The thesis is devoted to the research on participation of bryophytes in natural and devastated ecosystems of the Ukrainian Roztochia depending on ecological conditions and tendencies of anthropogenic transformation. The current state and anthropogenic changes of the bryoflora of the region are assessed, its taxonomic, biomorphological and ecological structure are analyzed. The participation of bryophytes from different ecobiomorphological groups as indicators of environmental conditions in the main ecosystems of the Ukrainian Roztochia (deciduous, coniferous and mixed forests, low, transitional and raised bogs, floodplain, lowland and dry meadows) is determined. The structure and dynamics of bryophyte cover have been studied and the participation of bryophytes in plant succession in devastated areas of sulfur deposits has been determined. For the first time, changes in species composition, frequency of occurrence, projective cover and life strategies under the influence of abiotic and biotic factors of natural and anthropogenically altered environment were identified and the main parameters of bryoindication of the environment were determined.
It is established that the bryoflora of Roztochia was subjected to synanthropization, which is reflected in the processes of apophytization and neophytization. For the first time, 46 new for this territory species of mosses were discovered, 21 rare and 76 regionally rare species of different categories were identified. According to obtained and literature data, 370 species of mosses have been identified for the Ukrainian Roztochia. The main life strategies of mosses are colonists and perennial stayers; according by humidity and fertility of localities mesotrophic mesophytes and hygrophytes dominate. There are constant seasonal changes in the projective cover and biomass of mosses, while the frequency of occurrence remains unchanged or increases under favorable conditions, activates the restoration of moss cover. For mosses with a life form of dense turf, the most indicators are the projective cover and biomass. The dynamics of formation of moss communities, reproductive effort and changes in dominant and subdominant species of mosses with different life forms and life strategies were determined.
The number of rare and endangered species of mosses and their taxonomic composition reflect about the character of anthropogenic influence on the bryoflora. Species composition and activity, frequency of occurrence, projective cover and biomass, life form, life strategy, reproductive efforts of bryophytes are the main indicators of the environment. The use of indicator characteristics of bryophytes in natural and anthropogenically altered ecosystems made it possible to establish the features of the structure of the phytocenoses and the level of their disturbance.
