Umerova A. The terrestrial micromollusc of anthropogenically transformed ecosystems: the impact of the reclamation and the recreation

The natural resources are one of the most important sources, the existence of humanity depends on them. The problem of rational use of natural resources has always been and remains extremely important, especially for industrial regions of Ukraine. Due to scientific and technological progress, rapid socio-economic raising, the industrial expansion, the growing of the urbanization and the increase of the number of the population, the level of the use resources, including minerals, is constantly increasing. The purpose of the dissertation work is to assess the organization of the ecological niches of the terrestrial micromollusc under the influence of the reclamation and the recreation. The scientific novelty of the obtained results consists in that the role of edaphic factors (electrical conductivity, soil penetration resistance and aggregate composition) and the meaning of the vegetation on the spatial organization of the ecological niche of terrestrial micromollusc in anthropogenically transformed ecosystems has been researched firstly; the peculiarity of the ecological niche of micromollusc on technozems has been determined; Hutchinson's theory of ecological niche and the methods of their quantitative estimation in ecological-geographical space have further development; the role of the spatial distribution of the aggregate fractions of technozems as the marker of the ecological niche of micromollusc has been researched; the role of recreation as the factor of the spatial distribution of the grouping of micromollusc in the conditions of urban landscape has been proved; the spatial variability of the grouping of the terrestrial micromollusk in the conditions of the urbanized environment has been estimated. The ecological niche of Vallonia pulchella has been represented with the integral changes, such as the axis of marginality and specialization, which are the foundation for the building of the map of the spatial variation of the index of predominance of the location (HSI). It has been installed that the axes of marginality and specialization of the ecological niche of V.pulchella, which are projected in the space of the aggregate fractions of soil, differ significantly from the random alternative. The marginality of the ecological niche of micromollusc correlates with the indicators of the soil penetration resistance from 0-5 to 20-25 cm, and according to phytoindication estimation they are determined with the variability of humidity and aeration. Specialization of V.pulchella correlates with the indicators of the soil penetration resistance in the range of 25-35 cm, nitrogen content and the regime of acidity of soil. Based on the analysis of the calculated variograms and the maps of spatial variability of aggregate fractions which are built on their basis, it has been installed that agronomically valuable aggregates predominate in technozems. The information about the aggregate composition of technoszems can be used effectively in the organization of the agricultural process to find the most rational ways of the management of the reclaimed land.