Особенности географического распространения сегетальных растений в Свердловской области

Abstract

The floristic similarity of segetal plants was examined in the Sverdlovsk region within the four phytogeographical districts selected by geographic position, natural environment and climatic features. About 40 % of segetal plants (94 species) occurred within all the districts and 21 % (50 species) occurred only in one district. The Jaccard similarity coefficient of segetal plants within the districts varied from 0,56 to 0,72. The closest similarity of segetal plants was revealed between the north forest-steppe and the south boreal forest districts. Segetal plants of the middle boreal forest district was the most distinct.