Microbial methane cycling in sediments of Arctic thermokarst lagoons

Microbial methane cycling in sediments of Arctic thermokarst lagoons

© 2023 The Authors. Global Change Biology published by John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 29(2023), 10 vom: 27. Mai, Seite 2714-2731
1. Verfasser: Yang, Sizhong (VerfasserIn)
Weitere Verfasser: Anthony, Sara E, Jenrich, Maren, In 't Zandt, Michiel H, Strauss, Jens, Overduin, Pier Paul, Grosse, Guido, Angelopoulos, Michael, Biskaborn, Boris K, Grigoriev, Mikhail N, Wagner, Dirk, Knoblauch, Christian, Jaeschke, Andrea, Rethemeyer, Janet, Kallmeyer, Jens, Liebner, Susanne
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article 13C ANME AOM MOB coastal permafrost methanotrophs methylotrophic methanogenesis permafrost thaw sulfate reduction mehr... sulfate-methane transition zone Methane OP0UW79H66 Water 059QF0KO0R Sulfates
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245 1 0 |a Microbial methane cycling in sediments of Arctic thermokarst lagoons 
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500 |a Date Completed 13.04.2023 
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500 |a Citation Status MEDLINE 
520 |a © 2023 The Authors. Global Change Biology published by John Wiley & Sons Ltd. 
520 |a Thermokarst lagoons represent the transition state from a freshwater lacustrine to a marine environment, and receive little attention regarding their role for greenhouse gas production and release in Arctic permafrost landscapes. We studied the fate of methane (CH4 ) in sediments of a thermokarst lagoon in comparison to two thermokarst lakes on the Bykovsky Peninsula in northeastern Siberia through the analysis of sediment CH4 concentrations and isotopic signature, methane-cycling microbial taxa, sediment geochemistry, lipid biomarkers, and network analysis. We assessed how differences in geochemistry between thermokarst lakes and thermokarst lagoons, caused by the infiltration of sulfate-rich marine water, altered the microbial methane-cycling community. Anaerobic sulfate-reducing ANME-2a/2b methanotrophs dominated the sulfate-rich sediments of the lagoon despite its known seasonal alternation between brackish and freshwater inflow and low sulfate concentrations compared to the usual marine ANME habitat. Non-competitive methylotrophic methanogens dominated the methanogenic community of the lakes and the lagoon, independent of differences in porewater chemistry and depth. This potentially contributed to the high CH4 concentrations observed in all sulfate-poor sediments. CH4 concentrations in the freshwater-influenced sediments averaged 1.34 ± 0.98 μmol g-1 , with highly depleted δ13 C-CH4 values ranging from -89‰ to -70‰. In contrast, the sulfate-affected upper 300 cm of the lagoon exhibited low average CH4 concentrations of 0.011 ± 0.005 μmol g-1 with comparatively enriched δ13 C-CH4 values of -54‰ to -37‰ pointing to substantial methane oxidation. Our study shows that lagoon formation specifically supports methane oxidizers and methane oxidation through changes in pore water chemistry, especially sulfate, while methanogens are similar to lake conditions 
650 4 |a Journal Article 
650 4 |a 13C 
650 4 |a ANME 
650 4 |a AOM 
650 4 |a MOB 
650 4 |a coastal permafrost 
650 4 |a methanotrophs 
650 4 |a methylotrophic methanogenesis 
650 4 |a permafrost thaw 
650 4 |a sulfate reduction 
650 4 |a sulfate-methane transition zone 
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650 7 |a Sulfates  |2 NLM 
700 1 |a Anthony, Sara E  |e verfasserin  |4 aut 
700 1 |a Jenrich, Maren  |e verfasserin  |4 aut 
700 1 |a In 't Zandt, Michiel H  |e verfasserin  |4 aut 
700 1 |a Strauss, Jens  |e verfasserin  |4 aut 
700 1 |a Overduin, Pier Paul  |e verfasserin  |4 aut 
700 1 |a Grosse, Guido  |e verfasserin  |4 aut 
700 1 |a Angelopoulos, Michael  |e verfasserin  |4 aut 
700 1 |a Biskaborn, Boris K  |e verfasserin  |4 aut 
700 1 |a Grigoriev, Mikhail N  |e verfasserin  |4 aut 
700 1 |a Wagner, Dirk  |e verfasserin  |4 aut 
700 1 |a Knoblauch, Christian  |e verfasserin  |4 aut 
700 1 |a Jaeschke, Andrea  |e verfasserin  |4 aut 
700 1 |a Rethemeyer, Janet  |e verfasserin  |4 aut 
700 1 |a Kallmeyer, Jens  |e verfasserin  |4 aut 
700 1 |a Liebner, Susanne  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Global change biology  |d 1999  |g 29(2023), 10 vom: 27. Mai, Seite 2714-2731  |w (DE-627)NLM098239996  |x 1365-2486  |7 nnns 
773 1 8 |g volume:29  |g year:2023  |g number:10  |g day:27  |g month:05  |g pages:2714-2731 
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