The effects of an Arctic winter on benthic invertebrates in the littoral zone of Char Lake, Northwest Territories
A method was devised for sampling the frozen benthos in the littoral zone of Char Lake, Northwest Territories, a polar lake that was studied during the International Biological Program. Temperature probes indicated that during the winter benthic invertebrates in sediments at 0.5 and 1.75 m were expo...
Published in: | Canadian Journal of Zoology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Canadian Science Publishing
1985
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Online Access: | http://dx.doi.org/10.1139/z85-422 http://www.nrcresearchpress.com/doi/pdf/10.1139/z85-422 |
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crcansciencepubl:10.1139/z85-422 2023-12-17T10:26:11+01:00 The effects of an Arctic winter on benthic invertebrates in the littoral zone of Char Lake, Northwest Territories Andrews, Daniel Rigler, Frank H. 1985 http://dx.doi.org/10.1139/z85-422 http://www.nrcresearchpress.com/doi/pdf/10.1139/z85-422 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 63, issue 12, page 2825-2834 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1985 crcansciencepubl https://doi.org/10.1139/z85-422 2023-11-19T13:39:30Z A method was devised for sampling the frozen benthos in the littoral zone of Char Lake, Northwest Territories, a polar lake that was studied during the International Biological Program. Temperature probes indicated that during the winter benthic invertebrates in sediments at 0.5 and 1.75 m were exposed to temperatures as low as −18 and −8 °C, respectively. Mortality in animals that had overwintered in the frozen samples ranged from 13 to 84% (mean 46%) and was attributed mostly to sample processing. With the possible exception of chironomids, no conclusive evidence was found that benthic invertebrates avoid freezing by emigrating to deeper portions of the lake. Exposure to subzero temperatures for 8 months or more increased the synchrony in development of the population of the harpacticoid Attheyella nordenskioldii and shifted its peak reproductive period by about 4 months. These changes implied increases in the population's gross production, growth efficiency, and ecological efficiency. The exposure of shallow-dwelling benthic invertebrates to subzero temperatures is a widespread phenomenon, the effects of which on life cycles and population energetics are poorly known. Article in Journal/Newspaper Arctic Northwest Territories Canadian Science Publishing (via Crossref) Arctic Northwest Territories Canadian Journal of Zoology 63 12 2825 2834 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Andrews, Daniel Rigler, Frank H. The effects of an Arctic winter on benthic invertebrates in the littoral zone of Char Lake, Northwest Territories |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
A method was devised for sampling the frozen benthos in the littoral zone of Char Lake, Northwest Territories, a polar lake that was studied during the International Biological Program. Temperature probes indicated that during the winter benthic invertebrates in sediments at 0.5 and 1.75 m were exposed to temperatures as low as −18 and −8 °C, respectively. Mortality in animals that had overwintered in the frozen samples ranged from 13 to 84% (mean 46%) and was attributed mostly to sample processing. With the possible exception of chironomids, no conclusive evidence was found that benthic invertebrates avoid freezing by emigrating to deeper portions of the lake. Exposure to subzero temperatures for 8 months or more increased the synchrony in development of the population of the harpacticoid Attheyella nordenskioldii and shifted its peak reproductive period by about 4 months. These changes implied increases in the population's gross production, growth efficiency, and ecological efficiency. The exposure of shallow-dwelling benthic invertebrates to subzero temperatures is a widespread phenomenon, the effects of which on life cycles and population energetics are poorly known. |
format |
Article in Journal/Newspaper |
author |
Andrews, Daniel Rigler, Frank H. |
author_facet |
Andrews, Daniel Rigler, Frank H. |
author_sort |
Andrews, Daniel |
title |
The effects of an Arctic winter on benthic invertebrates in the littoral zone of Char Lake, Northwest Territories |
title_short |
The effects of an Arctic winter on benthic invertebrates in the littoral zone of Char Lake, Northwest Territories |
title_full |
The effects of an Arctic winter on benthic invertebrates in the littoral zone of Char Lake, Northwest Territories |
title_fullStr |
The effects of an Arctic winter on benthic invertebrates in the littoral zone of Char Lake, Northwest Territories |
title_full_unstemmed |
The effects of an Arctic winter on benthic invertebrates in the littoral zone of Char Lake, Northwest Territories |
title_sort |
effects of an arctic winter on benthic invertebrates in the littoral zone of char lake, northwest territories |
publisher |
Canadian Science Publishing |
publishDate |
1985 |
url |
http://dx.doi.org/10.1139/z85-422 http://www.nrcresearchpress.com/doi/pdf/10.1139/z85-422 |
geographic |
Arctic Northwest Territories |
geographic_facet |
Arctic Northwest Territories |
genre |
Arctic Northwest Territories |
genre_facet |
Arctic Northwest Territories |
op_source |
Canadian Journal of Zoology volume 63, issue 12, page 2825-2834 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z85-422 |
container_title |
Canadian Journal of Zoology |
container_volume |
63 |
container_issue |
12 |
container_start_page |
2825 |
op_container_end_page |
2834 |
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1785577906323324928 |