Investigated biological productivity in natural ecosystems of the Western section Pricelessly the lowlands of Dagestan. The quantitative characteristics of phytocenoses in the "soil -plant" system were obtained by method Titlyanova A. A. The natural and anthropogenic dynamics of the production process in the summer period (2014-2016 years) was analyzed. The study of species composition and total reserves of above-ground phytomass of steppe phytocenoses was carried out. As a result of

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... s of indicators of changes in the composition, structure and productivity of plant communities in two sample plots, the dynamics of vegetation cover was revealed. In a comparative perspective shows the topological changes on the meadow and chestnut soils causing changes in plant communities.