Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year
As a contribution to the International Polar Year program MERGE (Microbiological and Ecological Responses to Global Environmental change in polar regions), studies were conducted on the terrestrial and aquatic microbial ecosystems of northern Canada (details at: http://www.cen.ulaval.ca/merge/). The...
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Format: | Article in Journal/Newspaper |
Language: | English |
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2009
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Online Access: | https://doi.org/10.1016/j.polar.2009.05.004 https://nrc-publications.canada.ca/eng/view/accepted/?id=459ef8cd-7c13-404a-a6bf-a31dd39c4866 https://nrc-publications.canada.ca/eng/view/object/?id=459ef8cd-7c13-404a-a6bf-a31dd39c4866 https://nrc-publications.canada.ca/fra/voir/objet/?id=459ef8cd-7c13-404a-a6bf-a31dd39c4866 |
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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:14148121 2023-05-15T14:29:30+02:00 Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year Vincent, Warwick F. Whyte, Lyle G. Lovejoy, Connie Greer, Charles W. Laurion, Isabelle Suttle, Curtis A. Corbeil, Jacques Mueller, Derek R. 2009-11 text https://doi.org/10.1016/j.polar.2009.05.004 https://nrc-publications.canada.ca/eng/view/accepted/?id=459ef8cd-7c13-404a-a6bf-a31dd39c4866 https://nrc-publications.canada.ca/eng/view/object/?id=459ef8cd-7c13-404a-a6bf-a31dd39c4866 https://nrc-publications.canada.ca/fra/voir/objet/?id=459ef8cd-7c13-404a-a6bf-a31dd39c4866 eng eng Polar Science, Volume: 3, Issue: 3, Publication date: 2009-11, Pages: 171–180 doi:10.1016/j.polar.2009.05.004 Arctic biodiversity climate change ecosystems ice microbiology permafrost environment article 2009 ftnrccanada https://doi.org/10.1016/j.polar.2009.05.004 2021-09-01T06:23:40Z As a contribution to the International Polar Year program MERGE (Microbiological and Ecological Responses to Global Environmental change in polar regions), studies were conducted on the terrestrial and aquatic microbial ecosystems of northern Canada (details at: http://www.cen.ulaval.ca/merge/). The habitats included permafrost soils, saline coldwater springs, supraglacial lakes on ice shelves, epishelf lakes in fjords, deep meromictic lakes, and shallow lakes, ponds and streams. Microbiological samples from each habitat were analysed by HPLC pigment assays, light and fluorescence microscopy, and DNA sequencing. The results show a remarkably diverse microflora of viruses, Archaea (including ammonium oxidisers and methanotrophs), Bacteria (including filamentous sulfur-oxidisers in a saline spring and benthic mats of Cyanobacteria in many waterbodies), and protists (including microbial eukaryotes in snowbanks and ciliates in ice-dammed lakes). In summer 2008, we recorded extreme warming at Ward Hunt Island and vicinity, the northern limit of the Canadian high Arctic, with air temperatures up to 20.5 °C. This was accompanied by pronounced changes in microbial habitats: deepening of the permafrost active layer; loss of perennial lake ice and sea ice; loss of ice-dammed freshwater lakes; and 23% loss of total ice shelf area, including complete break-up and loss of the Markham Ice Shelf cryo-ecosystem. These observations underscore the vulnerability of Arctic microbial ecosystems to ongoing climate change. Peer reviewed: Yes NRC publication: Yes Article in Journal/Newspaper Arctic biodiversity Arctic Climate change Ice Ice Shelf Ice Shelves International Polar Year Markham Ice Shelf permafrost Polar Science Polar Science Sea ice Ward Hunt Island National Research Council Canada: NRC Publications Archive Arctic Canada Hunt Island ENVELOPE(-100.601,-100.601,58.788,58.788) Markham ENVELOPE(-57.358,-57.358,-64.296,-64.296) Ward Hunt Island ENVELOPE(-74.161,-74.161,83.102,83.102) Polar Science 3 3 171 180 |
institution |
Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
op_collection_id |
ftnrccanada |
language |
English |
topic |
Arctic biodiversity climate change ecosystems ice microbiology permafrost environment |
spellingShingle |
Arctic biodiversity climate change ecosystems ice microbiology permafrost environment Vincent, Warwick F. Whyte, Lyle G. Lovejoy, Connie Greer, Charles W. Laurion, Isabelle Suttle, Curtis A. Corbeil, Jacques Mueller, Derek R. Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year |
topic_facet |
Arctic biodiversity climate change ecosystems ice microbiology permafrost environment |
description |
As a contribution to the International Polar Year program MERGE (Microbiological and Ecological Responses to Global Environmental change in polar regions), studies were conducted on the terrestrial and aquatic microbial ecosystems of northern Canada (details at: http://www.cen.ulaval.ca/merge/). The habitats included permafrost soils, saline coldwater springs, supraglacial lakes on ice shelves, epishelf lakes in fjords, deep meromictic lakes, and shallow lakes, ponds and streams. Microbiological samples from each habitat were analysed by HPLC pigment assays, light and fluorescence microscopy, and DNA sequencing. The results show a remarkably diverse microflora of viruses, Archaea (including ammonium oxidisers and methanotrophs), Bacteria (including filamentous sulfur-oxidisers in a saline spring and benthic mats of Cyanobacteria in many waterbodies), and protists (including microbial eukaryotes in snowbanks and ciliates in ice-dammed lakes). In summer 2008, we recorded extreme warming at Ward Hunt Island and vicinity, the northern limit of the Canadian high Arctic, with air temperatures up to 20.5 °C. This was accompanied by pronounced changes in microbial habitats: deepening of the permafrost active layer; loss of perennial lake ice and sea ice; loss of ice-dammed freshwater lakes; and 23% loss of total ice shelf area, including complete break-up and loss of the Markham Ice Shelf cryo-ecosystem. These observations underscore the vulnerability of Arctic microbial ecosystems to ongoing climate change. Peer reviewed: Yes NRC publication: Yes |
format |
Article in Journal/Newspaper |
author |
Vincent, Warwick F. Whyte, Lyle G. Lovejoy, Connie Greer, Charles W. Laurion, Isabelle Suttle, Curtis A. Corbeil, Jacques Mueller, Derek R. |
author_facet |
Vincent, Warwick F. Whyte, Lyle G. Lovejoy, Connie Greer, Charles W. Laurion, Isabelle Suttle, Curtis A. Corbeil, Jacques Mueller, Derek R. |
author_sort |
Vincent, Warwick F. |
title |
Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year |
title_short |
Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year |
title_full |
Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year |
title_fullStr |
Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year |
title_full_unstemmed |
Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year |
title_sort |
arctic microbial ecosystems and impacts of extreme warming during the international polar year |
publishDate |
2009 |
url |
https://doi.org/10.1016/j.polar.2009.05.004 https://nrc-publications.canada.ca/eng/view/accepted/?id=459ef8cd-7c13-404a-a6bf-a31dd39c4866 https://nrc-publications.canada.ca/eng/view/object/?id=459ef8cd-7c13-404a-a6bf-a31dd39c4866 https://nrc-publications.canada.ca/fra/voir/objet/?id=459ef8cd-7c13-404a-a6bf-a31dd39c4866 |
long_lat |
ENVELOPE(-100.601,-100.601,58.788,58.788) ENVELOPE(-57.358,-57.358,-64.296,-64.296) ENVELOPE(-74.161,-74.161,83.102,83.102) |
geographic |
Arctic Canada Hunt Island Markham Ward Hunt Island |
geographic_facet |
Arctic Canada Hunt Island Markham Ward Hunt Island |
genre |
Arctic biodiversity Arctic Climate change Ice Ice Shelf Ice Shelves International Polar Year Markham Ice Shelf permafrost Polar Science Polar Science Sea ice Ward Hunt Island |
genre_facet |
Arctic biodiversity Arctic Climate change Ice Ice Shelf Ice Shelves International Polar Year Markham Ice Shelf permafrost Polar Science Polar Science Sea ice Ward Hunt Island |
op_relation |
Polar Science, Volume: 3, Issue: 3, Publication date: 2009-11, Pages: 171–180 doi:10.1016/j.polar.2009.05.004 |
op_doi |
https://doi.org/10.1016/j.polar.2009.05.004 |
container_title |
Polar Science |
container_volume |
3 |
container_issue |
3 |
container_start_page |
171 |
op_container_end_page |
180 |
_version_ |
1766303499180572672 |