High peatland methane emissions following permafrost thaw: enhanced acetoclastic methanogenesis during early successional stages
Abstract 4) emissions, but the underlying controls responsible for increased emissions and the duration for which they persist have yet to be fully elucidated. We assessed how shifting environmental conditions affect microbial communities and the magnitude and stable isotopic signature (δ 13 4 emissions along a thermokarst bog transect in boreal western Canada. Thermokarst bogs develop following permafrost thaw when dry, elevated peat plateaus collapse and become saturated and dominated by Sphagnum ∼ ∼ δ 13 4 surface emissions and dissolved gas depth profiles show that hydrogenotrophic methanogenesis was the dominant pathway at both sites. However, mean δ 13 4 signatures of both dissolved gas profiles and surface CH4 emissions were found to be isotopically heavier in the young bog (- - - - 4 emissions of 82 mg CH4 m- 2 - 1 ∼ 4 m- 2 - 1 4 emissions in young thermokarst bogs but that these favourable conditions only persist for the initial decades after permafrost thaw.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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High peatland methane emissions following permafrost thaw: enhanced acetoclastic methanogenesis during early successional stages ; volume:19 ; number:12 ; year:2022 ; pages:3051-3071 ; extent:21
Biogeosciences ; 19, Heft 12 (2022), 3051-3071 (gesamt 21)
- Urheber
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Heffernan, Liam
Cavaco, Maria A.
Bhatia, Maya P.
Estop-Aragonés, Cristian
Knorr, Klaus-Holger
Olefeldt, David
- DOI
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10.5194/bg-19-3051-2022
- URN
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urn:nbn:de:101:1-2022063005240686168050
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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15.08.2025, 07:24 MESZ
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Beteiligte
- Heffernan, Liam
- Cavaco, Maria A.
- Bhatia, Maya P.
- Estop-Aragonés, Cristian
- Knorr, Klaus-Holger
- Olefeldt, David
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