The influence of cryogenic mass exchange on the distribution of viable microfauna in cryozems
| Autor: | A. P. Myl’nikov, A. V. Lupachev, Alexandra Veremeeva, A. V. Shatilovich, S. V. Gubin, A. Yu. Ryss |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Soil test Cryoturbation Soil Science Species diversity Soil science Solifluction Biology Permafrost 010603 evolutionary biology 01 natural sciences law.invention law Environmental chemistry Microfauna Soil water Radiocarbon dating 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Eurasian Soil Science. 49:1400-1413 |
| ISSN: | 1556-195X 1064-2293 |
| DOI: | 10.1134/s1064229316120073 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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