Phenotypic resposes of the silver birch (Betula pendula Roth) in the conditions of anthropogenic influence

Phenotypic reaction of plants to changing growing conditions are accommodative. These changes are marked by the example of the leaves and needles of woody plants. The results of studies that have been carried out on the territory of the Ufa industrial center in the network of permanent sample plots with birch (Betula pendula Roth) in August 2015. The calculations of the integral index of the stability of birch stands as the impact of industrial areas, as well as on a constant load of recreation areas. Phenotypic birch reactions are not specific. In terms of industrial pollution of the environment and against the background of a pronounced recreation load asymmetry indices are expressed to a greater extent. Birch has a high adaptive capacity and refers to a group of resistant species of wood in relation to the action of extreme natural and man-made factors. To effectively analyze and interpret the phenotypic variability of birch it is advisable to use a long-term research results throughout the growing season.