Photosynthetic Organisms in Subarctic Lake Ice
While sampling No-name lake, which is located in the Tanana Valley, Alaska, at 63°48'N., 144°35'W., we observed numerous bubbles containing mixed populations of photosynthetic bacteria and algae. Most of the material consisted of purple, pink and green colonies of bacteria. Few algae were...
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1970
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/66225 2023-05-15T14:18:49+02:00 Photosynthetic Organisms in Subarctic Lake Ice Barsdate, Robert J. Alexander, Vera 1970-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66225 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66225/50138 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66225 ARCTIC; Vol. 23 No. 3 (1970): September; 201 1923-1245 0004-0843 Chlamydomonas info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1970 ftunivcalgaryojs 2022-03-22T21:23:07Z While sampling No-name lake, which is located in the Tanana Valley, Alaska, at 63°48'N., 144°35'W., we observed numerous bubbles containing mixed populations of photosynthetic bacteria and algae. Most of the material consisted of purple, pink and green colonies of bacteria. Few algae were present, and those were primarily life-cycle stages of Chlamydomonas, but the population was dominated by photosynthetic bacteria. This occurrence of large numbers of organisms in complex populations differs substantially from previous reports of organisms in lake ice. The ice environment was somewhat unusual in that numerous overflows had occurred during the winter. In these circumstances the rate of accretion at the bottom of the ice sheet is much reduced, temperatures remain close to the freezing point and free water can occur within the ice. The water below the ice was anoxic and this, in combination with the favourable physical factors and presence of bubbles, may have been responsible for the unusual occurrence of organisms in the lake ice. Article in Journal/Newspaper Arctic Ice Sheet Subarctic Alaska University of Calgary Journal Hosting ARCTIC 23 3 |
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Open Polar |
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University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
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English |
topic |
Chlamydomonas |
spellingShingle |
Chlamydomonas Barsdate, Robert J. Alexander, Vera Photosynthetic Organisms in Subarctic Lake Ice |
topic_facet |
Chlamydomonas |
description |
While sampling No-name lake, which is located in the Tanana Valley, Alaska, at 63°48'N., 144°35'W., we observed numerous bubbles containing mixed populations of photosynthetic bacteria and algae. Most of the material consisted of purple, pink and green colonies of bacteria. Few algae were present, and those were primarily life-cycle stages of Chlamydomonas, but the population was dominated by photosynthetic bacteria. This occurrence of large numbers of organisms in complex populations differs substantially from previous reports of organisms in lake ice. The ice environment was somewhat unusual in that numerous overflows had occurred during the winter. In these circumstances the rate of accretion at the bottom of the ice sheet is much reduced, temperatures remain close to the freezing point and free water can occur within the ice. The water below the ice was anoxic and this, in combination with the favourable physical factors and presence of bubbles, may have been responsible for the unusual occurrence of organisms in the lake ice. |
format |
Article in Journal/Newspaper |
author |
Barsdate, Robert J. Alexander, Vera |
author_facet |
Barsdate, Robert J. Alexander, Vera |
author_sort |
Barsdate, Robert J. |
title |
Photosynthetic Organisms in Subarctic Lake Ice |
title_short |
Photosynthetic Organisms in Subarctic Lake Ice |
title_full |
Photosynthetic Organisms in Subarctic Lake Ice |
title_fullStr |
Photosynthetic Organisms in Subarctic Lake Ice |
title_full_unstemmed |
Photosynthetic Organisms in Subarctic Lake Ice |
title_sort |
photosynthetic organisms in subarctic lake ice |
publisher |
The Arctic Institute of North America |
publishDate |
1970 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66225 |
genre |
Arctic Ice Sheet Subarctic Alaska |
genre_facet |
Arctic Ice Sheet Subarctic Alaska |
op_source |
ARCTIC; Vol. 23 No. 3 (1970): September; 201 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66225/50138 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66225 |
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ARCTIC |
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