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/ ). Th...
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Online Access: | https://espace.inrs.ca/id/eprint/10743/ https://doi.org/10.1016/j.polar.2009.05.004 |
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ftinrsquebec:oai:espace.inrs.ca:10743 2023-05-15T14:26:26+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 https://espace.inrs.ca/id/eprint/10743/ https://doi.org/10.1016/j.polar.2009.05.004 unknown Vincent, Warwick F., Whyte, Lyle G., Lovejoy, Connie, Greer, Charles W., Laurion, Isabelle, Suttle, Curtis A., Corbeil, Jacques et Mueller, Derek R. (2009). Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year. Polar Science , vol. 3 , nº 3. p. 171-180. DOI:10.1016/j.polar.2009.05.004 <https://doi.org/10.1016/j.polar.2009.05.004>. doi:10.1016/j.polar.2009.05.004 Arctic biodiversity climate change ecosystems ice microbiology permafrost Article Évalué par les pairs 2009 ftinrsquebec https://doi.org/10.1016/j.polar.2009.05.004 2023-02-10T11:46:18Z 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. Article in Journal/Newspaper Arctic 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 Institut national de la recherche scientifique, Québec: Espace INRS 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 |
Institut national de la recherche scientifique, Québec: Espace INRS |
op_collection_id |
ftinrsquebec |
language |
unknown |
topic |
Arctic biodiversity climate change ecosystems ice microbiology permafrost |
spellingShingle |
Arctic biodiversity climate change ecosystems ice microbiology permafrost 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 |
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. |
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://espace.inrs.ca/id/eprint/10743/ https://doi.org/10.1016/j.polar.2009.05.004 |
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 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 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 |
Vincent, Warwick F., Whyte, Lyle G., Lovejoy, Connie, Greer, Charles W., Laurion, Isabelle, Suttle, Curtis A., Corbeil, Jacques et Mueller, Derek R. (2009). Arctic microbial ecosystems and impacts of extreme warming during the International Polar Year. Polar Science , vol. 3 , nº 3. p. 171-180. DOI:10.1016/j.polar.2009.05.004 <https://doi.org/10.1016/j.polar.2009.05.004>. 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_ |
1766299003865006080 |