Microbial diversity of active layer and permafrost in an acidic wetland from the Canadian High Arctic
The abundance and structure of archaeal and bacterial communities from the active layer and the associated permafrost of a moderately acidic (pH < 5.0) High Arctic wetland (Axel Heiberg Island, Nunavut, Canada) were investigated using culture- and molecular-based methods. Aerobic viable cell coun...
Published in: | Canadian Journal of Microbiology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2011
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Online Access: | https://doi.org/10.1139/w11-004 https://nrc-publications.canada.ca/eng/view/accepted/?id=f63374cc-17a5-402f-b884-183fbd517d3b https://nrc-publications.canada.ca/eng/view/object/?id=f63374cc-17a5-402f-b884-183fbd517d3b https://nrc-publications.canada.ca/fra/voir/objet/?id=f63374cc-17a5-402f-b884-183fbd517d3b |
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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:18525849 2023-05-15T14:50:25+02:00 Microbial diversity of active layer and permafrost in an acidic wetland from the Canadian High Arctic Wilhelm, Roland C. Niederberger, Thomas D. Greer, Charles Whyte, Lyle G. 2011-04-08 text https://doi.org/10.1139/w11-004 https://nrc-publications.canada.ca/eng/view/accepted/?id=f63374cc-17a5-402f-b884-183fbd517d3b https://nrc-publications.canada.ca/eng/view/object/?id=f63374cc-17a5-402f-b884-183fbd517d3b https://nrc-publications.canada.ca/fra/voir/objet/?id=f63374cc-17a5-402f-b884-183fbd517d3b eng eng Canadian Journal of Microbiology, Volume: 57, Issue: 4, Publication date: 2011-04-08, Pages: 303–315 doi:10.1139/w11-004 active layer permafrost wetland Arctic microbial diversity 16S rRNA gene library article 2011 ftnrccanada https://doi.org/10.1139/w11-004 2021-09-01T06:25:59Z The abundance and structure of archaeal and bacterial communities from the active layer and the associated permafrost of a moderately acidic (pH < 5.0) High Arctic wetland (Axel Heiberg Island, Nunavut, Canada) were investigated using culture- and molecular-based methods. Aerobic viable cell counts from the active layer were ~100-fold greater than those from the permafrost (2.5 × 105 CFU·(g soil dry mass)-1); however, a greater diversity of isolates were cultured from permafrost, as determined by 16S rRNA gene sequencing. Isolates from both layers demonstrated growth characteristics of a psychrotolerant, halotolerant, and acidotolerant community. Archaea constituted 0.1 percent of the total 16S rRNA gene copy umber and, in the 16S rRNA gene clone library, predominantly (71 percent and 95 percent) consisted of Crenarchaeota related to Group I. 1b. In contrast, bacterial communities were diverse (Shannon's diversity index, H = ~4), with Acidobacteria constituting the largest division of active layer clones (30 percent) and Actinobacteria most abundant in permafrost (28 percent). Direct comparisons of 16S rRNA gene sequence data highlighted significant differences between the bacterial communities of each layer, with the greatest differences occurring within Actinobacteria. Comparisons of 16S rRNA gene sequences with those from other Arctic permafrost and cold-temperature wetlands revealed commonly occurring taxa within the phyla Chloroflexi, Acidobacteria, and Actinobacteria (families Intrasporangiaceae and Rubrobacteraceae). Peer reviewed: Yes NRC publication: Yes Article in Journal/Newspaper Arctic Axel Heiberg Island Nunavut permafrost National Research Council Canada: NRC Publications Archive Arctic Nunavut Canada Heiberg ENVELOPE(13.964,13.964,66.424,66.424) Axel Heiberg Island ENVELOPE(-91.001,-91.001,79.752,79.752) Canadian Journal of Microbiology 57 4 303 315 |
institution |
Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
op_collection_id |
ftnrccanada |
language |
English |
topic |
active layer permafrost wetland Arctic microbial diversity 16S rRNA gene library |
spellingShingle |
active layer permafrost wetland Arctic microbial diversity 16S rRNA gene library Wilhelm, Roland C. Niederberger, Thomas D. Greer, Charles Whyte, Lyle G. Microbial diversity of active layer and permafrost in an acidic wetland from the Canadian High Arctic |
topic_facet |
active layer permafrost wetland Arctic microbial diversity 16S rRNA gene library |
description |
The abundance and structure of archaeal and bacterial communities from the active layer and the associated permafrost of a moderately acidic (pH < 5.0) High Arctic wetland (Axel Heiberg Island, Nunavut, Canada) were investigated using culture- and molecular-based methods. Aerobic viable cell counts from the active layer were ~100-fold greater than those from the permafrost (2.5 × 105 CFU·(g soil dry mass)-1); however, a greater diversity of isolates were cultured from permafrost, as determined by 16S rRNA gene sequencing. Isolates from both layers demonstrated growth characteristics of a psychrotolerant, halotolerant, and acidotolerant community. Archaea constituted 0.1 percent of the total 16S rRNA gene copy umber and, in the 16S rRNA gene clone library, predominantly (71 percent and 95 percent) consisted of Crenarchaeota related to Group I. 1b. In contrast, bacterial communities were diverse (Shannon's diversity index, H = ~4), with Acidobacteria constituting the largest division of active layer clones (30 percent) and Actinobacteria most abundant in permafrost (28 percent). Direct comparisons of 16S rRNA gene sequence data highlighted significant differences between the bacterial communities of each layer, with the greatest differences occurring within Actinobacteria. Comparisons of 16S rRNA gene sequences with those from other Arctic permafrost and cold-temperature wetlands revealed commonly occurring taxa within the phyla Chloroflexi, Acidobacteria, and Actinobacteria (families Intrasporangiaceae and Rubrobacteraceae). Peer reviewed: Yes NRC publication: Yes |
format |
Article in Journal/Newspaper |
author |
Wilhelm, Roland C. Niederberger, Thomas D. Greer, Charles Whyte, Lyle G. |
author_facet |
Wilhelm, Roland C. Niederberger, Thomas D. Greer, Charles Whyte, Lyle G. |
author_sort |
Wilhelm, Roland C. |
title |
Microbial diversity of active layer and permafrost in an acidic wetland from the Canadian High Arctic |
title_short |
Microbial diversity of active layer and permafrost in an acidic wetland from the Canadian High Arctic |
title_full |
Microbial diversity of active layer and permafrost in an acidic wetland from the Canadian High Arctic |
title_fullStr |
Microbial diversity of active layer and permafrost in an acidic wetland from the Canadian High Arctic |
title_full_unstemmed |
Microbial diversity of active layer and permafrost in an acidic wetland from the Canadian High Arctic |
title_sort |
microbial diversity of active layer and permafrost in an acidic wetland from the canadian high arctic |
publishDate |
2011 |
url |
https://doi.org/10.1139/w11-004 https://nrc-publications.canada.ca/eng/view/accepted/?id=f63374cc-17a5-402f-b884-183fbd517d3b https://nrc-publications.canada.ca/eng/view/object/?id=f63374cc-17a5-402f-b884-183fbd517d3b https://nrc-publications.canada.ca/fra/voir/objet/?id=f63374cc-17a5-402f-b884-183fbd517d3b |
long_lat |
ENVELOPE(13.964,13.964,66.424,66.424) ENVELOPE(-91.001,-91.001,79.752,79.752) |
geographic |
Arctic Nunavut Canada Heiberg Axel Heiberg Island |
geographic_facet |
Arctic Nunavut Canada Heiberg Axel Heiberg Island |
genre |
Arctic Axel Heiberg Island Nunavut permafrost |
genre_facet |
Arctic Axel Heiberg Island Nunavut permafrost |
op_relation |
Canadian Journal of Microbiology, Volume: 57, Issue: 4, Publication date: 2011-04-08, Pages: 303–315 doi:10.1139/w11-004 |
op_doi |
https://doi.org/10.1139/w11-004 |
container_title |
Canadian Journal of Microbiology |
container_volume |
57 |
container_issue |
4 |
container_start_page |
303 |
op_container_end_page |
315 |
_version_ |
1766321449998483456 |