Comparative Study of Methanogenic Pathways in the Sediments of Thermokarst and Polygenetic Yamal Lakes

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.

Authors
Kallistova A.Y.1 , Kadnikov V.V. 1 , Savvichev A.S.1 , Rusanov I.I.1 , Dvornikov Y.A. 2 , Leibman M.O.3 , Khomutov A.V.3 , Ravin N.V. 1 , Pimenov N.V.1
Number of issue
2
Language
English
Pages
261-267
Status
Published
Volume
90
Year
2021
Organizations
  • 1 Russian Acad Sci, Res Ctr Biotechnol, Moscow 119071, Russia
  • 2 RUDN Univ, Agr Technol Inst, Dept Landscape Design & Sustainable Ecosyst, Moscow 117198, Russia
  • 3 Tyumen Sci Ctr SB RAS, Earth Cryosphere Inst, Tyumen 625000, Russia
Keywords
permafrost; thermokarst lakes; methane; methanogenesis; methane oxidation
Date of creation
20.07.2021
Date of change
20.07.2021
Short link
https://repository.rudn.ru/en/records/article/record/74595/
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