XVI International Botanical Congess
The assessment of flora's restoration potential is necessary to ascertain a degree of its transformation and prognostication of its further development. This potential is determined by the flora=s species response to different types of disturbance (natural and anthropogenous) and their role in restoration changes of vegetation. A lot of indices are used for its evaluation, the most important being a species successional status. It is defined by its place and phytocenotic role in the whole complex of rows of digressive and restoration vegetation changes. In the south-east of Ukraine the synanthropous flora of pastures is an anthropotolerant version of the regional flora and embraces flora of steppe, meadow and saline communities which are under heavy pasqual pressure. On the basis of the developed scheme of main species habitats and classification of a successional status of the flora studied the restoration potential of the most distributed ravine steppe pastures on the black soils of the Ukrainian south-east has been established. In the flora of this type of pastures species with a successional status - differentiators of final stages (38%) - prevail, which testifies to a significant degree of communities transformation. A considerable number of species - differentiators of initial stages (20%) witness about the potential for restoration.