Diatom assemblages in surface sediments of the Ross Sea: relationship to present oceanographic conditions
Fifty four surface sediment samples from the western and central Ross Sea were examined to determine relationships between modern oceanographic conditions and surface sediment diatom assemblages. A centered R mode principal components analysis demonstrates four geographically distinct assemblages. T...
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Language: | English |
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Cambridge University Press (CUP)
1998
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Online Access: | http://dx.doi.org/10.1017/s0954102098000182 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102098000182 |
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crcambridgeupr:10.1017/s0954102098000182 2024-09-15T17:42:45+00:00 Diatom assemblages in surface sediments of the Ross Sea: relationship to present oceanographic conditions Cunningham, Wendy L. Leventer, Amy 1998 http://dx.doi.org/10.1017/s0954102098000182 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102098000182 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 10, issue 2, page 134-146 ISSN 0954-1020 1365-2079 journal-article 1998 crcambridgeupr https://doi.org/10.1017/s0954102098000182 2024-07-24T04:03:56Z Fifty four surface sediment samples from the western and central Ross Sea were examined to determine relationships between modern oceanographic conditions and surface sediment diatom assemblages. A centered R mode principal components analysis demonstrates four geographically distinct assemblages. The assemblage just north of the Ross Ice Shelf in the central Ross Sea is most closely associated with Stephanopyxis spp. (a heavily silicified diatom abundant during the Pliocene), and may result from a combination of winnowing/reworking, and modern flux of primarily non-siliceous algae. The algal assemblage in the western part of the central Ross Sea is most closely associated with Thalassiosira gracilis (an open water diatom), and reflects early seasonal pack ice break up during the late spring inception of the Ross Sea polynya. The algal assemblage north of Drygalski Ice Tongue, in the western Ross Sea, is most closely associated with Fragilariopsis curta (a diatom common in stratified ice edge zones), suggesting that water column seeding by species melting out of coastal sea ice is important in this area. The assemblage south of Drygalski Ice Tongue is most closely associated with resting spores of Thalassiosira antarctica (a diatom associated with coastal waters). Although the habitat of T. antarctica requires future research, we speculate that sea ice conditions unique to area B support an autumnal T. antarctica bloom. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Ice Shelf Ross Ice Shelf Ross Sea Sea ice Cambridge University Press Antarctic Science 10 2 134 146 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Fifty four surface sediment samples from the western and central Ross Sea were examined to determine relationships between modern oceanographic conditions and surface sediment diatom assemblages. A centered R mode principal components analysis demonstrates four geographically distinct assemblages. The assemblage just north of the Ross Ice Shelf in the central Ross Sea is most closely associated with Stephanopyxis spp. (a heavily silicified diatom abundant during the Pliocene), and may result from a combination of winnowing/reworking, and modern flux of primarily non-siliceous algae. The algal assemblage in the western part of the central Ross Sea is most closely associated with Thalassiosira gracilis (an open water diatom), and reflects early seasonal pack ice break up during the late spring inception of the Ross Sea polynya. The algal assemblage north of Drygalski Ice Tongue, in the western Ross Sea, is most closely associated with Fragilariopsis curta (a diatom common in stratified ice edge zones), suggesting that water column seeding by species melting out of coastal sea ice is important in this area. The assemblage south of Drygalski Ice Tongue is most closely associated with resting spores of Thalassiosira antarctica (a diatom associated with coastal waters). Although the habitat of T. antarctica requires future research, we speculate that sea ice conditions unique to area B support an autumnal T. antarctica bloom. |
format |
Article in Journal/Newspaper |
author |
Cunningham, Wendy L. Leventer, Amy |
spellingShingle |
Cunningham, Wendy L. Leventer, Amy Diatom assemblages in surface sediments of the Ross Sea: relationship to present oceanographic conditions |
author_facet |
Cunningham, Wendy L. Leventer, Amy |
author_sort |
Cunningham, Wendy L. |
title |
Diatom assemblages in surface sediments of the Ross Sea: relationship to present oceanographic conditions |
title_short |
Diatom assemblages in surface sediments of the Ross Sea: relationship to present oceanographic conditions |
title_full |
Diatom assemblages in surface sediments of the Ross Sea: relationship to present oceanographic conditions |
title_fullStr |
Diatom assemblages in surface sediments of the Ross Sea: relationship to present oceanographic conditions |
title_full_unstemmed |
Diatom assemblages in surface sediments of the Ross Sea: relationship to present oceanographic conditions |
title_sort |
diatom assemblages in surface sediments of the ross sea: relationship to present oceanographic conditions |
publisher |
Cambridge University Press (CUP) |
publishDate |
1998 |
url |
http://dx.doi.org/10.1017/s0954102098000182 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102098000182 |
genre |
Antarc* Antarctic Science Antarctica Ice Shelf Ross Ice Shelf Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Science Antarctica Ice Shelf Ross Ice Shelf Ross Sea Sea ice |
op_source |
Antarctic Science volume 10, issue 2, page 134-146 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102098000182 |
container_title |
Antarctic Science |
container_volume |
10 |
container_issue |
2 |
container_start_page |
134 |
op_container_end_page |
146 |
_version_ |
1810489495919788032 |