Аннотация:During the last decades, antropogenic impact on nature has become global, which brought about destraction, drastic transformation and change in natural ecosystems. The most drastic effect was that on steppe ecosystems favorable for human life and agriculture.AS a result multi-faceted human impact over the vast territory of Europe, Western Siberia, Kazakstan, Altai, the steppes have been replaced by antropogenic ecosystems. The remaining parts of steppes show changes in floristic diversity, including overgrowth of rangelands with, decrease in the value of useful product, changes in the structure of community and plant cover.