Microbial functional potential and community composition in permafrost-affected soils of the NW Canadian Arctic.
Permafrost-affected soils are among the most obvious ecosystems in which current microbial controls on organic matter decomposition are changing as a result of global warming. Warmer conditions in polygonal tundra will lead to a deepening of the seasonal active layer, provoking changes in microbial...
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ftdoajarticles:oai:doaj.org/article:b2b177a859fd433e9a1c6d9d6fe5a864 2023-05-15T14:52:34+02:00 Microbial functional potential and community composition in permafrost-affected soils of the NW Canadian Arctic. Béatrice A Frank-Fahle Etienne Yergeau Charles W Greer Hugues Lantuit Dirk Wagner 2014-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0084761 https://doaj.org/article/b2b177a859fd433e9a1c6d9d6fe5a864 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3885591?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0084761 https://doaj.org/article/b2b177a859fd433e9a1c6d9d6fe5a864 PLoS ONE, Vol 9, Iss 1, p e84761 (2014) Medicine R Science Q article 2014 ftdoajarticles https://doi.org/10.1371/journal.pone.0084761 2022-12-31T12:05:58Z Permafrost-affected soils are among the most obvious ecosystems in which current microbial controls on organic matter decomposition are changing as a result of global warming. Warmer conditions in polygonal tundra will lead to a deepening of the seasonal active layer, provoking changes in microbial processes and possibly resulting in exacerbated carbon degradation under increasing anoxic conditions. To identify current microbial assemblages in carbon rich, water saturated permafrost environments, four polygonal tundra sites were investigated on Herschel Island and the Yukon Coast, Western Canadian Arctic. Ion Torrent sequencing of bacterial and archaeal 16S rRNA amplicons revealed the presence of all major microbial soil groups and indicated a local, vertical heterogeneity of the polygonal tundra soil community with increasing depth. Microbial diversity was found to be highest in the surface layers, decreasing towards the permafrost table. Quantitative PCR analysis of functional genes involved in carbon and nitrogen-cycling revealed a high functional potential in the surface layers, decreasing with increasing active layer depth. We observed that soil properties driving microbial diversity and functional potential varied in each study site. These results highlight the small-scale heterogeneity of geomorphologically comparable sites, greatly restricting generalizations about the fate of permafrost-affected environments in a warming Arctic. Article in Journal/Newspaper Arctic Global warming Herschel Herschel Island permafrost Tundra Yukon Directory of Open Access Journals: DOAJ Articles Arctic Yukon Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) PLoS ONE 9 1 e84761 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Béatrice A Frank-Fahle Etienne Yergeau Charles W Greer Hugues Lantuit Dirk Wagner Microbial functional potential and community composition in permafrost-affected soils of the NW Canadian Arctic. |
topic_facet |
Medicine R Science Q |
description |
Permafrost-affected soils are among the most obvious ecosystems in which current microbial controls on organic matter decomposition are changing as a result of global warming. Warmer conditions in polygonal tundra will lead to a deepening of the seasonal active layer, provoking changes in microbial processes and possibly resulting in exacerbated carbon degradation under increasing anoxic conditions. To identify current microbial assemblages in carbon rich, water saturated permafrost environments, four polygonal tundra sites were investigated on Herschel Island and the Yukon Coast, Western Canadian Arctic. Ion Torrent sequencing of bacterial and archaeal 16S rRNA amplicons revealed the presence of all major microbial soil groups and indicated a local, vertical heterogeneity of the polygonal tundra soil community with increasing depth. Microbial diversity was found to be highest in the surface layers, decreasing towards the permafrost table. Quantitative PCR analysis of functional genes involved in carbon and nitrogen-cycling revealed a high functional potential in the surface layers, decreasing with increasing active layer depth. We observed that soil properties driving microbial diversity and functional potential varied in each study site. These results highlight the small-scale heterogeneity of geomorphologically comparable sites, greatly restricting generalizations about the fate of permafrost-affected environments in a warming Arctic. |
format |
Article in Journal/Newspaper |
author |
Béatrice A Frank-Fahle Etienne Yergeau Charles W Greer Hugues Lantuit Dirk Wagner |
author_facet |
Béatrice A Frank-Fahle Etienne Yergeau Charles W Greer Hugues Lantuit Dirk Wagner |
author_sort |
Béatrice A Frank-Fahle |
title |
Microbial functional potential and community composition in permafrost-affected soils of the NW Canadian Arctic. |
title_short |
Microbial functional potential and community composition in permafrost-affected soils of the NW Canadian Arctic. |
title_full |
Microbial functional potential and community composition in permafrost-affected soils of the NW Canadian Arctic. |
title_fullStr |
Microbial functional potential and community composition in permafrost-affected soils of the NW Canadian Arctic. |
title_full_unstemmed |
Microbial functional potential and community composition in permafrost-affected soils of the NW Canadian Arctic. |
title_sort |
microbial functional potential and community composition in permafrost-affected soils of the nw canadian arctic. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
https://doi.org/10.1371/journal.pone.0084761 https://doaj.org/article/b2b177a859fd433e9a1c6d9d6fe5a864 |
long_lat |
ENVELOPE(-139.089,-139.089,69.583,69.583) |
geographic |
Arctic Yukon Herschel Island |
geographic_facet |
Arctic Yukon Herschel Island |
genre |
Arctic Global warming Herschel Herschel Island permafrost Tundra Yukon |
genre_facet |
Arctic Global warming Herschel Herschel Island permafrost Tundra Yukon |
op_source |
PLoS ONE, Vol 9, Iss 1, p e84761 (2014) |
op_relation |
http://europepmc.org/articles/PMC3885591?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0084761 https://doaj.org/article/b2b177a859fd433e9a1c6d9d6fe5a864 |
op_doi |
https://doi.org/10.1371/journal.pone.0084761 |
container_title |
PLoS ONE |
container_volume |
9 |
container_issue |
1 |
container_start_page |
e84761 |
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1766323804890464256 |