Nutrient anomalies in Fragilariopsis kerguelensis blooms, iron deficiency and the nitrate/phosphate ratio (A. C. Redfield) of the Antarctic Ocean
During seasonal development of blooms in the Polar Frontal region, concentrations of nitrate and phosphate decreased in surface waters. In blooms of Fragilariopsis kerguelensis at the southern rim (49-50 degrees S) of the Polar Frontal region the dissolved ratio NO3/PO4 increased from the winter val...
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Pergamon-elsevier science ltd
1997
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ftunivleuven:oai:lirias.kuleuven.be:123456789/47019 2023-05-15T13:58:21+02:00 Nutrient anomalies in Fragilariopsis kerguelensis blooms, iron deficiency and the nitrate/phosphate ratio (A. C. Redfield) of the Antarctic Ocean DeBaar, HJW VanLeeuwe, MA Scharek, R Goeyens, Leo Bakker, KMJ Fritsche, P 1997 https://lirias.kuleuven.be/handle/123456789/47019 http://links.isiknowledge.com/Links/LinkOut.cgi?PID=ScienceDirect&source_PID=PRODUCT_NAME&origin=WOS_RETURN_URL&type=window&dest=http%3A%2F%2Fgateway.isiknowledge.com%2Fgateway%2FGateway.cgi%3FGWVersion%3D2%26SrcAuth%3DScienceDirect%26SrcApp%3DPRODUCT_NAME%26KeyAID%3DS0967064596001026%26DestApp%3DScienceDirect%26SrcAppSID%3DAPP_SID%26SrcJTitle%3DWURS_TITLE en eng Pergamon-elsevier science ltd Deep-sea research part ii-topical studies in oceanography vol:44 issue:1-2 pages:229-& https://lirias.kuleuven.be/handle/123456789/47019 0967-0645 http://links.isiknowledge.com/Links/LinkOut.cgi?PID=ScienceDirect&source_PID=PRODUCT_NAME&origin=WOS_RETURN_URL&type=window&dest=http%3A%2F%2Fgateway.isiknowledge.com%2Fgateway%2FGateway.cgi%3FGWVersion%3D2%26SrcAuth%3DScienceDirect%26SrcApp%3DPRODUCT_NAME%26KeyAID%3DS0967064596001026%26DestApp%3DScienceDirect%26SrcAppSID%3DAPP_SID%26SrcJTitle%3DWURS_TITLE southern-ocean atmospheric co2 isopycnal surfaces use efficiencies scotia seas weddell sea phytoplankton carbon fertilization plankton Description (Metadata) only IT article 1997 ftunivleuven 2015-12-22T15:05:07Z During seasonal development of blooms in the Polar Frontal region, concentrations of nitrate and phosphate decreased in surface waters. In blooms of Fragilariopsis kerguelensis at the southern rim (49-50 degrees S) of the Polar Frontal region the dissolved ratio NO3/PO4 increased from the winter value of similar to 14 to 15.8 (18 October 1992) to as high as 25 (23 November 1992). Ambient dissolved Fe in these blooms was subnanomolar compared to similar to 1.1-1.9 nM in the overall Polar Frontal region. Blooms more northerly in the Polar Frontal region were dominated by other diatoms and higher dissolved Fe (>1 nM), and showed only very modest NO3/PO4 anomalies. From nutrient inventories the biogenic pools (PON and DON) and export of settling biogenic debris would have N/P ratios as low as 4.4-6.1 compared to similar to 14 in deep Antarctic waters. Such shifts are consistent with decreasing availability of Fe for nitrate reduction, but also may be due to intrinsically low N/P in Fragilariopsis kerguelensis cells. Moreover, a low ratio DON/DOP in dissolved organic matter and enhanced recycling of N versus P cannot be excluded either. status: published Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Southern Ocean Weddell Sea KU Leuven: Lirias Antarctic Southern Ocean The Antarctic Weddell Sea Weddell Antarctic Ocean |
institution |
Open Polar |
collection |
KU Leuven: Lirias |
op_collection_id |
ftunivleuven |
language |
English |
topic |
southern-ocean atmospheric co2 isopycnal surfaces use efficiencies scotia seas weddell sea phytoplankton carbon fertilization plankton |
spellingShingle |
southern-ocean atmospheric co2 isopycnal surfaces use efficiencies scotia seas weddell sea phytoplankton carbon fertilization plankton DeBaar, HJW VanLeeuwe, MA Scharek, R Goeyens, Leo Bakker, KMJ Fritsche, P Nutrient anomalies in Fragilariopsis kerguelensis blooms, iron deficiency and the nitrate/phosphate ratio (A. C. Redfield) of the Antarctic Ocean |
topic_facet |
southern-ocean atmospheric co2 isopycnal surfaces use efficiencies scotia seas weddell sea phytoplankton carbon fertilization plankton |
description |
During seasonal development of blooms in the Polar Frontal region, concentrations of nitrate and phosphate decreased in surface waters. In blooms of Fragilariopsis kerguelensis at the southern rim (49-50 degrees S) of the Polar Frontal region the dissolved ratio NO3/PO4 increased from the winter value of similar to 14 to 15.8 (18 October 1992) to as high as 25 (23 November 1992). Ambient dissolved Fe in these blooms was subnanomolar compared to similar to 1.1-1.9 nM in the overall Polar Frontal region. Blooms more northerly in the Polar Frontal region were dominated by other diatoms and higher dissolved Fe (>1 nM), and showed only very modest NO3/PO4 anomalies. From nutrient inventories the biogenic pools (PON and DON) and export of settling biogenic debris would have N/P ratios as low as 4.4-6.1 compared to similar to 14 in deep Antarctic waters. Such shifts are consistent with decreasing availability of Fe for nitrate reduction, but also may be due to intrinsically low N/P in Fragilariopsis kerguelensis cells. Moreover, a low ratio DON/DOP in dissolved organic matter and enhanced recycling of N versus P cannot be excluded either. status: published |
format |
Article in Journal/Newspaper |
author |
DeBaar, HJW VanLeeuwe, MA Scharek, R Goeyens, Leo Bakker, KMJ Fritsche, P |
author_facet |
DeBaar, HJW VanLeeuwe, MA Scharek, R Goeyens, Leo Bakker, KMJ Fritsche, P |
author_sort |
DeBaar, HJW |
title |
Nutrient anomalies in Fragilariopsis kerguelensis blooms, iron deficiency and the nitrate/phosphate ratio (A. C. Redfield) of the Antarctic Ocean |
title_short |
Nutrient anomalies in Fragilariopsis kerguelensis blooms, iron deficiency and the nitrate/phosphate ratio (A. C. Redfield) of the Antarctic Ocean |
title_full |
Nutrient anomalies in Fragilariopsis kerguelensis blooms, iron deficiency and the nitrate/phosphate ratio (A. C. Redfield) of the Antarctic Ocean |
title_fullStr |
Nutrient anomalies in Fragilariopsis kerguelensis blooms, iron deficiency and the nitrate/phosphate ratio (A. C. Redfield) of the Antarctic Ocean |
title_full_unstemmed |
Nutrient anomalies in Fragilariopsis kerguelensis blooms, iron deficiency and the nitrate/phosphate ratio (A. C. Redfield) of the Antarctic Ocean |
title_sort |
nutrient anomalies in fragilariopsis kerguelensis blooms, iron deficiency and the nitrate/phosphate ratio (a. c. redfield) of the antarctic ocean |
publisher |
Pergamon-elsevier science ltd |
publishDate |
1997 |
url |
https://lirias.kuleuven.be/handle/123456789/47019 http://links.isiknowledge.com/Links/LinkOut.cgi?PID=ScienceDirect&source_PID=PRODUCT_NAME&origin=WOS_RETURN_URL&type=window&dest=http%3A%2F%2Fgateway.isiknowledge.com%2Fgateway%2FGateway.cgi%3FGWVersion%3D2%26SrcAuth%3DScienceDirect%26SrcApp%3DPRODUCT_NAME%26KeyAID%3DS0967064596001026%26DestApp%3DScienceDirect%26SrcAppSID%3DAPP_SID%26SrcJTitle%3DWURS_TITLE |
geographic |
Antarctic Southern Ocean The Antarctic Weddell Sea Weddell Antarctic Ocean |
geographic_facet |
Antarctic Southern Ocean The Antarctic Weddell Sea Weddell Antarctic Ocean |
genre |
Antarc* Antarctic Antarctic Ocean Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Ocean Southern Ocean Weddell Sea |
op_relation |
Deep-sea research part ii-topical studies in oceanography vol:44 issue:1-2 pages:229-& https://lirias.kuleuven.be/handle/123456789/47019 0967-0645 http://links.isiknowledge.com/Links/LinkOut.cgi?PID=ScienceDirect&source_PID=PRODUCT_NAME&origin=WOS_RETURN_URL&type=window&dest=http%3A%2F%2Fgateway.isiknowledge.com%2Fgateway%2FGateway.cgi%3FGWVersion%3D2%26SrcAuth%3DScienceDirect%26SrcApp%3DPRODUCT_NAME%26KeyAID%3DS0967064596001026%26DestApp%3DScienceDirect%26SrcAppSID%3DAPP_SID%26SrcJTitle%3DWURS_TITLE |
_version_ |
1766266592638795776 |