THE INFLUENCE OF RECREATIONAL IMPACT IN FOREST COMMUNITIES ON THE ALLELOPATHIC REGIME OF TREE EDIFICATORS

The allelopathic regime of the phytogenic field of model middle-aged trees of seven forest formations in the zone of humid subtropics of the Sochi Black Sea region was evaluated with an admissible range of stages of recreational digression. The method of biotesting of water extracts from forest litter, soil and roots was used to determine the spatial gradient of allelopathic activity of the phytogenic field environ-ment. The share of participation of the allelopathic factor in the formation of the phytogenic field at certain stages of recreational digression was established. It was determined that the value of allelopathic intensity of the phytogenic field, depending on the stage of recreational digression, field zones and edifi-cator species, can characterize the degree of resistance to the introduction of new species, recreational resistance and community stability.

The assessment of the spatial ontogenetic structure of the coenopopulation Oxytropis floribunda (Pall.) DC. in undisturbed coenoses (on the territory of the Samara Region)

Data on the peculiarities of rare plants coenotic populations organization in petrophytic steppes make a certain contribution to the development of theoretical issues of phytocoenology, bioecology and nature protection. Coenopopulations of Oxytropis floribunda (Pall.) DC. are monitored on the territory of the Samara Region (the natural monument Sernovodnyy Shikhan) in the course of the work. Population ontogenetic methods have been used, including methods of spatial statistics. The coenopopulation of the species has been studied in the Stipa pennata Oxytropis floribunda community without any apparent anthropogenic load. It has been found that the total number of individuals of O. floribunda in the studied coenopopulation was 81 individuals, with a density of 6 individuals per 1 m. The phytogenic field strength coefficient is 0,06. The studied community is dominated by the pregenerative age states of O. floribunda. The coenopopulation of O. floribunda is generally characterized by a contagious type of spatial structure with the formation of aggregations of 0,41,2 m in size. The Ripley function graph for pregenerative plants has also showed the presence of clustering zones that occurs due to seed germination near the mother plants of the studied representative. Generative individuals of O. floribunda in the plant community are located randomly, which indicates favorable conditions for the growth of the species in this area.

ALLELOPATHIC CHANGES OF FAGUS ORIENTALIS L. UNDER INFLUENCE OF RECREATION

Проводится оценка изменений аллелопатической составляющей фитогенного поля бука восточного под воздействием рекреационной нагрузки. Методом биотестов определено, что воздействие разовой предельно допустимой рекреационной нагрузки отражается на пространственном изменении величины аллелопатического влияния в зонах фитогенного поля. Changes in the allelopathic component of the phytogenic field of the beech eastern under the influence of recreational load were estimated. Using the biotest method, it was found that the influence of a single maximum permissible recreational load affects the spatial change in the magnitude of the allelopathic effect in the zones of the phytogenic field.

The phytogenic effect of different-aged black saxaul plants on the productivity of wormwood-ephemeral vegetation under the conditions of Karnabchul

The aim of the study is to determine the effect of different-age black saxaul plants on the productivity of wormwood-ephemeral vegetation through the study of the phytogenic field of this ephemeroid species. The phytogenic field of black saxaul has been studied by the phytomer method in the desert Karnabchul. The study showed that its influence in the minimum phytogenic field on the productivity of wormwood-ephemeral vegetation is negative, in the external part of the phytogenic field on bluegrass and forbs is positive, and on wormwood and sedge remains negative. The highest productivity indices are observed in them between the outer and inner and outer parts of the phytogenic field of the middle-aged generative plants of the edificator.

Geochemical properties of water under the waste heaps in Chervonohrad mining region

The geochemical properties of water under the waste heaps within the Chervonohrad mining region have been studied. The environmental remediation around the technogenic reservoirs of rock heaps using the bioplateau systems is proposed. In 2017, samples were taken from reservoirs of technogenic origin located at the foot of rock heaps of such coal mines as “Mezhyrichanska”, “Velykomostivska”, “Stepova”, “Zarichna”, “Lisova” and “Chervonohradska”. According to the analysis of the studied parameters, it has been determined that water under the Mezhyrichanska Mine waste heaps is the most polluted. The most dangerous landscape-transforming factor of water under the waste heaps is the transfer of polluting substances into the soil, surface and subterranean waters. Through the use of the Pearson coefficients of correlation, the ratios between pollution patameters have been obtained. The determined correlation coefficients are high, positive (r = 0.78 – 0.99) and evidence of the toxic components spread in water under the waste heaps throughout the entire coal mining region. The obtained geochemical data on water under the waste heaps of mines in the Chervonohrad mining region are important in terms of the environmental impact assessment of mining activity on the human body and the biosphere components – the hydrosphere, the phytogenic field. It is necessary to establish environmental monitoring systems and to develop measures for the environmentally safe decommissioning the waste heaps of coal mines.