Repets'ka G. The analysis of populations Salicornia europaea L. on gradients of ecological-coenotic factors

Research subjects: mechanisms of the functioning of plant populations in extreme habitats. Research objectives: investigation of population adaptive mechanisms, directed on rise of survival of halophytic annual species in extreme salinity habitats and detecting of leading environmental factors for halophytes. Methods: gradient analysis Theoretical and practical results: The number of adaptive mechanisms of a population level, directed on rise of survival of Salicornia europaea L. in extreme salinity habitats is detected; the humidity of soil, the quantity and seasons dynamic of the precipitation, and the plant density influence on populations processes; the results have practical importance for development of theoretical bases of the fitomelioration of the salt soil. Novel ty of the introduced: For the first time for halophytes the adaptive change of phenological development of plants in reply to the influence of the environmental factors is established; the presence in populations Salicornia europaea density-dependent mortality is revealed; the index of ecological and coenotic plasticity of parameters of plants is offered; for populations of salted habitats plants the law "constancy of a final crop " has received acknowledgement not for biomass of a population, but for a seed crop. Implementation degree: the results were implemented in courses "The mathematical methods in botany", "The quantitative methods of researching of the vegetation" and the field practice of the geobotany in the Botany Department of Tavrida National University by V.I. Vernadsky. Effectiveness: will promote optimization of improvement of ecological conditions of irrigated field, where processes of secondary salinization take place; increase of students training level. Sphere, sector of implementation: botany, ecology, nature protection.