FLORISTIC SIMILARITY OF TREES AND SHRUB RANGE OF THE PARKS IN THE CITY OF ORENBURG
The information on the status of greening of the city of Orenburg using culture and leisure parks as the example is discussed. A qualitative evaluation of green stands is presented. A comparison of species diversity of parks using binary similarity measure by Jaccard and the coefficient of floristic similarity of tree and shrub flora by Ochiai (A. Ochiai) was made. To determine the degree of similarity of tree and shrub flora in Orenburg parks the formula of Paul Jaccard was used since the formulas for calculating the coefficient of floristic similarity according to other authors as Kulchinsky, Serensen, Braun-Blanque, are “equivalent”. We have chosen the formula of Ochiai (A. Ochiai) to confirm the accuracy of research results because it differs from other calculation formulas of floristic similarity and eventually using the formula of Ochiai (A. Ochiai) we have confirmed the correctness of the calculations by the formula of Paul Jaccard. The results of the research are presented graphically in tabular form for easy visual comparison. The comparison of the largest and the smallest coefficients of species diversity is made, the recommendations on plant care activities in certain parks are proposed.