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ГЕОХИМИЧЕСКИЙ МОНИТОРИНГ ЛЕСОСТЕПНЫХ ЛАНДШАФТОВ КУРСКОЙ БИОСФЕРНОЙ СТАНЦИИ
To assess the ecological and geochemical state of the anthropogenic landscapes of the Kursk region, the natural landscapes of the Kursk Biosphere Station (KBS) have been used as background for many years. However, in the absence of river and groundwater runoff, the KBS plain landscapes receive pollutants with air migration, in which transboundary transport and the influence of local pollution sources play the main role. In this regard, over the past 5 years, geochemical monitoring of the snow and soil cover has been carried out on the KBS territory to assess the content of chemical elements in it, and thereby confirm the status of the KBS natural landscapes as background. Geochemical studies of 2013-2019 showed that during this period, as a result of emissions from enterprises of the southern industrial region of Kursk, an increase in Pb concentrations is observed in the snow of the KBS landscapes by a factor of 29; Cd, Zn, Co, Sn, respectively, 13, 9, 6, 5 times; Nb, Cr, B, V, Ni - 2-4 times. The regional and transboundary transfer of air masses is associated with the constant supply of Be to the snow cover, the positive dynamics of Zr, Ag, W. At the same time, the anthropogenic impact on the KBS landscapes over the past 5 years has not led to a change in the natural content of chemical elements in chernozem soils. The natural landscapes of the KBS in terms of the content of heavy metals in soils can function as background landscapes.