Size-fractionated labile trace elements in the Northwest Pacific and Southern Oceans
Author Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Marine Chemistry 126 (2011): 108-113, doi:10.1016/j.marchem.2011.04.004. Photosynth...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/4861 2023-05-15T18:24:26+02:00 Size-fractionated labile trace elements in the Northwest Pacific and Southern Oceans Baeyens, W. Bowie, Andrew R. Buesseler, Ken O. Gao, Y. Lamborg, Carl H. Remenyi, Tomas A. Zhang, H. 2011-04-11 application/pdf https://hdl.handle.net/1912/4861 en eng https://doi.org/10.1016/j.marchem.2011.04.004 https://hdl.handle.net/1912/4861 Trace elements Speciation Bioavailability Pacific Ocean Southern Ocean Preprint 2011 ftwhoas https://doi.org/10.1016/j.marchem.2011.04.004 2022-05-28T22:58:27Z Author Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Marine Chemistry 126 (2011): 108-113, doi:10.1016/j.marchem.2011.04.004. Photosynthesis by marine phytoplankton requires bioavailable forms of several trace elements that are found in extremely low concentrations in the open ocean. We have compared the concentration, lability and size distribution (< 1 nm and < 10 nm) of a suite of trace elements that are thought to be limiting to primary productivity as well as a toxic element (Pb) in two High Nutrient Low Chlorophyll (HNLC) regions using a new dynamic speciation technique, Diffusive Gradients in Thin-film (DGT). The labile species trapped within the DGT probes have a size that is smaller or similar than the pore size of algal cell walls and thus present a proxy for bioavailable species. Total Dissolvable trace element concentrations (TD concentration) varied between 0.05 nM (Co) and 4.0 nM (Ni) at K2 (Northwest Pacific Ocean) and between 0.026 nM (Co) and 4.7 nM (Ni) in the Southern Ocean. The smallest size fractionated labile concentrations (< 1 nm) observed at Southern Ocean sampling stations ranged between 0.002 nM (Co) and 2.1 nM (Ni). Moreover, large differences in bioavailable fractions (ratio of labile to TD concentration) were observed between the trace elements. In the Northwest Pacific Ocean Fe, Cu and Mn had lower labile fractions (between 10 and 44%) than Co, Cd, Ni and Pb (between 80 and 100%). In the Southern Ocean a similar trend was observed, and in addition: (1) Co, Cd, Ni and Pb have lower labile fractions in the Southern Ocean than in the Northwest Pacific and (2) the ratios of <1nm to dissolvable element concentrations at some Southern Ocean stations were very low and varied between 4 and16 %. This research was supported by Federal Science Policy Office, Brussels, through contracts EV/03/7A, SD/CA/03A, the Research ... Report Southern Ocean Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Pacific Southern Ocean Marine Chemistry 126 1-4 108 113 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Trace elements Speciation Bioavailability Pacific Ocean Southern Ocean |
spellingShingle |
Trace elements Speciation Bioavailability Pacific Ocean Southern Ocean Baeyens, W. Bowie, Andrew R. Buesseler, Ken O. Gao, Y. Lamborg, Carl H. Remenyi, Tomas A. Zhang, H. Size-fractionated labile trace elements in the Northwest Pacific and Southern Oceans |
topic_facet |
Trace elements Speciation Bioavailability Pacific Ocean Southern Ocean |
description |
Author Posting. © The Author(s), 2011. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Marine Chemistry 126 (2011): 108-113, doi:10.1016/j.marchem.2011.04.004. Photosynthesis by marine phytoplankton requires bioavailable forms of several trace elements that are found in extremely low concentrations in the open ocean. We have compared the concentration, lability and size distribution (< 1 nm and < 10 nm) of a suite of trace elements that are thought to be limiting to primary productivity as well as a toxic element (Pb) in two High Nutrient Low Chlorophyll (HNLC) regions using a new dynamic speciation technique, Diffusive Gradients in Thin-film (DGT). The labile species trapped within the DGT probes have a size that is smaller or similar than the pore size of algal cell walls and thus present a proxy for bioavailable species. Total Dissolvable trace element concentrations (TD concentration) varied between 0.05 nM (Co) and 4.0 nM (Ni) at K2 (Northwest Pacific Ocean) and between 0.026 nM (Co) and 4.7 nM (Ni) in the Southern Ocean. The smallest size fractionated labile concentrations (< 1 nm) observed at Southern Ocean sampling stations ranged between 0.002 nM (Co) and 2.1 nM (Ni). Moreover, large differences in bioavailable fractions (ratio of labile to TD concentration) were observed between the trace elements. In the Northwest Pacific Ocean Fe, Cu and Mn had lower labile fractions (between 10 and 44%) than Co, Cd, Ni and Pb (between 80 and 100%). In the Southern Ocean a similar trend was observed, and in addition: (1) Co, Cd, Ni and Pb have lower labile fractions in the Southern Ocean than in the Northwest Pacific and (2) the ratios of <1nm to dissolvable element concentrations at some Southern Ocean stations were very low and varied between 4 and16 %. This research was supported by Federal Science Policy Office, Brussels, through contracts EV/03/7A, SD/CA/03A, the Research ... |
format |
Report |
author |
Baeyens, W. Bowie, Andrew R. Buesseler, Ken O. Gao, Y. Lamborg, Carl H. Remenyi, Tomas A. Zhang, H. |
author_facet |
Baeyens, W. Bowie, Andrew R. Buesseler, Ken O. Gao, Y. Lamborg, Carl H. Remenyi, Tomas A. Zhang, H. |
author_sort |
Baeyens, W. |
title |
Size-fractionated labile trace elements in the Northwest Pacific and Southern Oceans |
title_short |
Size-fractionated labile trace elements in the Northwest Pacific and Southern Oceans |
title_full |
Size-fractionated labile trace elements in the Northwest Pacific and Southern Oceans |
title_fullStr |
Size-fractionated labile trace elements in the Northwest Pacific and Southern Oceans |
title_full_unstemmed |
Size-fractionated labile trace elements in the Northwest Pacific and Southern Oceans |
title_sort |
size-fractionated labile trace elements in the northwest pacific and southern oceans |
publishDate |
2011 |
url |
https://hdl.handle.net/1912/4861 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://doi.org/10.1016/j.marchem.2011.04.004 https://hdl.handle.net/1912/4861 |
op_doi |
https://doi.org/10.1016/j.marchem.2011.04.004 |
container_title |
Marine Chemistry |
container_volume |
126 |
container_issue |
1-4 |
container_start_page |
108 |
op_container_end_page |
113 |
_version_ |
1766204949354512384 |