The influence of cryogenic mass exchange on the distribution of viable microfauna in cryozems
- Authors: Gubin S.V.1, Lupachev A.V.2, Shatilovich A.V.1, Myl’nikov A.P.2, Ryss A.Y.3, Veremeeva A.A.1
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Affiliations:
- Institute of Physicochemical and Biological Problems of Soil Sciences
- Institute for Biology of Inland Waters
- Zoological Institute
- Issue: Vol 49, No 12 (2016)
- Pages: 1400-1413
- Section: Soil Biology
- URL: https://journals.rcsi.science/1064-2293/article/view/223616
- DOI: https://doi.org/10.1134/S1064229316120073
- ID: 223616
Cite item
Abstract
The role of cryogenic mass exchange in the distribution of the viable microfauna (ciliates, heterotrophic flagellates, and nematodes) in the profiles of cryoturbated cryogenic soils and in the upper layers of permafrost was revealed. The material for microbiological investigations was collected from the main horizons of cryozem profiles, including the zones with morphologically manifested processes of cryogenic mass exchange (the development of barren spots, cryoturbation, and suprapermafrost accumulation) and the zones affected by solifluction. The radiocarbon dating of the soil samples showed that the age of the organic cryogenic material and material buried in the course of solifluction varied from 2100 to 4500 years. Some zones with specific ecological conditions promoting the preservation of species diversity of the microfauna were found to develop in the cryozem profiles. A considerable part of the community (38% of ciliates, 58% of flagellates, and 50% of nematodes) maintained its viability in the dormant state, and in some cases, it could pass to the state of long-term cryobiosis in the upper layer of permafrost.
About the authors
S. V. Gubin
Institute of Physicochemical and Biological Problems of Soil Sciences
Author for correspondence.
Email: gubin.stas@mail.ru
Russian Federation, Pushchino, Moscow oblast, 142290
A. V. Lupachev
Institute for Biology of Inland Waters
Email: gubin.stas@mail.ru
Russian Federation, Borok, Yaroslavl oblast, 152742
A. V. Shatilovich
Institute of Physicochemical and Biological Problems of Soil Sciences
Email: gubin.stas@mail.ru
Russian Federation, Pushchino, Moscow oblast, 142290
A. P. Myl’nikov
Institute for Biology of Inland Waters
Email: gubin.stas@mail.ru
Russian Federation, Borok, Yaroslavl oblast, 152742
A. Yu. Ryss
Zoological Institute
Email: gubin.stas@mail.ru
Russian Federation, St. Petersburg, 199034
A. A. Veremeeva
Institute of Physicochemical and Biological Problems of Soil Sciences
Email: gubin.stas@mail.ru
Russian Federation, Pushchino, Moscow oblast, 142290