Soils of cryogenic forms of the tundra and forest-tundra zones microrelief in the North-Eastern Yakutia
https://doi.org/10.31242/2618-9712-2022-27-1-98-108
Abstract
The study investigated soils of the tundra and forest-tundra parts of the Kolyma River basin (68°44'–69°03'N, 160°59'–161°22'E). These soils are developed on the polygonal ridged and hummockand-hollow cryogenic forms of microrelief. The territory of the Kolyma accumulative lowland is composed of the Quaternary deposits of the Middle and Late Pleistocene age. The depth of the seasonally thawed layer depends on landscape conditions and varies from 0.2 to 1.0 m, with average values of 0.3–0.7 m. Soils of the polygonal ridged tundra (near Pokhodsk) are represented on the ridges by acidic permafrost tundra gley peat soils [ОТ–Т–АТg–Вg┴], which occur in a complex with permafrost peat soils of microdepressions (polygons) [ОТ–Т┴]. These are acidic soils with high values of ignition loss in the upper organogenic horizons. In the forest-tundra, on the border with the northern taiga (near Chersky), the soil surface is characterized by a hummock-and-hollow microrelief caused by permafrost cracking. Here, the studied soils are represented by a conjugate combination of permafrost taiga gleyic soils inside of depressions [О–Т– АВf–Вg–ВСg┴] permafrost taiga non-gley soils of hummock [О–Тh–АВ–В(ВС)┴]. The soil described at the top of the hummock practically has no signs of gleying and is poorly differentiated; the soil of the depression is gleyed and is characterized by the presence of signs of organic matter accumulation in the suprapermafrost layer.
Keywords
Supporting agencies: The research was supported by the Russian Fund for Basic Research (grant of the topic 19-29-05151; registration number AAAA-A20-120061190009-9).
About the Authors
R. V. Desyatkin
Institute for biological problems of cryolithozone SB RAS
Russian Federation
Russian Federation
DESYATKIN, Roman Vasilievich, Dr. Sci. (Biology), chief researcher
Siberian Branch of the Russian Academy of Sciences, 41 Lenina pr., Yakutsk 677980
A. Z. Ivanova
Institute for biological problems of cryolithozone SB RAS
Russian Federation
Russian Federation
IVANOVA, Alexandra Zuevna, junior researcher
Siberian Branch of the Russian Academy of Sciences, 41 Lenina pr., Yakutsk 677980
M. V. Okoneshnikova
Institute for biological problems of cryolithozone SB RAS
Russian Federation
Russian Federation
OKONESHNIKOVA, Matrena Vasilievna, Cand. Sci. (Biology), senior researcher
Siberian Branch of the Russian Academy of Sciences, 41 Lenina pr., Yakutsk 677980
A. R. Desyatkin
Institute for biological problems of cryolithozone SB RAS;
Melnikov permafrost institute SB RAS
Russian Federation
Russian Federation
DESYATKIN, Alexey Romanovich, PhD, senior researcher
Siberian Branch, Russian Academy of Sciences, 41 Lenina pr., Yakutsk 677980, Russia;
Siberian Branch of the Russian Academy of Sciences, 36 Merzlotnaya st., Yakutsk 677010
N. V. Filippov
Institute for biological problems of cryolithozone SB RAS
Russian Federation
Russian Federation
FILIPPOV, Nikolai Vasilievich, engineer-researcher
Siberian Branch of the Russian Academy of Sciences, 41 Lenina pr., Yakutsk 677980
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Review
For citations:
Desyatkin R.V., Ivanova A.Z., Okoneshnikova M.V., Desyatkin A.R., Filippov N.V. Soils of cryogenic forms of the tundra and forest-tundra zones microrelief in the North-Eastern Yakutia. Arctic and Subarctic Natural Resources. 2022;27(1):98-108. (In Russ.) https://doi.org/10.31242/2618-9712-2022-27-1-98-108
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