Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea
We incubated Fe-limited seawater with sea-ice sections to evaluate which forms of iron (Fe) released from melting sea ice can favor phytoplankton growth. Biological availability (bioavailability) was approximated by fractionating Fe into soluble (<1000 kDa), colloidal (1000 kDa-0.2 mu m), and lab...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/84982 2023-05-15T18:16:05+02:00 Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea Kanna, Naoya Lannuzel, Delphine van der Merwe, Pier Nishioka, Jun http://hdl.handle.net/2115/84982 https://doi.org/10.1016/j.marchem.2020.103774 eng eng Elsevier http://hdl.handle.net/2115/84982 Marine chemistry, 221: 103774 http://dx.doi.org/10.1016/j.marchem.2020.103774 ©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Iron Sea ice Bioavailability Size fraction 450 article (author version) fthokunivhus https://doi.org/10.1016/j.marchem.2020.103774 2022-11-18T01:05:57Z We incubated Fe-limited seawater with sea-ice sections to evaluate which forms of iron (Fe) released from melting sea ice can favor phytoplankton growth. Biological availability (bioavailability) was approximated by fractionating Fe into soluble (<1000 kDa), colloidal (1000 kDa-0.2 mu m), and labile particulate (> 0.2 mu m) sizes. Results show that phytoplankton thrived after the addition of sea ice. While the labile particulate fraction dominated the total Fe pool in sea ice, the concentration of dissolved Fe (< 0.2 mu m) was likely not enough to support phytoplankton growth in seawater over time. The concentrations and molar ratios of Fe, Mn and Al in acid-digested particles indicate that particulate Fe in sea ice were derived from multiple origins. Specifically, the Fe to Al ratio in sea ice was higher than in lithogenic material, suggesting that the sea ice were enriched with biogenic material. Our study suggests that particulate Fe from sea ice should be considered an important source of biologically available Fe in ice-covered marginal seas. Article in Journal/Newspaper Sea ice Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Marine Chemistry 221 103774 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Iron Sea ice Bioavailability Size fraction 450 |
spellingShingle |
Iron Sea ice Bioavailability Size fraction 450 Kanna, Naoya Lannuzel, Delphine van der Merwe, Pier Nishioka, Jun Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea |
topic_facet |
Iron Sea ice Bioavailability Size fraction 450 |
description |
We incubated Fe-limited seawater with sea-ice sections to evaluate which forms of iron (Fe) released from melting sea ice can favor phytoplankton growth. Biological availability (bioavailability) was approximated by fractionating Fe into soluble (<1000 kDa), colloidal (1000 kDa-0.2 mu m), and labile particulate (> 0.2 mu m) sizes. Results show that phytoplankton thrived after the addition of sea ice. While the labile particulate fraction dominated the total Fe pool in sea ice, the concentration of dissolved Fe (< 0.2 mu m) was likely not enough to support phytoplankton growth in seawater over time. The concentrations and molar ratios of Fe, Mn and Al in acid-digested particles indicate that particulate Fe in sea ice were derived from multiple origins. Specifically, the Fe to Al ratio in sea ice was higher than in lithogenic material, suggesting that the sea ice were enriched with biogenic material. Our study suggests that particulate Fe from sea ice should be considered an important source of biologically available Fe in ice-covered marginal seas. |
format |
Article in Journal/Newspaper |
author |
Kanna, Naoya Lannuzel, Delphine van der Merwe, Pier Nishioka, Jun |
author_facet |
Kanna, Naoya Lannuzel, Delphine van der Merwe, Pier Nishioka, Jun |
author_sort |
Kanna, Naoya |
title |
Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea |
title_short |
Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea |
title_full |
Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea |
title_fullStr |
Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea |
title_full_unstemmed |
Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea |
title_sort |
size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea |
publisher |
Elsevier |
url |
http://hdl.handle.net/2115/84982 https://doi.org/10.1016/j.marchem.2020.103774 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
http://hdl.handle.net/2115/84982 Marine chemistry, 221: 103774 http://dx.doi.org/10.1016/j.marchem.2020.103774 |
op_rights |
©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.marchem.2020.103774 |
container_title |
Marine Chemistry |
container_volume |
221 |
container_start_page |
103774 |
_version_ |
1766189495391092736 |