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An active atmospheric methane sink in high Arctic mineral cryosols

Author(s): Lau, Maggie CY; Stackhouse, Brandon T; Layton, Alice C; Chauhan, Archana; Vishnivetskaya, Tatiana A; et al

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dc.contributor.authorLau, Maggie CY-
dc.contributor.authorStackhouse, Brandon T-
dc.contributor.authorLayton, Alice C-
dc.contributor.authorChauhan, Archana-
dc.contributor.authorVishnivetskaya, Tatiana A-
dc.contributor.authorChourey, Karuna-
dc.contributor.authorRonholm, Jennifer-
dc.contributor.authorMykytczuk, Nadia CS-
dc.contributor.authorBennett, Philip C-
dc.contributor.authorLamarche-Gagnon, Guillaume-
dc.contributor.authorBurton, Nancy-
dc.contributor.authorPollard, Wayne H-
dc.contributor.authorOmelon, Christopher R-
dc.contributor.authorMedvigy, David M-
dc.contributor.authorHettich, Robert L-
dc.contributor.authorPfiffner, Susan M-
dc.contributor.authorWhyte, Lyle G-
dc.contributor.authorOnstott, Tullis C-
dc.identifier.citationLau, Maggie C.Y., Brandon T. Stackhouse, Alice C. Layton, Archana Chauhan, Tatiana A. Vishnivetskaya, Karuna Chourey, Jennifer Ronholm et al. "An active atmospheric methane sink in high Arctic mineral cryosols." The ISME journal 9 (2015): 1880-1891. doi:10.1038/ismej.2015.13.en_US
dc.descriptionRelated Item links to Corrigendum, published 21 July 2015.en_US
dc.description.abstractMethane (CH4) emission by carbon-rich cryosols at the high latitudes in Northern Hemisphere has been studied extensively. In contrast, data on the CH4 emission potential of carbon-poor cryosols is limited, despite their spatial predominance. This work employs CH4 flux measurements in the field and under laboratory conditions to show that the mineral cryosols at Axel Heiberg Island in the Canadian high Arctic consistently consume atmospheric CH4. Omics analyses present the first molecular evidence of active atmospheric CH4-oxidizing bacteria (atmMOB) in permafrost-affected cryosols, with the prevalent atmMOB genotype in our acidic mineral cryosols being closely related to Upland Soil Cluster α. The atmospheric (atm) CH4 uptake at the study site increases with ground temperature between 0 °C and 18 °C. Consequently, the atm CH4 sink strength is predicted to increase by a factor of 5–30 as the Arctic warms by 5–15 °C over a century. We demonstrate that acidic mineral cryosols are a previously unrecognized potential of CH4 sink that requires further investigation to determine its potential impact on larger scales. This study also calls attention to the poleward distribution of atmMOB, as well as to the potential influence of microbial atm CH4 oxidation, in the context of regional CH4 flux models and global warming.en_US
dc.format.extent1880 - 1891en_US
dc.relation.ispartofThe ISME journalen_US
dc.rightsAuthor's manuscripten_US
dc.titleAn active atmospheric methane sink in high Arctic mineral cryosolsen_US
dc.typeJournal Articleen_US

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