MARGINAL AND EXTERNAL GORGANY FLORA’S SYNANTHROPIZATION

Abstract

A scarce information is avaliable on vascular plants of Marginal and External Gorgany flora. A focused study of its synanthropic component was not implemented. Analysis of the herbaria collections, published data and own field research findings found that synanthropic fraction of flora consists of 268 species (28 % of the species composition of the flora), 144 (54 %) of which are apophytes, 124 (46 %) – adventive species (inclu­ding archeophytes – 66 (52.8 %) species and kenophytes comprises group of 58 (47.2 %). 75 (52.1 %) species of apophytes group participates only in the ruderal communities, 54 (37.5 %) species – both in the segetal and ruderal ones, only in segetal – 15 (10.4 %) species. A low percentage of segetal species is explained by a small fraction of the plowed areas and the fact that agricultural land is not plowed up annually and periodically are left fallow. Most by species of adventive fraction of Marginal and External Gorgany flora have a tendency to occupy man-made habitats (A) – 83.3 %, semi-natural (S) – 23.0 %, 16 % of listed species into natural communities (N) penetrate. On the altitudinal gradient, synanthropic species are distributed evenly. It is associated with a small difference altitudinal range of the study area and considerable forest cover. Most synanthropic species prefer the meadow cenoses because they are more anthropogenically modified than the forests.