SPECIES COMPOSITION AND ABOVE-GROUND PHYTOMASS RESERVES OF STEPPE COMMUNITIES
There are presented results of investigating flora of the Aginskiy Buryat Autonomous Okrug, Transbaikalia, which includes stipa-fescue-cinquefoil and filifolium-forb communities as well as solonchak steppe. Phytocenoses are widely represented by forage, medicinal and ornamental plants. The data on species composition and biological productivity of above-ground phytomass are given. A level of total phytomass reserves of plant communities is determined by biological characteristics of dominants and codominants. A feeding diet for animals is based on graminoids, legumes, sedge, aster, mustard and, to a certain extent, goosefoot families. The above-ground phytomass productivity depends on not only natural-climatic conditions and species composition but also impacts of anthropogenic factors.