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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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:21272710 2023-05-15T14:03:10+02:00 Microbial functional potential and community composition in permafrost-affected soils of the NW Canadian Arctic Frank-Fahle, Beatrice A. Yergeau, Etienne Greer, Charles W. Lantuit, Hugues Wagner, Dirk 2014-01-08 text https://doi.org/10.1371/journal.pone.0084761 https://nrc-publications.canada.ca/eng/view/object/?id=4075dadb-2699-44b2-a0c2-d2413a664cbc https://nrc-publications.canada.ca/fra/voir/objet/?id=4075dadb-2699-44b2-a0c2-d2413a664cbc eng eng PLOS issn:1932-6203 PLoS ONE, Volume: 9, Issue: 1, Publication date: 2014-01-08 doi:10.1371/journal.pone.0084761 carbon nitrogen RNA 16S amplicon Archean arctic tundra bacterial gene Candida antarctica carbon cycling climate change environmental factor gene function gene identification genetic heterogeneity geographic distribution microbial community molecular dynamics nitrogen cycling permafrost polymerase chain reaction quantitative analysis sequence analysis soil analysis species composition species diversity species richness Arctic Regions Cold Temperature Soil Microbiology article 2014 ftnrccanada https://doi.org/10.1371/journal.pone.0084761 2021-09-18T23:00:17Z 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. Peer reviewed: Yes NRC publication: Yes Article in Journal/Newspaper Antarc* Antarctica Arctic Climate change Global warming Herschel Herschel Island permafrost Tundra Yukon National Research Council Canada: NRC Publications Archive Arctic Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Yukon PLoS ONE 9 1 e84761 |
institution |
Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
op_collection_id |
ftnrccanada |
language |
English |
topic |
carbon nitrogen RNA 16S amplicon Archean arctic tundra bacterial gene Candida antarctica carbon cycling climate change environmental factor gene function gene identification genetic heterogeneity geographic distribution microbial community molecular dynamics nitrogen cycling permafrost polymerase chain reaction quantitative analysis sequence analysis soil analysis species composition species diversity species richness Arctic Regions Cold Temperature Soil Microbiology |
spellingShingle |
carbon nitrogen RNA 16S amplicon Archean arctic tundra bacterial gene Candida antarctica carbon cycling climate change environmental factor gene function gene identification genetic heterogeneity geographic distribution microbial community molecular dynamics nitrogen cycling permafrost polymerase chain reaction quantitative analysis sequence analysis soil analysis species composition species diversity species richness Arctic Regions Cold Temperature Soil Microbiology Frank-Fahle, Beatrice A. Yergeau, Etienne Greer, Charles W. Lantuit, Hugues Wagner, Dirk Microbial functional potential and community composition in permafrost-affected soils of the NW Canadian Arctic |
topic_facet |
carbon nitrogen RNA 16S amplicon Archean arctic tundra bacterial gene Candida antarctica carbon cycling climate change environmental factor gene function gene identification genetic heterogeneity geographic distribution microbial community molecular dynamics nitrogen cycling permafrost polymerase chain reaction quantitative analysis sequence analysis soil analysis species composition species diversity species richness Arctic Regions Cold Temperature Soil Microbiology |
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. Peer reviewed: Yes NRC publication: Yes |
format |
Article in Journal/Newspaper |
author |
Frank-Fahle, Beatrice A. Yergeau, Etienne Greer, Charles W. Lantuit, Hugues Wagner, Dirk |
author_facet |
Frank-Fahle, Beatrice A. Yergeau, Etienne Greer, Charles W. Lantuit, Hugues Wagner, Dirk |
author_sort |
Frank-Fahle, Beatrice A. |
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 |
PLOS |
publishDate |
2014 |
url |
https://doi.org/10.1371/journal.pone.0084761 https://nrc-publications.canada.ca/eng/view/object/?id=4075dadb-2699-44b2-a0c2-d2413a664cbc https://nrc-publications.canada.ca/fra/voir/objet/?id=4075dadb-2699-44b2-a0c2-d2413a664cbc |
long_lat |
ENVELOPE(-139.089,-139.089,69.583,69.583) |
geographic |
Arctic Herschel Island Yukon |
geographic_facet |
Arctic Herschel Island Yukon |
genre |
Antarc* Antarctica Arctic Climate change Global warming Herschel Herschel Island permafrost Tundra Yukon |
genre_facet |
Antarc* Antarctica Arctic Climate change Global warming Herschel Herschel Island permafrost Tundra Yukon |
op_relation |
issn:1932-6203 PLoS ONE, Volume: 9, Issue: 1, Publication date: 2014-01-08 doi:10.1371/journal.pone.0084761 |
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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1766273727712985088 |