ABSTRACT
Basically all biogeocenoses that exist on the surface of Earth, including nondisturbed steppes, are influenced by man. In the Ukraine all that remain are a few unique nondisturbed steppes with total territory less than 1% of the whole steppe zone (Tkachenko et al., 1998). Natural steppe ecosystems are composed of unique and specific plant species; they have an abundant animal and microbial world. Detailed analysis of natural reserves as ecological and biological models of biocenoses became very important with the many anthropogenic changes imposed on the environment.
