Detection of minimum ranges’ area of specific flora account for anthropogenic transformation of the territory

On the basis of «species-area curve» and calculate the L.I. Malyshev representativeness were estimated minimum range’s area of specific flora as an example of Sok river basin (Samara region). It is used the descriptions of the local floras for three sectors of land. It is shown that the area of the minimum range depends on anthropogenic transformation of the territory.