Small thaw ponds: An unaccounted source of methane in the Canadian high Arctic.
Thawing permafrost in the Canadian Arctic tundra leads to peat erosion and slumping in narrow and shallow runnel ponds that surround more commonly studied polygonal ponds. Here we compared the methane production between runnel and polygonal ponds using stable isotope ratios, 14C signatures, and inve...
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Online Access: | https://espace.inrs.ca/id/eprint/3731/ https://espace.inrs.ca/id/eprint/3731/1/P2376.pdf https://doi.org/10.1371/journal.pone.0078204 |
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ftinrsquebec:oai:espace.inrs.ca:3731 2023-05-15T14:26:22+02:00 Small thaw ponds: An unaccounted source of methane in the Canadian high Arctic. Negandhi, Karita Laurion, Isabelle Whiticar, Michael J. Galand, Pierre E. Xu, Xiaomei Lovejoy, Connie 2013 application/pdf https://espace.inrs.ca/id/eprint/3731/ https://espace.inrs.ca/id/eprint/3731/1/P2376.pdf https://doi.org/10.1371/journal.pone.0078204 en eng https://espace.inrs.ca/id/eprint/3731/1/P2376.pdf Negandhi, Karita, Laurion, Isabelle, Whiticar, Michael J., Galand, Pierre E., Xu, Xiaomei et Lovejoy, Connie (2013). Small thaw ponds: An unaccounted source of methane in the Canadian high Arctic. PLoS ONE , vol. 8 , nº 11. e78204. DOI:10.1371/journal.pone.0078204 <https://doi.org/10.1371/journal.pone.0078204>. doi:10.1371/journal.pone.0078204 Arctic regions Canada carbon dioxide genes archaeal global warming methane methanobacterium molecular typing Article Évalué par les pairs 2013 ftinrsquebec https://doi.org/10.1371/journal.pone.0078204 2023-02-10T11:42:39Z Thawing permafrost in the Canadian Arctic tundra leads to peat erosion and slumping in narrow and shallow runnel ponds that surround more commonly studied polygonal ponds. Here we compared the methane production between runnel and polygonal ponds using stable isotope ratios, 14C signatures, and investigated potential methanogenic communities through high-throughput sequencing archaeal 16S rRNA genes. We found that runnel ponds had significantly higher methane and carbon dioxide emissions, produced from a slightly larger fraction of old carbon, compared to polygonal ponds. The methane stable isotopic signature indicated production through acetoclastic methanogenesis, but gene signatures from acetoclastic and hydrogenotrophic methanogenic Archaea were detected in both polygonal and runnel ponds. We conclude that runnel ponds represent a source of methane from potentially older C, and that they contain methanogenic communities able to use diverse sources of carbon, increasing the risk of augmented methane release under a warmer climate. Article in Journal/Newspaper Arctic Arctic Global warming permafrost Tundra Institut national de la recherche scientifique, Québec: Espace INRS Arctic Canada PLoS ONE 8 11 e78204 |
institution |
Open Polar |
collection |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
English |
topic |
Arctic regions Canada carbon dioxide genes archaeal global warming methane methanobacterium molecular typing |
spellingShingle |
Arctic regions Canada carbon dioxide genes archaeal global warming methane methanobacterium molecular typing Negandhi, Karita Laurion, Isabelle Whiticar, Michael J. Galand, Pierre E. Xu, Xiaomei Lovejoy, Connie Small thaw ponds: An unaccounted source of methane in the Canadian high Arctic. |
topic_facet |
Arctic regions Canada carbon dioxide genes archaeal global warming methane methanobacterium molecular typing |
description |
Thawing permafrost in the Canadian Arctic tundra leads to peat erosion and slumping in narrow and shallow runnel ponds that surround more commonly studied polygonal ponds. Here we compared the methane production between runnel and polygonal ponds using stable isotope ratios, 14C signatures, and investigated potential methanogenic communities through high-throughput sequencing archaeal 16S rRNA genes. We found that runnel ponds had significantly higher methane and carbon dioxide emissions, produced from a slightly larger fraction of old carbon, compared to polygonal ponds. The methane stable isotopic signature indicated production through acetoclastic methanogenesis, but gene signatures from acetoclastic and hydrogenotrophic methanogenic Archaea were detected in both polygonal and runnel ponds. We conclude that runnel ponds represent a source of methane from potentially older C, and that they contain methanogenic communities able to use diverse sources of carbon, increasing the risk of augmented methane release under a warmer climate. |
format |
Article in Journal/Newspaper |
author |
Negandhi, Karita Laurion, Isabelle Whiticar, Michael J. Galand, Pierre E. Xu, Xiaomei Lovejoy, Connie |
author_facet |
Negandhi, Karita Laurion, Isabelle Whiticar, Michael J. Galand, Pierre E. Xu, Xiaomei Lovejoy, Connie |
author_sort |
Negandhi, Karita |
title |
Small thaw ponds: An unaccounted source of methane in the Canadian high Arctic. |
title_short |
Small thaw ponds: An unaccounted source of methane in the Canadian high Arctic. |
title_full |
Small thaw ponds: An unaccounted source of methane in the Canadian high Arctic. |
title_fullStr |
Small thaw ponds: An unaccounted source of methane in the Canadian high Arctic. |
title_full_unstemmed |
Small thaw ponds: An unaccounted source of methane in the Canadian high Arctic. |
title_sort |
small thaw ponds: an unaccounted source of methane in the canadian high arctic. |
publishDate |
2013 |
url |
https://espace.inrs.ca/id/eprint/3731/ https://espace.inrs.ca/id/eprint/3731/1/P2376.pdf https://doi.org/10.1371/journal.pone.0078204 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic Arctic Global warming permafrost Tundra |
genre_facet |
Arctic Arctic Global warming permafrost Tundra |
op_relation |
https://espace.inrs.ca/id/eprint/3731/1/P2376.pdf Negandhi, Karita, Laurion, Isabelle, Whiticar, Michael J., Galand, Pierre E., Xu, Xiaomei et Lovejoy, Connie (2013). Small thaw ponds: An unaccounted source of methane in the Canadian high Arctic. PLoS ONE , vol. 8 , nº 11. e78204. DOI:10.1371/journal.pone.0078204 <https://doi.org/10.1371/journal.pone.0078204>. doi:10.1371/journal.pone.0078204 |
op_doi |
https://doi.org/10.1371/journal.pone.0078204 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
11 |
container_start_page |
e78204 |
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1766298889218949120 |