A comparative study of soil processes in depletion and accumulation zones of permafrost landslides in Siberia : научное издание

Описание

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1007/s10346-020-01550-z

Ключевые слова: landslides, soil microorganisms, permafrost, soil c and n contents, boreal ecosystems, soil respiration

Аннотация: Landslides are one of the main reasons for permafrost degradation in high latitudes. Any landslides consist of different top-down slope zones: removal, transit-depletion, and accumulation zones. These slope parts can demonstrate different successional behavior of plant community and carbon (C) cycling during post-sliding seral stagПоказать полностьюes. To address this issue, soil respiration (SR), hydrothermal conditions (mineral soil temperature at a depth of 5 cm (ST5, degrees C), and gravimetric soil water content at a depth of 0-5 cm in mineral soil horizon (SWC5, %)), total soil C (TC) and nitrogen (TN) contents, and soil microbial activity at the middle (depletion zone) and lower (accumulation zone) slope parts of the landslides with different history have been studied. The most significant differences between the middle and lower slope positions were found at the ground microsites (or G-plots) of the L2001 landslide. Thus, here, a midslope part occurred to be a high source of C compared to the lower part. Midslope of L2001 was characterized by significantly higher SR at G-plots as well because of better hydrothermal conditions and more intensive vegetation regeneration. The accumulation zone of L2001 characterized by the lower SR despite significantly higher microbial activity due to the high nutrient level of the soil moved from the top, likely favored to promotion of the soil C stabilization processes. Despite the registered ST5 differences in the E-plots and the G-plots between middle and lower slope positions of the L1972 landslide, SR, TC, TN, and soil microbial activity did not differ significantly.

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Издание

Журнал: LANDSLIDES

Выпуск журнала: Vol. 17, Is. 11

Номера страниц: 2577-2587

ISSN журнала: 1612510X

Место издания: HEIDELBERG

Издатель: SPRINGER HEIDELBERG

Персоны

  • Masyagina Oxana V. (RAS, SB, Krasnoyarsk Sci Ctr, Sukachev Inst Forest,Fed Res Ctr, 50-28 Akademgorodok, Krasnoyarsk 660036, Russia)
  • Evgrafova Svetlana Yu. (RAS, SB, Krasnoyarsk Sci Ctr, Sukachev Inst Forest,Fed Res Ctr, 50-28 Akademgorodok, Krasnoyarsk 660036, Russia; Siberian Fed Univ, 79 Svobodny Ave, Krasnoyarsk 660041, Russia; RAS, Melnikov Permafrost Inst, SB, 36 Merzlotnaya St, Yakutsk 677010, Russia)
  • Kholodilova Valentina V. (RAS, SB, Krasnoyarsk Sci Ctr, Sukachev Inst Forest,Fed Res Ctr, 50-28 Akademgorodok, Krasnoyarsk 660036, Russia; Siberian Fed Univ, 79 Svobodny Ave, Krasnoyarsk 660041, Russia)
  • Prokushkin Stanislav G. (RAS, SB, Krasnoyarsk Sci Ctr, Sukachev Inst Forest,Fed Res Ctr, 50-28 Akademgorodok, Krasnoyarsk 660036, Russia)