Summer microplankton community structure across the Scotia Sea: implications for biological carbon export
During the austral summer of 2008, we carried out a high resolution survey of the microplankton communities along a south to north transect covering a range of environments across the Scotia Sea, Southern Ocean; high and low productivity, sea-ice to open water conditions, and over a number of oceano...
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ftdoajarticles:oai:doaj.org/article:f509ff5985ec4bdb8609115bbe5bad61 2023-05-15T14:03:35+02:00 Summer microplankton community structure across the Scotia Sea: implications for biological carbon export R. E. Korb M. J. Whitehouse M. Gordon P. Ward A. J. Poulton 2010-01-01T00:00:00Z https://doi.org/10.5194/bg-7-343-2010 https://doaj.org/article/f509ff5985ec4bdb8609115bbe5bad61 EN eng Copernicus Publications http://www.biogeosciences.net/7/343/2010/bg-7-343-2010.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-7-343-2010 https://doaj.org/article/f509ff5985ec4bdb8609115bbe5bad61 Biogeosciences, Vol 7, Iss 1, Pp 343-356 (2010) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2010 ftdoajarticles https://doi.org/10.5194/bg-7-343-2010 2022-12-31T00:52:20Z During the austral summer of 2008, we carried out a high resolution survey of the microplankton communities along a south to north transect covering a range of environments across the Scotia Sea, Southern Ocean; high and low productivity, sea-ice to open water conditions, and over a number of oceanographic fronts and bathymetric features. Cluster analysis revealed five distinct communities that were geographically constrained by physical features of bathymetry and fronts. From south to north the communities were: (1) the South Orkney group, a mixed community of naked dinoflagellates and heavily silicified diatoms, (2) southern Scotia Sea, a mixed community of cyptophytes and naked dinoflagellates, (3) central Scotia Sea, dominated by naked dinoflagellates, (4) southwest of the island of South Georgia, lightly silicified diatoms and naked dinoflagellates (5) northwest of South Georgia, dominated by diatoms. Data from a previous summer cruise (2003) to the Scotia Sea followed a similar pattern of community distribution. MODIS images, Chlorophyll a and macronutrient deficits revealed dense phytoplankton blooms occurred around the island of South Georgia, were absent near the ice edge and in the central Scotia Sea and were moderate in the southern Scotia Sea. Using these environmental factors, together with community composition, we propose that south of the Southern Antarctic Circumpolar Current Front, biogenic silica is preferentially exported and north of the front, in the vicinity of South Georgia, carbon is exported to depth. Article in Journal/Newspaper Antarc* Antarctic Scotia Sea Sea ice Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean Austral Scotia Sea Biogeosciences 7 1 343 356 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 R. E. Korb M. J. Whitehouse M. Gordon P. Ward A. J. Poulton Summer microplankton community structure across the Scotia Sea: implications for biological carbon export |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
During the austral summer of 2008, we carried out a high resolution survey of the microplankton communities along a south to north transect covering a range of environments across the Scotia Sea, Southern Ocean; high and low productivity, sea-ice to open water conditions, and over a number of oceanographic fronts and bathymetric features. Cluster analysis revealed five distinct communities that were geographically constrained by physical features of bathymetry and fronts. From south to north the communities were: (1) the South Orkney group, a mixed community of naked dinoflagellates and heavily silicified diatoms, (2) southern Scotia Sea, a mixed community of cyptophytes and naked dinoflagellates, (3) central Scotia Sea, dominated by naked dinoflagellates, (4) southwest of the island of South Georgia, lightly silicified diatoms and naked dinoflagellates (5) northwest of South Georgia, dominated by diatoms. Data from a previous summer cruise (2003) to the Scotia Sea followed a similar pattern of community distribution. MODIS images, Chlorophyll a and macronutrient deficits revealed dense phytoplankton blooms occurred around the island of South Georgia, were absent near the ice edge and in the central Scotia Sea and were moderate in the southern Scotia Sea. Using these environmental factors, together with community composition, we propose that south of the Southern Antarctic Circumpolar Current Front, biogenic silica is preferentially exported and north of the front, in the vicinity of South Georgia, carbon is exported to depth. |
format |
Article in Journal/Newspaper |
author |
R. E. Korb M. J. Whitehouse M. Gordon P. Ward A. J. Poulton |
author_facet |
R. E. Korb M. J. Whitehouse M. Gordon P. Ward A. J. Poulton |
author_sort |
R. E. Korb |
title |
Summer microplankton community structure across the Scotia Sea: implications for biological carbon export |
title_short |
Summer microplankton community structure across the Scotia Sea: implications for biological carbon export |
title_full |
Summer microplankton community structure across the Scotia Sea: implications for biological carbon export |
title_fullStr |
Summer microplankton community structure across the Scotia Sea: implications for biological carbon export |
title_full_unstemmed |
Summer microplankton community structure across the Scotia Sea: implications for biological carbon export |
title_sort |
summer microplankton community structure across the scotia sea: implications for biological carbon export |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/bg-7-343-2010 https://doaj.org/article/f509ff5985ec4bdb8609115bbe5bad61 |
geographic |
Antarctic Southern Ocean Austral Scotia Sea |
geographic_facet |
Antarctic Southern Ocean Austral Scotia Sea |
genre |
Antarc* Antarctic Scotia Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Scotia Sea Sea ice Southern Ocean |
op_source |
Biogeosciences, Vol 7, Iss 1, Pp 343-356 (2010) |
op_relation |
http://www.biogeosciences.net/7/343/2010/bg-7-343-2010.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 doi:10.5194/bg-7-343-2010 https://doaj.org/article/f509ff5985ec4bdb8609115bbe5bad61 |
op_doi |
https://doi.org/10.5194/bg-7-343-2010 |
container_title |
Biogeosciences |
container_volume |
7 |
container_issue |
1 |
container_start_page |
343 |
op_container_end_page |
356 |
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1766274271301074944 |