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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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:38160 2023-12-03T10:16:49+01:00 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 (Prof. Dr.) Wagner, Dirk 2014 https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38160 https://doi.org/10.1371/journal.pone.0084761 eng eng https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38160 https://doi.org/10.1371/journal.pone.0084761 info:eu-repo/semantics/closedAccess Institut für Geowissenschaften article doc-type:article 2014 ftubpotsdam https://doi.org/10.1371/journal.pone.0084761 2023-11-05T23:35:04Z 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 University of Potsdam: publish.UP Arctic Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Yukon PLoS ONE 9 1 e84761 |
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University of Potsdam: publish.UP |
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ftubpotsdam |
language |
English |
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Institut für Geowissenschaften |
spellingShingle |
Institut für Geowissenschaften Frank-Fahle, Beatrice A. Yergeau, Etienne Greer, Charles W. Lantuit, Hugues (Prof. Dr.) Wagner, Dirk Microbial functional potential and community composition in permafrost-affected soils of the NW canadian arctic |
topic_facet |
Institut für Geowissenschaften |
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 |
Frank-Fahle, Beatrice A. Yergeau, Etienne Greer, Charles W. Lantuit, Hugues (Prof. Dr.) Wagner, Dirk |
author_facet |
Frank-Fahle, Beatrice A. Yergeau, Etienne Greer, Charles W. Lantuit, Hugues (Prof. Dr.) 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 |
publishDate |
2014 |
url |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38160 https://doi.org/10.1371/journal.pone.0084761 |
long_lat |
ENVELOPE(-139.089,-139.089,69.583,69.583) |
geographic |
Arctic Herschel Island Yukon |
geographic_facet |
Arctic Herschel Island Yukon |
genre |
Arctic Global warming Herschel Herschel Island permafrost Tundra Yukon |
genre_facet |
Arctic Global warming Herschel Herschel Island permafrost Tundra Yukon |
op_relation |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38160 https://doi.org/10.1371/journal.pone.0084761 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0084761 |
container_title |
PLoS ONE |
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9 |
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1 |
container_start_page |
e84761 |
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1784263757423181824 |