Photosynthetic nature of ice-algae under fast ice near Syowa Station, Antarctica
The photosynthetic nature of the ice-associated microalgal assemblages (ice-algae) was investigated in the annual sea ice area near Syowa Station (69°00′S, 39°35′E), Antarctica. The maximum photosynthetic rate of 1.23mgO_2/mg chl. α/h was obtained under the light intensity of 25μE/m^2/s. In a higher...
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Tokyo University of Fisheries
1986
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ftnipr:oai:nipr.repo.nii.ac.jp:00002030 2023-05-15T13:47:59+02:00 Photosynthetic nature of ice-algae under fast ice near Syowa Station, Antarctica Hiroo Satoh Kentaro Watanabe 1986-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2030 http://id.nii.ac.jp/1291/00002030/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2030&item_no=1&attribute_id=18&file_no=1 en eng Tokyo University of Fisheries National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2030 http://id.nii.ac.jp/1291/00002030/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 44, 34-42(1986-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2030&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1986 ftnipr 2022-11-12T19:42:52Z The photosynthetic nature of the ice-associated microalgal assemblages (ice-algae) was investigated in the annual sea ice area near Syowa Station (69°00′S, 39°35′E), Antarctica. The maximum photosynthetic rate of 1.23mgO_2/mg chl. α/h was obtained under the light intensity of 25μE/m^2/s. In a higher light condition above 80μE/m^2/s, a depression of the rate caused by photo-inhibition was observed. These results demonstrated the low-light-adaptation of Antarctic ice-algae under the exceedingly low light conditions. The light condition under the ice was largely controlled by the thickness of snow covering the fast ice as well as by the variation of solar radiation. The optimum temperature for photosynthesis of the ice-algae was about 8℃, while the rates of photosynthesis reduced at higher temperatures. In the present area, an average specific growth rate (μ) of the ice-algae was 0.25 div./day. Report Antarc* Antarctic Antarctica E. Antarctica ice algae Memoirs of National Institute of Polar Research Polar Research Sea ice National Institute of Polar Research Repository, Japan Antarctic Syowa Station |
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Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
The photosynthetic nature of the ice-associated microalgal assemblages (ice-algae) was investigated in the annual sea ice area near Syowa Station (69°00′S, 39°35′E), Antarctica. The maximum photosynthetic rate of 1.23mgO_2/mg chl. α/h was obtained under the light intensity of 25μE/m^2/s. In a higher light condition above 80μE/m^2/s, a depression of the rate caused by photo-inhibition was observed. These results demonstrated the low-light-adaptation of Antarctic ice-algae under the exceedingly low light conditions. The light condition under the ice was largely controlled by the thickness of snow covering the fast ice as well as by the variation of solar radiation. The optimum temperature for photosynthesis of the ice-algae was about 8℃, while the rates of photosynthesis reduced at higher temperatures. In the present area, an average specific growth rate (μ) of the ice-algae was 0.25 div./day. |
format |
Report |
author |
Hiroo Satoh Kentaro Watanabe |
spellingShingle |
Hiroo Satoh Kentaro Watanabe Photosynthetic nature of ice-algae under fast ice near Syowa Station, Antarctica |
author_facet |
Hiroo Satoh Kentaro Watanabe |
author_sort |
Hiroo Satoh |
title |
Photosynthetic nature of ice-algae under fast ice near Syowa Station, Antarctica |
title_short |
Photosynthetic nature of ice-algae under fast ice near Syowa Station, Antarctica |
title_full |
Photosynthetic nature of ice-algae under fast ice near Syowa Station, Antarctica |
title_fullStr |
Photosynthetic nature of ice-algae under fast ice near Syowa Station, Antarctica |
title_full_unstemmed |
Photosynthetic nature of ice-algae under fast ice near Syowa Station, Antarctica |
title_sort |
photosynthetic nature of ice-algae under fast ice near syowa station, antarctica |
publisher |
Tokyo University of Fisheries |
publishDate |
1986 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2030 http://id.nii.ac.jp/1291/00002030/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2030&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic Syowa Station |
geographic_facet |
Antarctic Syowa Station |
genre |
Antarc* Antarctic Antarctica E. Antarctica ice algae Memoirs of National Institute of Polar Research Polar Research Sea ice |
genre_facet |
Antarc* Antarctic Antarctica E. Antarctica ice algae Memoirs of National Institute of Polar Research Polar Research Sea ice |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2030 http://id.nii.ac.jp/1291/00002030/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 44, 34-42(1986-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2030&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248338000183296 |