Abstract
To identify features in natural reforestation after abandonment of land, this paper considers the current state of 21 tracts of fallow lands of the Tunka depression (Republic of Buryatia). On the basis of a geobotanical analysis, the species composition of tree and ground covers was revealed during the overgrowing of arable land on the basis of the geobotanical analysis. The landscape specificity of the main agrarian regions of the Tunka depression was reviewed, and directions for progressive successions occurring in different conditions of the functioning of geosystems were identified. By studying the dependence of demutation features on the state of the biogeocenoses surrounding the fallow lands, it was possible to single out the pine, birch, mixed and meadow varieties of vegetation after the termination of plowing. The dependence of the intensity of spread of tree undergrowth on the degree of remoteness from the forests surrounding the abandoned lands was confirmed. A decrease in overgrowth of tree species with an increase in the distance from the periphery of the deposit to its center was observed. Grazing and hay-mowing are the main factors complicating the process of reforestation. For determining the formation characteristics of the flora in the process of progressive successions, monitoring studies are appropriate.
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Funding
This work was done with the financial support from the Russian Foundation for Basic Research and from the Government of the Republic of Buryatia under a scientific project (18–45–030039 r_а).
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Translated by V.B.Sochava Institute of Geography SB RAS
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Atutova, Z.V. The Current State of Fallow Lands in the Tunka Depression (Southwestern Cisbaikalia). Geogr. Nat. Resour. 41, 141–150 (2020). https://doi.org/10.1134/S1875372820020067
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DOI: https://doi.org/10.1134/S1875372820020067