Lukash O. Development lines and sozological rating of Eastern Polissya vascular plants' flora

The thesis presents the results of an integrated research of Eastern Polissya vascular plants' flora encompassing 1315 species. The data concerning the said region's growth in late glacial and holocene epochs are generalized. The basic stages of Eastern Polissya's floristic study are outlined. Primary lines of Eastern Polissya vascular plants' flora's development are defined in regard to the study of its modern structure and dynamics, such as reduction of growth locations and elimination of indigenous species' populations, climatic oppression of some species, other species' natural habitat expansion, xerophytization, adventization, adaptive reconfiguration of their floroecotopological structure. Floristic district division of the investigated territory is carried out. Eastern Polissyan flora is given sozological evaluation. Creating new protected areas and a IPA "The Flood-plain of the Desna-river" are suggested as the means of preserving the plant diversity of the region. The conducted integrated rating allows to predict Eastern Polissya vascular plants' flora's development lines under the influence of climatic and anthropogenous changes. Key words: East Polissya, flora, structure, dynamics, lines of development, sozology rating, predicting.