Organic complexation of cobalt across the Antarctic Polar Front in the Southern Ocean
There is compelling evidence to demonstrate that phytoplankton in major regions of the world's oceans are limited by the availability of certain trace elements, notably iron. Cobalt concentrations in open-ocean waters generally range between 10 and 120 pmol L-1 but such levels were not thought...
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Online Access: | http://hdl.handle.net/1885/19385 https://doi.org/10.1071/MF05097 |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/19385 2024-01-14T10:02:20+01:00 Organic complexation of cobalt across the Antarctic Polar Front in the Southern Ocean Ellwood, Michael van den Berg, Constant M G Boye, Marie Veldhuis, Marcel de Jong, Jeroen T.M. de Baar, Hein J W Croot, Peter L Kattner, Gerhard http://hdl.handle.net/1885/19385 https://doi.org/10.1071/MF05097 unknown CSLI Publications 1323-1650 http://hdl.handle.net/1885/19385 doi:10.1071/MF05097 Marine and Freshwater Research Keywords: ligand nutrient availability phytoplankton polar front speciation (biology) oceanic regions Southern Ocean World algae Eukaryota Prokaryota Ligands Speciation Journal article ftanucanberra https://doi.org/10.1071/MF05097 2023-12-15T09:34:10Z There is compelling evidence to demonstrate that phytoplankton in major regions of the world's oceans are limited by the availability of certain trace elements, notably iron. Cobalt concentrations in open-ocean waters generally range between 10 and 120 pmol L-1 but such levels were not thought to limit phytoplankton growth. Herein, we present data for total dissolved cobalt and cobalt-complexing ligands for two stations located south (station 200) and north (station 204) of the Antarctic Polar Front (APF) along 20°E in the South Atlantic sector of the Southern Ocean. Results indicate that there was little difference between total cobalt concentrations south and north of the APF, whereas ligand concentrations were significantly higher (15-20 pmol L -1) for the upper water column south of the APF. Productivity in these waters was low at the time of this study; however, numbers of large eukaryotic algal species were higher south of the APF, while north of the APF small eukaryotic and prokaryotic species dominated. The higher ligand concentrations measured at the southern station are probably related to higher algal numbers at this site. Because ligand concentrations were higher, inorganic cobalt concentrations (Co′) south of the APF are extremely low, at femtomolar levels, whereas north of the APF calculated Co′ are much higher at picomolar levels where ligand concentrations were lower. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Australian National University: ANU Digital Collections Antarctic Southern Ocean The Antarctic Marine and Freshwater Research 56 8 1069 |
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Australian National University: ANU Digital Collections |
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ftanucanberra |
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unknown |
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Keywords: ligand nutrient availability phytoplankton polar front speciation (biology) oceanic regions Southern Ocean World algae Eukaryota Prokaryota Ligands Speciation |
spellingShingle |
Keywords: ligand nutrient availability phytoplankton polar front speciation (biology) oceanic regions Southern Ocean World algae Eukaryota Prokaryota Ligands Speciation Ellwood, Michael van den Berg, Constant M G Boye, Marie Veldhuis, Marcel de Jong, Jeroen T.M. de Baar, Hein J W Croot, Peter L Kattner, Gerhard Organic complexation of cobalt across the Antarctic Polar Front in the Southern Ocean |
topic_facet |
Keywords: ligand nutrient availability phytoplankton polar front speciation (biology) oceanic regions Southern Ocean World algae Eukaryota Prokaryota Ligands Speciation |
description |
There is compelling evidence to demonstrate that phytoplankton in major regions of the world's oceans are limited by the availability of certain trace elements, notably iron. Cobalt concentrations in open-ocean waters generally range between 10 and 120 pmol L-1 but such levels were not thought to limit phytoplankton growth. Herein, we present data for total dissolved cobalt and cobalt-complexing ligands for two stations located south (station 200) and north (station 204) of the Antarctic Polar Front (APF) along 20°E in the South Atlantic sector of the Southern Ocean. Results indicate that there was little difference between total cobalt concentrations south and north of the APF, whereas ligand concentrations were significantly higher (15-20 pmol L -1) for the upper water column south of the APF. Productivity in these waters was low at the time of this study; however, numbers of large eukaryotic algal species were higher south of the APF, while north of the APF small eukaryotic and prokaryotic species dominated. The higher ligand concentrations measured at the southern station are probably related to higher algal numbers at this site. Because ligand concentrations were higher, inorganic cobalt concentrations (Co′) south of the APF are extremely low, at femtomolar levels, whereas north of the APF calculated Co′ are much higher at picomolar levels where ligand concentrations were lower. |
format |
Article in Journal/Newspaper |
author |
Ellwood, Michael van den Berg, Constant M G Boye, Marie Veldhuis, Marcel de Jong, Jeroen T.M. de Baar, Hein J W Croot, Peter L Kattner, Gerhard |
author_facet |
Ellwood, Michael van den Berg, Constant M G Boye, Marie Veldhuis, Marcel de Jong, Jeroen T.M. de Baar, Hein J W Croot, Peter L Kattner, Gerhard |
author_sort |
Ellwood, Michael |
title |
Organic complexation of cobalt across the Antarctic Polar Front in the Southern Ocean |
title_short |
Organic complexation of cobalt across the Antarctic Polar Front in the Southern Ocean |
title_full |
Organic complexation of cobalt across the Antarctic Polar Front in the Southern Ocean |
title_fullStr |
Organic complexation of cobalt across the Antarctic Polar Front in the Southern Ocean |
title_full_unstemmed |
Organic complexation of cobalt across the Antarctic Polar Front in the Southern Ocean |
title_sort |
organic complexation of cobalt across the antarctic polar front in the southern ocean |
publisher |
CSLI Publications |
url |
http://hdl.handle.net/1885/19385 https://doi.org/10.1071/MF05097 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Marine and Freshwater Research |
op_relation |
1323-1650 http://hdl.handle.net/1885/19385 doi:10.1071/MF05097 |
op_doi |
https://doi.org/10.1071/MF05097 |
container_title |
Marine and Freshwater Research |
container_volume |
56 |
container_issue |
8 |
container_start_page |
1069 |
_version_ |
1788057305704562688 |