Variation in the diatom community under fast ice near Syowa Station, Antarctica, during the austral summer of 1997/98
Abstract: Variations in abundance and community structure of diatoms under the fast ice near Syowa Station were investigated almost daily during the austral summer of 1997/98. Two periods of high chlorophyll a concentration were observed through-out the study: from the end of December to early Janua...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.516.5362 2023-05-15T13:56:07+02:00 Variation in the diatom community under fast ice near Syowa Station, Antarctica, during the austral summer of 1997/98 Akira Lshikawal Naoki Washiyama Atsushi Tanimura Mitsuo Fukuchi The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.5362 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/2001-Ishikawa.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.5362 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/2001-Ishikawa.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/2001-Ishikawa.pdf text ftciteseerx 2016-01-08T09:53:52Z Abstract: Variations in abundance and community structure of diatoms under the fast ice near Syowa Station were investigated almost daily during the austral summer of 1997/98. Two periods of high chlorophyll a concentration were observed through-out the study: from the end of December to early January and from the middle to the end of January. Size fractionation of chlorophyll a revealed that phytoplankton during the former period consisted mostly of organisms larger than 20,um and during the latter period, 10-20,um. The large diatoms, Porosira pseudodenticulata and Pseudo-nitzschia turgiduloides, and small diatoms, Fragilariopsis spp., were the dominant organisms in the former and latter periods, respectively. Melting of the fast ice occurred in January, indicating a possibility that small sized diatoms were released from the ice to the water column. Accumulation of small diatoms in a sediment trap followed a decrease of their abundance in the water column. These results indicate that most of the ice algae detached from the ice sank directly to the bottom during the latter half of the austral summer. key words: chlorophyll a, diatom community, water column, sinking, Syowa Station Text Antarc* Antarctica ice algae Unknown Austral Syowa Station |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
Abstract: Variations in abundance and community structure of diatoms under the fast ice near Syowa Station were investigated almost daily during the austral summer of 1997/98. Two periods of high chlorophyll a concentration were observed through-out the study: from the end of December to early January and from the middle to the end of January. Size fractionation of chlorophyll a revealed that phytoplankton during the former period consisted mostly of organisms larger than 20,um and during the latter period, 10-20,um. The large diatoms, Porosira pseudodenticulata and Pseudo-nitzschia turgiduloides, and small diatoms, Fragilariopsis spp., were the dominant organisms in the former and latter periods, respectively. Melting of the fast ice occurred in January, indicating a possibility that small sized diatoms were released from the ice to the water column. Accumulation of small diatoms in a sediment trap followed a decrease of their abundance in the water column. These results indicate that most of the ice algae detached from the ice sank directly to the bottom during the latter half of the austral summer. key words: chlorophyll a, diatom community, water column, sinking, Syowa Station |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Akira Lshikawal Naoki Washiyama Atsushi Tanimura Mitsuo Fukuchi |
spellingShingle |
Akira Lshikawal Naoki Washiyama Atsushi Tanimura Mitsuo Fukuchi Variation in the diatom community under fast ice near Syowa Station, Antarctica, during the austral summer of 1997/98 |
author_facet |
Akira Lshikawal Naoki Washiyama Atsushi Tanimura Mitsuo Fukuchi |
author_sort |
Akira Lshikawal |
title |
Variation in the diatom community under fast ice near Syowa Station, Antarctica, during the austral summer of 1997/98 |
title_short |
Variation in the diatom community under fast ice near Syowa Station, Antarctica, during the austral summer of 1997/98 |
title_full |
Variation in the diatom community under fast ice near Syowa Station, Antarctica, during the austral summer of 1997/98 |
title_fullStr |
Variation in the diatom community under fast ice near Syowa Station, Antarctica, during the austral summer of 1997/98 |
title_full_unstemmed |
Variation in the diatom community under fast ice near Syowa Station, Antarctica, during the austral summer of 1997/98 |
title_sort |
variation in the diatom community under fast ice near syowa station, antarctica, during the austral summer of 1997/98 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.5362 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/2001-Ishikawa.pdf |
geographic |
Austral Syowa Station |
geographic_facet |
Austral Syowa Station |
genre |
Antarc* Antarctica ice algae |
genre_facet |
Antarc* Antarctica ice algae |
op_source |
http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/2001-Ishikawa.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.5362 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/2001-Ishikawa.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766263370962436096 |