Gradient analysis of cryoconite ecosystems from two polar glaciers
The cylindrical meltholes present in the ablation zones of many glaciers (termed cryoconite holes) contain complex microbial communities. A canonical correspondence analysis (CCA) of community structure and environmental gradients for cryoconite holes on two glaciers was undertaken. The Canada Glaci...
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ftcarletonunivir:oai:carleton.ca:25888 2023-05-15T13:42:01+02:00 Gradient analysis of cryoconite ecosystems from two polar glaciers Mueller, D. (Derek) Pollard, W.H. (W. H.) 2004-01-01 https://ir.library.carleton.ca/pub/25888 https://doi.org/10.1007/s00300-003-0580-2 en eng https://ir.library.carleton.ca/pub/25888 doi:10.1007/s00300-003-0580-2 Polar Biology vol. 27 no. 2, pp. 66-74 info:eu-repo/semantics/article 2004 ftcarletonunivir https://doi.org/10.1007/s00300-003-0580-2 2022-02-06T21:51:19Z The cylindrical meltholes present in the ablation zones of many glaciers (termed cryoconite holes) contain complex microbial communities. A canonical correspondence analysis (CCA) of community structure and environmental gradients for cryoconite holes on two glaciers was undertaken. The Canada Glacier (77°37′S, 162°55′E) is located in the McMurdo Dry Valleys of Antarctica. The White Glacier (79°27′N, 90°40′W) is located on Axel Heiberg Island, Nunavut Territory, Canada. These glaciers are at similar, yet antipodal latitudes, are roughly the same size and endure approximately the same mean annual temperature. The Canada Glacier cryoconite communities were found to be significantly (P = 0-001) associated with six environmental variables, which together explained 55% of the biological variation. The White Glacier cryoconite communities were not significantly associated with environmental variables. The differences in CCA results were attributed to the relative amount of disturbance and isolation between each glacier's cryoconite holes. Canada Glacier cryoconite holes were mostly ice-covered and undisturbed by meltwater flow, whereas high meltwater production and open cryoconite holes on the White Glacier may continually reset the community structure and habitat variability due to inter-hole mixing. Article in Journal/Newspaper Antarc* Antarctica Axel Heiberg Island Canada Glacier glacier* McMurdo Dry Valleys Nunavut Polar Biology Carleton University's Institutional Repository Axel Heiberg Island ENVELOPE(-91.001,-91.001,79.752,79.752) Canada Canada Glacier ENVELOPE(162.983,162.983,-77.617,-77.617) Heiberg ENVELOPE(13.964,13.964,66.424,66.424) McMurdo Dry Valleys Nunavut White Glacier ENVELOPE(-90.667,-90.667,79.447,79.447) Polar Biology 27 2 66 74 |
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Open Polar |
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Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
language |
English |
description |
The cylindrical meltholes present in the ablation zones of many glaciers (termed cryoconite holes) contain complex microbial communities. A canonical correspondence analysis (CCA) of community structure and environmental gradients for cryoconite holes on two glaciers was undertaken. The Canada Glacier (77°37′S, 162°55′E) is located in the McMurdo Dry Valleys of Antarctica. The White Glacier (79°27′N, 90°40′W) is located on Axel Heiberg Island, Nunavut Territory, Canada. These glaciers are at similar, yet antipodal latitudes, are roughly the same size and endure approximately the same mean annual temperature. The Canada Glacier cryoconite communities were found to be significantly (P = 0-001) associated with six environmental variables, which together explained 55% of the biological variation. The White Glacier cryoconite communities were not significantly associated with environmental variables. The differences in CCA results were attributed to the relative amount of disturbance and isolation between each glacier's cryoconite holes. Canada Glacier cryoconite holes were mostly ice-covered and undisturbed by meltwater flow, whereas high meltwater production and open cryoconite holes on the White Glacier may continually reset the community structure and habitat variability due to inter-hole mixing. |
format |
Article in Journal/Newspaper |
author |
Mueller, D. (Derek) Pollard, W.H. (W. H.) |
spellingShingle |
Mueller, D. (Derek) Pollard, W.H. (W. H.) Gradient analysis of cryoconite ecosystems from two polar glaciers |
author_facet |
Mueller, D. (Derek) Pollard, W.H. (W. H.) |
author_sort |
Mueller, D. (Derek) |
title |
Gradient analysis of cryoconite ecosystems from two polar glaciers |
title_short |
Gradient analysis of cryoconite ecosystems from two polar glaciers |
title_full |
Gradient analysis of cryoconite ecosystems from two polar glaciers |
title_fullStr |
Gradient analysis of cryoconite ecosystems from two polar glaciers |
title_full_unstemmed |
Gradient analysis of cryoconite ecosystems from two polar glaciers |
title_sort |
gradient analysis of cryoconite ecosystems from two polar glaciers |
publishDate |
2004 |
url |
https://ir.library.carleton.ca/pub/25888 https://doi.org/10.1007/s00300-003-0580-2 |
long_lat |
ENVELOPE(-91.001,-91.001,79.752,79.752) ENVELOPE(162.983,162.983,-77.617,-77.617) ENVELOPE(13.964,13.964,66.424,66.424) ENVELOPE(-90.667,-90.667,79.447,79.447) |
geographic |
Axel Heiberg Island Canada Canada Glacier Heiberg McMurdo Dry Valleys Nunavut White Glacier |
geographic_facet |
Axel Heiberg Island Canada Canada Glacier Heiberg McMurdo Dry Valleys Nunavut White Glacier |
genre |
Antarc* Antarctica Axel Heiberg Island Canada Glacier glacier* McMurdo Dry Valleys Nunavut Polar Biology |
genre_facet |
Antarc* Antarctica Axel Heiberg Island Canada Glacier glacier* McMurdo Dry Valleys Nunavut Polar Biology |
op_source |
Polar Biology vol. 27 no. 2, pp. 66-74 |
op_relation |
https://ir.library.carleton.ca/pub/25888 doi:10.1007/s00300-003-0580-2 |
op_doi |
https://doi.org/10.1007/s00300-003-0580-2 |
container_title |
Polar Biology |
container_volume |
27 |
container_issue |
2 |
container_start_page |
66 |
op_container_end_page |
74 |
_version_ |
1766161884450390016 |