A seasonal study of dissolved cobalt in the Ross Sea, Antarctica : micronutrient behavior, absence of scavenging, and relationships with Zn, Cd, and P
© The Authors, 2010. This article is distributed under the terms of the Creative Commons Attribution 3.0 License. The definitive version was published in Biogeosciences 7 (2010): 4059-4082, doi:10.5194/bg-7-4059-2010. We report the distribution of cobalt (Co) in the Ross Sea polynya during austral s...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/4327 2023-05-15T13:53:14+02:00 A seasonal study of dissolved cobalt in the Ross Sea, Antarctica : micronutrient behavior, absence of scavenging, and relationships with Zn, Cd, and P Saito, Mak A. Goepfert, Tyler J. Noble, Abigail E. Bertrand, Erin M. Sedwick, Peter N. DiTullio, Giacomo R. 2010-12-22 application/pdf https://hdl.handle.net/1912/4327 en eng Copernicus Publications on behalf of the European Geosciences Union https://doi.org/10.5194/bg-7-4059-2010 Biogeosciences 7 (2010): 4059-4082 https://hdl.handle.net/1912/4327 doi:10.5194/bg-7-4059-2010 Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0/ CC-BY Biogeosciences 7 (2010): 4059-4082 doi:10.5194/bg-7-4059-2010 Article 2010 ftwhoas https://doi.org/10.5194/bg-7-4059-2010 2022-05-28T22:58:16Z © The Authors, 2010. This article is distributed under the terms of the Creative Commons Attribution 3.0 License. The definitive version was published in Biogeosciences 7 (2010): 4059-4082, doi:10.5194/bg-7-4059-2010. We report the distribution of cobalt (Co) in the Ross Sea polynya during austral summer 2005–2006 and the following austral spring 2006. The vertical distribution of total dissolved Co (dCo) was similar to soluble reactive phosphate (PO43−), with dCo and PO43− showing a significant correlation throughout the water column (r2 = 0.87, 164 samples). A strong seasonal signal for dCo was observed, with most spring samples having concentrations ranging from ~45–85 pM, whereas summer dCo values were depleted below these levels by biological activity. Surface transect data from the summer cruise revealed concentrations at the low range of this seasonal variability (~30 pM dCo), with concentrations as low as 20 pM observed in some regions where PO43− was depleted to ~0.1 μM. Both complexed Co, defined as the fraction of dCo bound by strong organic ligands, and labile Co, defined as the fraction of dCo not bound by these ligands, were typically observed in significant concentrations throughout the water column. This contrasts the depletion of labile Co observed in the euphotic zone of other ocean regions, suggesting a much higher bioavailability for Co in the Ross Sea. An ecological stoichiometry of 37.6 μmol Co:mol−1 PO43− calculated from dissolved concentrations was similar to values observed in the subarctic Pacific, but approximately tenfold lower than values in the Eastern Tropical Pacific and Equatorial Atlantic. The ecological stoichiometries for dissolved Co and Zn suggest a greater overall use of Zn relative to Co in the shallow waters of the Ross Sea, with a Co:PO43−/Zn:PO43− ratio of 1:17. Comparison of these observed stoichiometries with values estimated in culture studies suggests that Zn is a key micronutrient that likely influences phytoplankton diversity in the Ross Sea. In contrast, the ... Article in Journal/Newspaper Antarc* Antarctica Ross Sea Subarctic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Austral Pacific Ross Sea Biogeosciences 7 12 4059 4082 |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
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ftwhoas |
language |
English |
description |
© The Authors, 2010. This article is distributed under the terms of the Creative Commons Attribution 3.0 License. The definitive version was published in Biogeosciences 7 (2010): 4059-4082, doi:10.5194/bg-7-4059-2010. We report the distribution of cobalt (Co) in the Ross Sea polynya during austral summer 2005–2006 and the following austral spring 2006. The vertical distribution of total dissolved Co (dCo) was similar to soluble reactive phosphate (PO43−), with dCo and PO43− showing a significant correlation throughout the water column (r2 = 0.87, 164 samples). A strong seasonal signal for dCo was observed, with most spring samples having concentrations ranging from ~45–85 pM, whereas summer dCo values were depleted below these levels by biological activity. Surface transect data from the summer cruise revealed concentrations at the low range of this seasonal variability (~30 pM dCo), with concentrations as low as 20 pM observed in some regions where PO43− was depleted to ~0.1 μM. Both complexed Co, defined as the fraction of dCo bound by strong organic ligands, and labile Co, defined as the fraction of dCo not bound by these ligands, were typically observed in significant concentrations throughout the water column. This contrasts the depletion of labile Co observed in the euphotic zone of other ocean regions, suggesting a much higher bioavailability for Co in the Ross Sea. An ecological stoichiometry of 37.6 μmol Co:mol−1 PO43− calculated from dissolved concentrations was similar to values observed in the subarctic Pacific, but approximately tenfold lower than values in the Eastern Tropical Pacific and Equatorial Atlantic. The ecological stoichiometries for dissolved Co and Zn suggest a greater overall use of Zn relative to Co in the shallow waters of the Ross Sea, with a Co:PO43−/Zn:PO43− ratio of 1:17. Comparison of these observed stoichiometries with values estimated in culture studies suggests that Zn is a key micronutrient that likely influences phytoplankton diversity in the Ross Sea. In contrast, the ... |
format |
Article in Journal/Newspaper |
author |
Saito, Mak A. Goepfert, Tyler J. Noble, Abigail E. Bertrand, Erin M. Sedwick, Peter N. DiTullio, Giacomo R. |
spellingShingle |
Saito, Mak A. Goepfert, Tyler J. Noble, Abigail E. Bertrand, Erin M. Sedwick, Peter N. DiTullio, Giacomo R. A seasonal study of dissolved cobalt in the Ross Sea, Antarctica : micronutrient behavior, absence of scavenging, and relationships with Zn, Cd, and P |
author_facet |
Saito, Mak A. Goepfert, Tyler J. Noble, Abigail E. Bertrand, Erin M. Sedwick, Peter N. DiTullio, Giacomo R. |
author_sort |
Saito, Mak A. |
title |
A seasonal study of dissolved cobalt in the Ross Sea, Antarctica : micronutrient behavior, absence of scavenging, and relationships with Zn, Cd, and P |
title_short |
A seasonal study of dissolved cobalt in the Ross Sea, Antarctica : micronutrient behavior, absence of scavenging, and relationships with Zn, Cd, and P |
title_full |
A seasonal study of dissolved cobalt in the Ross Sea, Antarctica : micronutrient behavior, absence of scavenging, and relationships with Zn, Cd, and P |
title_fullStr |
A seasonal study of dissolved cobalt in the Ross Sea, Antarctica : micronutrient behavior, absence of scavenging, and relationships with Zn, Cd, and P |
title_full_unstemmed |
A seasonal study of dissolved cobalt in the Ross Sea, Antarctica : micronutrient behavior, absence of scavenging, and relationships with Zn, Cd, and P |
title_sort |
seasonal study of dissolved cobalt in the ross sea, antarctica : micronutrient behavior, absence of scavenging, and relationships with zn, cd, and p |
publisher |
Copernicus Publications on behalf of the European Geosciences Union |
publishDate |
2010 |
url |
https://hdl.handle.net/1912/4327 |
geographic |
Austral Pacific Ross Sea |
geographic_facet |
Austral Pacific Ross Sea |
genre |
Antarc* Antarctica Ross Sea Subarctic |
genre_facet |
Antarc* Antarctica Ross Sea Subarctic |
op_source |
Biogeosciences 7 (2010): 4059-4082 doi:10.5194/bg-7-4059-2010 |
op_relation |
https://doi.org/10.5194/bg-7-4059-2010 Biogeosciences 7 (2010): 4059-4082 https://hdl.handle.net/1912/4327 doi:10.5194/bg-7-4059-2010 |
op_rights |
Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/bg-7-4059-2010 |
container_title |
Biogeosciences |
container_volume |
7 |
container_issue |
12 |
container_start_page |
4059 |
op_container_end_page |
4082 |
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1766258231805476864 |