Water impoundment reshapes the ecological environment around the bank-line of newly built reservoirs. Therefore, reservoir buffer strips play a disproportionately large role in the maintenance of ecosystem functions and environmental benefits during the early stage of reservoir formation. However, there are gaps in the research on soil particle-size-associated carbon distribution characteristics within different historical land-use types in newly formed reservoir buffer strips. In this study, we focused on soil particle size fractions, aggregate stability, and particle-size-associated carbon distribution characteristics of different historical land-use types of reservoir buffer strips at distance scale (i.e., different distance from the water) after reservoir impoundment in the Chushandian Reservoir, China, and explored the relationship between them. The results showed that the soil texture of abandoned cropland and grassland are classified as silt loam and woodland are classified as sandy loam; different historical land-use types in newly formed reservoir buffer strips showed significant differences in soil aggregate stability after reservoir impoundment; a distance scale was used to measure these differences, which were mainly due to the dry-wet cycles and water submerged condition caused by the buffers’ different distances from water. The newly formed reservoir buffer strips underwent corresponding changes in the particle-size-associated carbon distribution characteristics after reservoir impoundment, mainly due to the turnover property of different soil particles combined with organic carbon. Reservoir impoundment accelerates the turnover of silt particle and associated nutrients in soils of historical land-use types in newly formed reservoir buffer strips; turnover may be mediated mainly by microbial biomass.

Introduction. Hunting has long been considered the main form of human activity and the main source of its existence. With the development of civilization, the biological significance of hunting for man has been lost. Today , hunting is a traditional type of activity of the population and economic entities, hunting is a type of active recreation and sport, which in general forms an important component of forest use.Analysis of official statistics on the dynamics of the number of major species of hunting fauna over the past decades shows the spontaneous and inefficient management of hunting in almost all regions of Ukraine. Despite the minimal volumes of extraction of the main hunting animals, the number of their populations remains almost at the same level, and some species even decrease (Muraviov, 2019).Wild animals in their habitat are constantly under the influence of various factors -abiotic, biotic and anthropogenic, which determine the state of species populations. Such effects directly or indirectly change the number, fertility and mortality, seasonal movements, migration and immigration, morbidity, physical and physiological condition of hunting animals (Sobol, 2021 Panek, 2004.Anthropogenic pressure on the environment can be traced in the transformation of the main abiotic factors, especially climatic (temperature, light, humidity, radiation regime, pressure), which are the most variable. Increasing the temperature regime and reducing the amount of precipitation contribute to an increase in the frequency of dry winds, heat and sudden changes in temperature during the day (Adamenko, 2006). Temperature in general affects the distribution of some species through the forage base.Anthropogenic impact is manifested through the intensification of agricultural production (the use of highly toxic chemicals to control unwanted organisms), high plowing of land, reclamation measures, which ultimately led to a decrease in the forage base of ungulates and habitats of other hunting animals. Currently, plowed land in Ukraine is the largest in the world, reaching 56% of the total area, and 80% of agricultural land (Apostol, 2020; FAO).A. V. Domnich, I. O. Smirnova, D. O. Buglo, V. V. Petrichenko (Domnich, 2010;Smirnova et al., 2011) studied the features of the transformation of natural habitats of hunting fauna. In the forest-steppe zone, similar studies were conducted by Korzh (Korzh & et al., 2006), Katysh (Katysh, 2016.Human actions in the natural environment, conscious or unconscious, often cause stress in wild animals, which can lead to significant physiological changes in Modern Challenges of Agrarian Transformations In Ukraine:Agriculture, Forestry And Horticulture

Actuality of theme. Thinning are a generally accepted system for the purposeful formation of economically valuable foreststands with the desired composition, structure and productivity [1; 3; 4; 8; 9]. In the conditions of the SE "Shostka forestry unit" system of thinning are carried out periodically, part of trees is cut down in foreststands for the purpose of improvement of conditions of development for those trees which remained for the further growth. Due to the system of thinning, wood is harvested, which over time can be a natural waste. Thus, due to timely and high-quality thinning, the composition and structure of stands are improved, as well as the yield of liquid wood per unit area is increased, and the time for growing technically mature wood is reduced. In general, system of thinning contributes to the rational use of forest resources [1; 3; 4; 8; 9]. Of great importance is the presence of a set of standards governing their implementation [2; 4-6]. In 2020, SE "Shostka forestry unit" planned to take measures to improve the sanitary condition of forests on an area of 736.4 hectares. In Voronezh forestry subdivision, 212.6 ha were allocated for the system of thinning, including 85.1 ha for precommercial thinning.The purpose of the research is to reveal the peculiarities of pre-commercial thinning in foreststands in the conditions of the specified enterprise. The object of study -the process of formation of foreststands by care felling. The subject of research is the specifics of the use of through pre-commercial thinning in pine foreststands of the specified enterprise.The following research methods were used: monographic; silvicultural and forest inventory (for laying experimantal plots in order to establish silvicultural and forest inventory's indicators of forest stands); silvicultural and ecological (to provide typological characteristics of forest stands).The scientific novelty of the research is the generalization of scientific approaches and the study of practical experience in conducting system of thinning in forest stands in the enterprise. The results of the research have practical application in the field of system of thinning, will improve the conduct of transitional felling in the study area.SE "Shostka forestry unit" with an area of 27074.7 hectares is located in the north-western part of Sumy region in the Krolevets and Shostka administrative districts and the city of Shostka. The administrative and organizational structure of the enterprise includes 4 forestries: Myronivske (5743.7 ha), Sobytske (7366.6 ha), Shostkynske (5731.8 ha) and Voronezhke (8232.6 ha) [6]. According to forest zoning, the territory of the forestry belongs to the Kyiv-Chernihiv (Eastern Polissya) forestry district, the forest vegetation zone of Polissya. The climate of the forestry area is temperate-continental with long continental summers, sufficient rainfall and Modern Challenges of Agrarian Transformations In Ukraine:Agriculture, Forestry And Horticulture