous-leaf woods due to secular forests dynamics, to climate changes and partly to decrease of anthropogenic impact for last decades in the region.