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The Effect of Grazing on the Temperature Regime of the Alas Soils of Central Yakutia

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  • Victor Makarov

    (Scientific Research Institute of Applied Ecology of the North, M.K. Ammosov North-Eastern Federal University, 43 Lenin Prospekt, 677980 Yakutsk, Russia)

  • Grigory Savvinov

    (Scientific Research Institute of Applied Ecology of the North, M.K. Ammosov North-Eastern Federal University, 43 Lenin Prospekt, 677980 Yakutsk, Russia)

  • Lyudmila Gavrilieva

    (Scientific Research Institute of Applied Ecology of the North, M.K. Ammosov North-Eastern Federal University, 43 Lenin Prospekt, 677980 Yakutsk, Russia)

  • Anna Gololobova

    (Scientific Research Institute of Applied Ecology of the North, M.K. Ammosov North-Eastern Federal University, 43 Lenin Prospekt, 677980 Yakutsk, Russia)

Abstract

There are numerous studies on the effect of grazing on the physical and chemical parameters of soils. However, the impact of grazing on the temperature regime of the alas soils in Central Yakutia is still poorly understood. This paper presents the results of long-term observations of the state of the soil-and-plant cover of thermokarst basins—i.e., alases—located in the Lena-Amga interfluve and actively used as pastureland. Observations of the process of the self-restoration of grass cover and changes in the temperature regime of alas soils were carried out on different variants (with isolation from grazing and without isolation). A significant increase in the average height of the grass stand and its foliage projective cover was observed with a gradual reduction in the number of species when isolated from grazing. Changes in the structure of the alas vegetation cover influence the microclimate of the soil. As a result of livestock grazing, the mean annual soil temperature rises and the amount and depth of the penetration of active temperatures increase. The most severe changes in the temperature regime occur in years with an abnormally high cover of snow. The soil warming observed during grazing undoubtedly has a favorable effect on soil organisms. However, in conditions of climate warming, grazing, especially overgrazing, can disrupt the permafrost regime and thereby provoke or intensify thermokarst phenomena.

Suggested Citation

  • Victor Makarov & Grigory Savvinov & Lyudmila Gavrilieva & Anna Gololobova, 2020. "The Effect of Grazing on the Temperature Regime of the Alas Soils of Central Yakutia," Land, MDPI, vol. 9(10), pages 1-15, October.
  • Handle: RePEc:gam:jlands:v:9:y:2020:i:10:p:365-:d:422533
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    References listed on IDEAS

    as
    1. Yoshihiro Iijima & Alexander N. Fedorov & Hotaek Park & Kazuyoshi Suzuki & Hironori Yabuki & Trofim C. Maximov & Tetsuo Ohata, 2010. "Abrupt increases in soil temperatures following increased precipitation in a permafrost region, central Lena River basin, Russia," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 21(1), pages 30-41, January.
    2. T. Zhang & T. E. Osterkamp & K. Stamnes, 1997. "Effects of Climate on the Active Layer and Permafrost on the North Slope of Alaska, U.S.A," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 8(1), pages 45-67, January.
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