The results of flora studies on 10 railways segments in the Nizhny Novgorod region are presented. An analysis of correlations between the Jaccard coefficients of floristic similarity, calculated for fractions of floras of the studied segments, and the distances between these segments showed a statistically significant correlation with the distance between the segments for a fraction of rare species, which can directly characterize the process of their dispersal. The results obtained confirm that methodology used for collecting and analysis of floristic data is logically interpretable and promising for further usage.

A.V. Chkalov, D.A. Degtyarev