ABUNDANCE AND BIOMASS DISTRIBUTION OF MICROBIAL ASSEMBLAGES AT THE SURFACE IN THE OCEANIC PROVINCE OF ANTARCTIC OCEAN (14th Symposium on Polar Biology)
During the JARE-32 (the 32nd Japanese Antarctic Research Expedition) cruise, bacterioplankton, autotrophic and heterotrophic nanoplankton (2-20 μm in length), and microzooplankton (15-250 μm in length) were collected from the surface of the Indian and Australian sectors of Antarctic Ocean. The avera...
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ftnipr:oai:nipr.repo.nii.ac.jp:00005180 2023-05-15T13:49:03+02:00 ABUNDANCE AND BIOMASS DISTRIBUTION OF MICROBIAL ASSEMBLAGES AT THE SURFACE IN THE OCEANIC PROVINCE OF ANTARCTIC OCEAN (14th Symposium on Polar Biology) イシヤマ ミチエ ヒロミ ジュウロウ タニムラ アツシ カドタ サダミ Michie ISHIYAMA Juro HIROMI Atsushi TANIMURA Sadami KADOTA 1993-01 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5180 http://id.nii.ac.jp/1291/00005180/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5180&item_no=1&attribute_id=18&file_no=1 en eng Proceeding Laboratory of Fisheries Oceanography, College of Agriculture and Veterinary Medicine, Nihon University National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5180 http://id.nii.ac.jp/1291/00005180/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 6, 6-20(1993-01) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5180&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1993 ftnipr 2023-02-11T20:10:49Z During the JARE-32 (the 32nd Japanese Antarctic Research Expedition) cruise, bacterioplankton, autotrophic and heterotrophic nanoplankton (2-20 μm in length), and microzooplankton (15-250 μm in length) were collected from the surface of the Indian and Australian sectors of Antarctic Ocean. The average abundance of bacterioplankton was 4.56×10^4 cells/ml, and the biomass was 0.25 mg C/m^3. The values of the autotrophic nanoplankton were 0.5×10^3 cells/ml and 2.27 mg C/m^3, respectively. There were 1.02×10^2 cells/ml of heterotrophic nanoplankton in abundance, and its biomass was 0.71 mg C/m^3. About 30% of the biomass of this assemblage was choanoflagellates. Average abundance and biomass of the microzooplankton were 1.62×10^3 inds./l and 3.78 mg C/m^3, respectively. A large portion of the abundance and biomass of microzooplankton was oligotrichs. Protozoans within micro-sized (15-250 μm) category which ingest preys similar to or larger than themselves were found where biomass ratio of nanoplankton to microzooplankton was low (<0.3). This may indicate adaptability of the protozoan to a severe food environment. The biomass (log-scale) decreased linearly with increasing individual body weight (log-scale) with a slope of -0.21. This result suggests that smaller protozoans such as heterotrophic nanoplankton and oligotrichs have an important role in the Antarctic Ocean's energy flow. Report Antarc* Antarctic Antarctic Ocean Polar Biology Proceedings of the NIPR Symposium on Polar Biology National Institute of Polar Research Repository, Japan Antarctic The Antarctic Indian Antarctic Ocean |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
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English |
description |
During the JARE-32 (the 32nd Japanese Antarctic Research Expedition) cruise, bacterioplankton, autotrophic and heterotrophic nanoplankton (2-20 μm in length), and microzooplankton (15-250 μm in length) were collected from the surface of the Indian and Australian sectors of Antarctic Ocean. The average abundance of bacterioplankton was 4.56×10^4 cells/ml, and the biomass was 0.25 mg C/m^3. The values of the autotrophic nanoplankton were 0.5×10^3 cells/ml and 2.27 mg C/m^3, respectively. There were 1.02×10^2 cells/ml of heterotrophic nanoplankton in abundance, and its biomass was 0.71 mg C/m^3. About 30% of the biomass of this assemblage was choanoflagellates. Average abundance and biomass of the microzooplankton were 1.62×10^3 inds./l and 3.78 mg C/m^3, respectively. A large portion of the abundance and biomass of microzooplankton was oligotrichs. Protozoans within micro-sized (15-250 μm) category which ingest preys similar to or larger than themselves were found where biomass ratio of nanoplankton to microzooplankton was low (<0.3). This may indicate adaptability of the protozoan to a severe food environment. The biomass (log-scale) decreased linearly with increasing individual body weight (log-scale) with a slope of -0.21. This result suggests that smaller protozoans such as heterotrophic nanoplankton and oligotrichs have an important role in the Antarctic Ocean's energy flow. |
format |
Report |
author |
イシヤマ ミチエ ヒロミ ジュウロウ タニムラ アツシ カドタ サダミ Michie ISHIYAMA Juro HIROMI Atsushi TANIMURA Sadami KADOTA |
spellingShingle |
イシヤマ ミチエ ヒロミ ジュウロウ タニムラ アツシ カドタ サダミ Michie ISHIYAMA Juro HIROMI Atsushi TANIMURA Sadami KADOTA ABUNDANCE AND BIOMASS DISTRIBUTION OF MICROBIAL ASSEMBLAGES AT THE SURFACE IN THE OCEANIC PROVINCE OF ANTARCTIC OCEAN (14th Symposium on Polar Biology) |
author_facet |
イシヤマ ミチエ ヒロミ ジュウロウ タニムラ アツシ カドタ サダミ Michie ISHIYAMA Juro HIROMI Atsushi TANIMURA Sadami KADOTA |
author_sort |
イシヤマ ミチエ |
title |
ABUNDANCE AND BIOMASS DISTRIBUTION OF MICROBIAL ASSEMBLAGES AT THE SURFACE IN THE OCEANIC PROVINCE OF ANTARCTIC OCEAN (14th Symposium on Polar Biology) |
title_short |
ABUNDANCE AND BIOMASS DISTRIBUTION OF MICROBIAL ASSEMBLAGES AT THE SURFACE IN THE OCEANIC PROVINCE OF ANTARCTIC OCEAN (14th Symposium on Polar Biology) |
title_full |
ABUNDANCE AND BIOMASS DISTRIBUTION OF MICROBIAL ASSEMBLAGES AT THE SURFACE IN THE OCEANIC PROVINCE OF ANTARCTIC OCEAN (14th Symposium on Polar Biology) |
title_fullStr |
ABUNDANCE AND BIOMASS DISTRIBUTION OF MICROBIAL ASSEMBLAGES AT THE SURFACE IN THE OCEANIC PROVINCE OF ANTARCTIC OCEAN (14th Symposium on Polar Biology) |
title_full_unstemmed |
ABUNDANCE AND BIOMASS DISTRIBUTION OF MICROBIAL ASSEMBLAGES AT THE SURFACE IN THE OCEANIC PROVINCE OF ANTARCTIC OCEAN (14th Symposium on Polar Biology) |
title_sort |
abundance and biomass distribution of microbial assemblages at the surface in the oceanic province of antarctic ocean (14th symposium on polar biology) |
publisher |
Proceeding |
publishDate |
1993 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5180 http://id.nii.ac.jp/1291/00005180/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5180&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic The Antarctic Indian Antarctic Ocean |
geographic_facet |
Antarctic The Antarctic Indian Antarctic Ocean |
genre |
Antarc* Antarctic Antarctic Ocean Polar Biology Proceedings of the NIPR Symposium on Polar Biology |
genre_facet |
Antarc* Antarctic Antarctic Ocean Polar Biology Proceedings of the NIPR Symposium on Polar Biology |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5180 http://id.nii.ac.jp/1291/00005180/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 6, 6-20(1993-01) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5180&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766250670275428352 |