Photosynthetic nature of ice algae and their contribution to the primary production in lagoon Saroma Ko, Hokkaido, Japan
Photosynthetic activity of ice algae and phytoplankton was investigated under sea ice at two stations (ca. 44°10'N, 143°46'E) in lagoon Saroma Ko, Hokkaido, Japan, in early March 1987. Water temperature and salinity ranged from -1.1 to -1.4℃ and from 32.4 to 33.5, respectively. The maximum...
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Tokyo University of Fisheries/Laboratory of Biology, College of Liberal Arts, Saitama University/National Institute of Polar Research/National Institute of Polar Research/National Institute of Polar Research/Tokyo University of Fisheries
1989
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ftnipr:oai:nipr.repo.nii.ac.jp:00005043 2023-05-15T16:36:32+02:00 Photosynthetic nature of ice algae and their contribution to the primary production in lagoon Saroma Ko, Hokkaido, Japan Hiroo Satoh Yukuya Yamaguchi Kentaro Watanabe Atsushi Tanimura Mitsuo Fukuchi Yusho Aruga 1989-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5043 http://id.nii.ac.jp/1291/00005043/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5043&item_no=1&attribute_id=18&file_no=1 en eng Tokyo University of Fisheries/Laboratory of Biology, College of Liberal Arts, Saitama University/National Institute of Polar Research/National Institute of Polar Research/National Institute of Polar Research/Tokyo University of Fisheries National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5043 http://id.nii.ac.jp/1291/00005043/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 2, 1-8(1989-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5043&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1989 ftnipr 2023-02-11T20:10:44Z Photosynthetic activity of ice algae and phytoplankton was investigated under sea ice at two stations (ca. 44°10'N, 143°46'E) in lagoon Saroma Ko, Hokkaido, Japan, in early March 1987. Water temperature and salinity ranged from -1.1 to -1.4℃ and from 32.4 to 33.5, respectively. The maximum chlorophyll a concentrations of ice algae within 4cm from the bottom of sea ice and phytoplankton in water column were 385 and 0.77 mg m^<-3>, respectively. The maximum photosynthetic rate (1.12 mgO_2 mgchl, a^<-1> h^<-1>) of ice algae was obtained under 37.5 μEm^2 s^<-1>, which corresponds to only 3% of incident solar radiation. These results demonstrate the low-light adaptation of ice algae grown under low light conditions. The optimum temperature for photosynthesis of ice algae was around 8℃. In situ measurements on a clear day gave the primary production of 1.59 mgCm^<-2> h^<-1> by ice algae and that of 1.92 mgCm^<-2> h^<-1> by phytoplankton. It was concluded that the ice algae contribute to a considerable extent to the production of organic carbon in the ice-covered area of Saroma Ko during winter. Report ice algae Polar Biology Proceedings of the NIPR Symposium on Polar Biology Sea ice National Institute of Polar Research Repository, Japan |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Photosynthetic activity of ice algae and phytoplankton was investigated under sea ice at two stations (ca. 44°10'N, 143°46'E) in lagoon Saroma Ko, Hokkaido, Japan, in early March 1987. Water temperature and salinity ranged from -1.1 to -1.4℃ and from 32.4 to 33.5, respectively. The maximum chlorophyll a concentrations of ice algae within 4cm from the bottom of sea ice and phytoplankton in water column were 385 and 0.77 mg m^<-3>, respectively. The maximum photosynthetic rate (1.12 mgO_2 mgchl, a^<-1> h^<-1>) of ice algae was obtained under 37.5 μEm^2 s^<-1>, which corresponds to only 3% of incident solar radiation. These results demonstrate the low-light adaptation of ice algae grown under low light conditions. The optimum temperature for photosynthesis of ice algae was around 8℃. In situ measurements on a clear day gave the primary production of 1.59 mgCm^<-2> h^<-1> by ice algae and that of 1.92 mgCm^<-2> h^<-1> by phytoplankton. It was concluded that the ice algae contribute to a considerable extent to the production of organic carbon in the ice-covered area of Saroma Ko during winter. |
format |
Report |
author |
Hiroo Satoh Yukuya Yamaguchi Kentaro Watanabe Atsushi Tanimura Mitsuo Fukuchi Yusho Aruga |
spellingShingle |
Hiroo Satoh Yukuya Yamaguchi Kentaro Watanabe Atsushi Tanimura Mitsuo Fukuchi Yusho Aruga Photosynthetic nature of ice algae and their contribution to the primary production in lagoon Saroma Ko, Hokkaido, Japan |
author_facet |
Hiroo Satoh Yukuya Yamaguchi Kentaro Watanabe Atsushi Tanimura Mitsuo Fukuchi Yusho Aruga |
author_sort |
Hiroo Satoh |
title |
Photosynthetic nature of ice algae and their contribution to the primary production in lagoon Saroma Ko, Hokkaido, Japan |
title_short |
Photosynthetic nature of ice algae and their contribution to the primary production in lagoon Saroma Ko, Hokkaido, Japan |
title_full |
Photosynthetic nature of ice algae and their contribution to the primary production in lagoon Saroma Ko, Hokkaido, Japan |
title_fullStr |
Photosynthetic nature of ice algae and their contribution to the primary production in lagoon Saroma Ko, Hokkaido, Japan |
title_full_unstemmed |
Photosynthetic nature of ice algae and their contribution to the primary production in lagoon Saroma Ko, Hokkaido, Japan |
title_sort |
photosynthetic nature of ice algae and their contribution to the primary production in lagoon saroma ko, hokkaido, japan |
publisher |
Tokyo University of Fisheries/Laboratory of Biology, College of Liberal Arts, Saitama University/National Institute of Polar Research/National Institute of Polar Research/National Institute of Polar Research/Tokyo University of Fisheries |
publishDate |
1989 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5043 http://id.nii.ac.jp/1291/00005043/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5043&item_no=1&attribute_id=18&file_no=1 |
genre |
ice algae Polar Biology Proceedings of the NIPR Symposium on Polar Biology Sea ice |
genre_facet |
ice algae Polar Biology Proceedings of the NIPR Symposium on Polar Biology Sea ice |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5043 http://id.nii.ac.jp/1291/00005043/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 2, 1-8(1989-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5043&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766026863822503936 |