Properties of some components of phytocenoses on the territory of tectonic knots (Arkhangelsk region)

The purpose of the study was to determine the de-gree of impact of tectonic knots on plant resources in the taiga zone in the Arkhangelsk Region. The research problems were to reveal the distinctions in chemical composition of fruits of cowberry and lichen, in macro- and microstructure of wood of fir-tree and pine on the territory of Velsko-Ustyansky tectonic knot and beyond its limits. The researches were conducted in 2014-2016 in wood types, characteristic for the region (bilberry, cowberry, sphagnum). Test areas in the center of knot and beyond its limits were selected and put on the most similar forestry taxation indicators. width of a year gain, percent of late wood, thickness of cellular walls of late and early wood of a pine and fir-tree were determined by the standard techniques; the productivity of berries of cowberry and the contents of ascorbic acid in them and biochemical indicators of lichen of Usneaflorida L. Reli-able distinctions were revealed: in pine wood in the share of late wood and thickness of cellular walls; on the productivity and the content of ascorbic acid in cowberry fruits, and also in biochemical indicators of lichen of Usneaflorida L., tectonic knot growing in the center and in the suburbs. The results of the research showed that the knots of crossing of tectonic dislocations considera-bly influenced the properties of some components of phytocenosis, including those having important resource value. Most likely, it is shown through various mainte-nance of microelement structure of the soil, the distinc-tion in the quantity and character of rainfall and other environment changing in the territories of tectonic knots.