Soils of tukulans in the Kenkeme river basin (Central Yakutia)
https://doi.org/10.31242/2618-9712-2020-25-4-9
Abstract
The soils developing on the sandy deposits of Central Yakutia were studied on the right-bank part of the Kenkeme river basin (62° 04′N, 128 ° 59′–129° 00′ E). In the studied area, landscapes are represented by early Eopleistocene formations of eluvial and solifluction genesis. The ice content of frozen sandy deposits is 30–50 %, their temperature ranges from –0.5 to –7 °С, with average values –1 ... –3 °С. The thickness of the seasonally thawed layer varies from 0.5 to 4.3 m, depending on landscape conditions, with average values of 1–2.5 m. It was established that permafrost sandy weakly-podzolized soils with profile structure O–A–AE–EB– Bf–BC–C1–C2 were formed under pine forests. Permafrost taiga gleyic weakly-podzolized (O–AT–EB–B– BCg) and peaty-gleyic (OT–T–Bg) soils are formed in the depressions under hummock dwarf birch thickets with varying moisture content. All types of soils are characterized by the predominance of coarse and medium sand fractions in the granulometric composition, acidic reaction of the medium, and very low humus content in the mineral part of the profile. Different combinations of bluish-gray and ocher-rusty smears in the gleyic horizons of permafrost taiga gleyic weakly-podzolized and peaty-gleyic soils reveal a change from the initially oxidizing environment to predominantly reducing one under the conditions of excessive moisture content
Supporting agencies: This work was supported by the SB RAS project on the topic 0376-2019-0006; registration number AAAA-A19-119040990002-1.
About the Authors
M. V. Okoneshnikova
Institute for Biological Problems of Cryolithozone SB RAS
Russian Federation
Russian Federation
OKONESHNIKOVA Matrena Vasilievna, candidate of biological sciences, senior researcher
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
41 Lenina pr., Yakutsk 677980
A. R. Desyatkin
Institute for Biological Problems of Cryolithozone SB RAS
Russian Federation
Russian Federation
DESYATKIN Alexey Romanovich, candidate of biological sciences, senior researcher
41 Lenina pr., Yakutsk 677980
N. V. Filippov
Institute for Biological Problems of Cryolithozone SB RAS
Russian Federation
Russian Federation
FILIPPOV Nikolai Vasilievich, engineer-researcher
Lenina pr., 41, Yakutsk 677980
R. V. Desyatkin
Institute for Biological Problems of Cryolithozone SB RAS
Russian Federation
Russian Federation
DESYATKIN Roman Vasilievich, doctor of biological sciences, chief researcher
Yakutsk 677980, Lenina pr., 41
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Review
For citations:
Okoneshnikova M.V., Ivanova A.Z., Desyatkin A.R., Filippov N.V., Desyatkin R.V. Soils of tukulans in the Kenkeme river basin (Central Yakutia). Arctic and Subarctic Natural Resources. 2020;25(4):111-120. (In Russ.) https://doi.org/10.31242/2618-9712-2020-25-4-9
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