PINE FORESTS OF THE LOWER PART SNOV RIVER BASIN AS REFUGIUMS FOR BOREAL SPECIES OF VASCULAR PLANTS ON THE SOUTHERN BORDER OF CHERNIHIV POLISSIA

Abstract

Forest ecosystems perform important ecological functions, are centers and reserves of biodiversity and act as a necessary component of landscapes. Within the research region, pine forests, which were formed on the floodplain terraces of rivers and are edaphically characterized by the predominance of sod-podzolic soils, are quite common. The cenotic diversity of pine forests in the study area is determined mainly by groups typical for the Polish region, with corresponding ecological differentiation, specific growth conditions, and the participation of rare species. Pine forests of the lower part of the Snow River basin, according to the classification syntaxonomic scheme given in the article, are represented by four subformations Piceeto (abietis) – Pineta (sylvestris), Pineta (sylvestris), Querceto (roboris) – Pineta (sylvestris) vacciniosa (myrtilli) and Betuleto (penduli) – Pineta (sylvestris), nine groups of associations and 14 associations, among which Pineta hylocomiosa is the most representative with a predominance of coenoses of associations such as: Pinetum hylocomiosum, P. vaccinioso (myrtilli) – hylocomiosum. assistant Pinetum (sylvestris) – amelanchieroso (ovalis) – convallariosum. The groups of ace have a certain scientific interest Pinetum (sylvestris) – amelanchieroso (ovalis) – convallariosum. The diversity of vascular plants of the pine forests of the research area includes 91 boreal and subboreal species, which belong to 71 genera, which belong to 33 families, respectively. The sozological value of the boreal flora of the research region is determined by 10 rare species of vascular plants (one species from the Red Data Book of Ukraine, nine species of regionally rare protection status in the Chernihiv region).