Comparative Study of Methanogenic Pathways in the Sediments of Thermokarst and Polygenetic Yamal Lakes
Autor: | N. V. Pimenov, Alexander S Savvichev, Vitaly V. Kadnikov, A. Yu. Kallistova, Artem Khomutov, Igor I Rusanov, N. V. Ravin, Marina Leibman, Yu. A. Dvornikov |
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Rok vydání: | 2021 |
Předmět: |
0303 health sciences
geography animal structures geography.geographical_feature_category biology Methanoregula 030306 microbiology Ecology Methanogenesis Chemistry Methanothrix biology.organism_classification Applied Microbiology and Biotechnology Microbiology Methanogen Thermokarst 03 medical and health sciences parasitic diseases Dissolved organic carbon Relative species abundance 030304 developmental biology Archaea |
Zdroj: | Microbiology. 90:261-267 |
ISSN: | 1608-3237 0026-2617 |
Popis: | Comparative study of methanogen diversity and potential activity of different methanogenic pathways in the sediments of young thermokarst and mature polygenetic Yamal lakes was carried out. The hydrogenotrophic pathway of methanogenesis played an important role in methane formation in thermokarst lakes. The acetoclastic and methylotrophic pathways were also revealed there. In a polygenetic lake with a dissolved organic matter content closest to that of the thermokarst lakes, methanogenesis proceeded more intensively, and the relative abundance of methanogens, especially acetoclastic ones, was higher than in thermokarst lakes. The activity of methyl-reducing methanogens was also assumed there. Methanogens of the genera Methanothrix and Methanoregula, as well as representatives of the family Methanomassiliicoccaceae were identified in the sediments of all lakes. Methane-oxidizing bacteria (Methylobacter, Candidatus “Methylomirabilis”) and archaea (Ca. “Methanoperedens”) were also detected. |
Databáze: | OpenAIRE |
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