ECOLOGICAL AND COENOTIC STRUCTURE OF FLORA OF THE TRANSCARPATHIAN PLAINS

Abstract

The Transcarpathian plain is the northeastern part of the large Middle Danube lowland in the Transcarpathian region. The length of the plain is 80–90 km, the width is 22–23 km, the height is 102–120 m asl. Within the Transcarpathian plain stands out the Berehiv hills, represented by single volcanic mountains of 300-500 m altitude (Black Mountain – 568 m asl, Shalanka – 372 m asl. and other).
The Transcarpathian plain is located mainly on the right bank of the Tisza River. Soil-forming rocks are mostly acidic. The climate of the Transcarpathian plain is humid, temperate and continental.
The spontaneous flora of the Transcarpathian plain consists of 1209 species of higher vascular plants. Depending on the ecological and coenotic affiliation of flora species to the main zonal vegetation types, seven florencoenotypes were identified in the territory of the studied region: 1) Immoral (Nemoralophyton) – 375 coenoelements (33.33% of the total number of species). In the composition of the Nemoralophyton the florencoenosvites are distinguished: a) oak-hornbeam (Querceto-carpinetophytum) – 130 coenoelements (10.75%); b) helio-quercetal (Quercetophytum) – 171 coenoelements (14.14%); c) fagetal (Fagetophytum) – 74 coenoelements (6.12%); 2) Meadow (Pratophyton) – 220 coenoelements (18.2%). As a part of the Pratophyton the florencoenosvites are: а) flood-meadow (Humidopratophytum) – 92 coenoelements (8.02%); b) land-meadow (Mesopratophytum) – 132 coenoelements (10.92%); 3) Meadow-steppe (Prato-Steppophyton) – 164 coenoelements (13.56%); 4) Xerothermic shrub (Xerothamnophyton) – 32 coenoelements (2.65% ); 5) Marsh (Paludophyton) – 31 coenoelements (2.56%); 6) Hygro-hydrophilic (Hyhro-Hydrophyton) – 129 coenoelements (10.67%). As a part of the Hygro-Hydrophyton the florencoenosvites are: a) coastal-water (Hygrophytum) – 79 coenoelements (6.53%); b) aqueous (Hygrophytum) – 50 coenoelements (4.13%); 7) Synanthropic (Synantropophyton) – 285 coenoelements (23.57%). In the composition of the Syntantropophyton the florencenosvites are as follows: a) vegetative vegetation (Segetalophytum) – 132 coenoelements (10.92%) and b) ruderal vegetation (Ruderalophytum) – 153 coenoelements (12.65%).
The results of the analysis of the ecological-coenotic structure of the flora of the Transcarpathian plain showed that the leading position is occupied by species of the immoral florenceonotype (Nemoralophyton) (with the predominance of the helio-quercetal florencoenosvita (Quercetophytum); meadow (Pratophyton) (with the predominance of land-meadow florencoenosvita (Mesopratophytum) and meadow-steppe (Prato-Steppophyton) florencoenotypes.
The distribution of species by major ecological-coenotic groups reflect the features of the main genetic types of vegetation, climatic, edaphic conditions and terrain of the territory under study