Interannual Variations In Nutrients, Net Community Production, and Biogeochemical Cycles In the Ross Sea
The Ross Sea continental shelf is dominated by the seasonal appearance of a large phytoplankton bloom. This bloom is regularly dominated by diatoms and the haptophyte Phaeocystis antarctica, and significant nutrient (nitrogen and silicon) reductions within the water column occur during the growing s...
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2006
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ftsouthmissispun:oai:aquila.usm.edu:fac_pubs-3519 2023-07-30T03:59:14+02:00 Interannual Variations In Nutrients, Net Community Production, and Biogeochemical Cycles In the Ross Sea Smith, Walker O., Jr. Shields, Amy R. Peloquin, Jill A. Catalano, Giulio Tozzi, Sasha Dinniman, Michael S. Asper, Vernon A. 2006-01-01T08:00:00Z https://aquila.usm.edu/fac_pubs/2520 http://logon.lynx.lib.usm.edu/login?url=http://ac.els-cdn.com/S0967064506000695/1-s2.0-S0967064506000695-main.pdf?_tid=66a37b20-c312-11e2-af06-00000aab0f01&acdnat=1369249637_293c7c759553ee4702e522d3d00f1f36 unknown The Aquila Digital Community https://aquila.usm.edu/fac_pubs/2520 http://logon.lynx.lib.usm.edu/login?url=http://ac.els-cdn.com/S0967064506000695/1-s2.0-S0967064506000695-main.pdf?_tid=66a37b20-c312-11e2-af06-00000aab0f01&acdnat=1369249637_293c7c759553ee4702e522d3d00f1f36 Faculty Publications Ross Sea nutrients phaeocystis fluorescence nitrogen silica production Life Sciences Marine Biology text 2006 ftsouthmissispun 2023-07-15T18:43:13Z The Ross Sea continental shelf is dominated by the seasonal appearance of a large phytoplankton bloom. This bloom is regularly dominated by diatoms and the haptophyte Phaeocystis antarctica, and significant nutrient (nitrogen and silicon) reductions within the water column occur during the growing season (early November to late February). Diatoms mediate silicic acid removal, whereas both taxa remove nitrate. Dissolved and particulate nitrogen and silica concentrations were collected from a series of cruises to the southern Ross Sea over 3 years. Simple, one-dimensional nutrient budgets were generated for nitrogen and silica, and estimates of vertical flux were derived from these budgets. Substantial variations among years are observed to occur in seasonal community production, assemblage composition, Si:N uptake ratios, and export, and standard deviations are equal to similar to 30% of the mean. During 2003-2004 a large Phaeocystis antarctica bloom occurred in December, and was followed by a bloom of diatoms. This secondary bloom was equal in magnitude to that of the initial P. antarctica bloom. In contrast, no secondary bloom was observed in 2001-2002. Continuous fluorescence measurements suggested that the spatial-temporal mosaic of phytoplankton dynamics in the Ross Sea is far more complex than previously thought. We hypothesize that variations occur between years not only in terms of both magnitude and composition of the bloom, but also in the controlling mechanisms. (c) 2006 Elsevier Ltd. All rights reserved. Text Antarc* Antarctica Ross Sea The University of Southern Mississippi: The Aquila Digital Community Ross Sea |
institution |
Open Polar |
collection |
The University of Southern Mississippi: The Aquila Digital Community |
op_collection_id |
ftsouthmissispun |
language |
unknown |
topic |
Ross Sea nutrients phaeocystis fluorescence nitrogen silica production Life Sciences Marine Biology |
spellingShingle |
Ross Sea nutrients phaeocystis fluorescence nitrogen silica production Life Sciences Marine Biology Smith, Walker O., Jr. Shields, Amy R. Peloquin, Jill A. Catalano, Giulio Tozzi, Sasha Dinniman, Michael S. Asper, Vernon A. Interannual Variations In Nutrients, Net Community Production, and Biogeochemical Cycles In the Ross Sea |
topic_facet |
Ross Sea nutrients phaeocystis fluorescence nitrogen silica production Life Sciences Marine Biology |
description |
The Ross Sea continental shelf is dominated by the seasonal appearance of a large phytoplankton bloom. This bloom is regularly dominated by diatoms and the haptophyte Phaeocystis antarctica, and significant nutrient (nitrogen and silicon) reductions within the water column occur during the growing season (early November to late February). Diatoms mediate silicic acid removal, whereas both taxa remove nitrate. Dissolved and particulate nitrogen and silica concentrations were collected from a series of cruises to the southern Ross Sea over 3 years. Simple, one-dimensional nutrient budgets were generated for nitrogen and silica, and estimates of vertical flux were derived from these budgets. Substantial variations among years are observed to occur in seasonal community production, assemblage composition, Si:N uptake ratios, and export, and standard deviations are equal to similar to 30% of the mean. During 2003-2004 a large Phaeocystis antarctica bloom occurred in December, and was followed by a bloom of diatoms. This secondary bloom was equal in magnitude to that of the initial P. antarctica bloom. In contrast, no secondary bloom was observed in 2001-2002. Continuous fluorescence measurements suggested that the spatial-temporal mosaic of phytoplankton dynamics in the Ross Sea is far more complex than previously thought. We hypothesize that variations occur between years not only in terms of both magnitude and composition of the bloom, but also in the controlling mechanisms. (c) 2006 Elsevier Ltd. All rights reserved. |
format |
Text |
author |
Smith, Walker O., Jr. Shields, Amy R. Peloquin, Jill A. Catalano, Giulio Tozzi, Sasha Dinniman, Michael S. Asper, Vernon A. |
author_facet |
Smith, Walker O., Jr. Shields, Amy R. Peloquin, Jill A. Catalano, Giulio Tozzi, Sasha Dinniman, Michael S. Asper, Vernon A. |
author_sort |
Smith, Walker O., Jr. |
title |
Interannual Variations In Nutrients, Net Community Production, and Biogeochemical Cycles In the Ross Sea |
title_short |
Interannual Variations In Nutrients, Net Community Production, and Biogeochemical Cycles In the Ross Sea |
title_full |
Interannual Variations In Nutrients, Net Community Production, and Biogeochemical Cycles In the Ross Sea |
title_fullStr |
Interannual Variations In Nutrients, Net Community Production, and Biogeochemical Cycles In the Ross Sea |
title_full_unstemmed |
Interannual Variations In Nutrients, Net Community Production, and Biogeochemical Cycles In the Ross Sea |
title_sort |
interannual variations in nutrients, net community production, and biogeochemical cycles in the ross sea |
publisher |
The Aquila Digital Community |
publishDate |
2006 |
url |
https://aquila.usm.edu/fac_pubs/2520 http://logon.lynx.lib.usm.edu/login?url=http://ac.els-cdn.com/S0967064506000695/1-s2.0-S0967064506000695-main.pdf?_tid=66a37b20-c312-11e2-af06-00000aab0f01&acdnat=1369249637_293c7c759553ee4702e522d3d00f1f36 |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Antarc* Antarctica Ross Sea |
genre_facet |
Antarc* Antarctica Ross Sea |
op_source |
Faculty Publications |
op_relation |
https://aquila.usm.edu/fac_pubs/2520 http://logon.lynx.lib.usm.edu/login?url=http://ac.els-cdn.com/S0967064506000695/1-s2.0-S0967064506000695-main.pdf?_tid=66a37b20-c312-11e2-af06-00000aab0f01&acdnat=1369249637_293c7c759553ee4702e522d3d00f1f36 |
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