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 kDa0.2 μm), and labile...
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Online Access: | https://doi.org/10.1016/j.marchem.2020.103774 http://ecite.utas.edu.au/139438 |
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ftunivtasecite:oai:ecite.utas.edu.au:139438 2023-05-15T18:16:06+02:00 Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea Kanna, N Lannuzel, D van der Merwe, P Nishioka, J 2020 https://doi.org/10.1016/j.marchem.2020.103774 http://ecite.utas.edu.au/139438 en eng Elsevier Science Bv http://dx.doi.org/10.1016/j.marchem.2020.103774 Kanna, N and Lannuzel, D and van der Merwe, P and Nishioka, J, Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea, Marine Chemistry, 221 Article 103774. ISSN 0304-4203 (2020) [Refereed Article] http://ecite.utas.edu.au/139438 Earth Sciences Oceanography Chemical oceanography Refereed Article PeerReviewed 2020 ftunivtasecite https://doi.org/10.1016/j.marchem.2020.103774 2022-08-29T22:17:57Z 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 kDa0.2 μm), and labile particulate (>0.2 μm) 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 μm) 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 eCite UTAS (University of Tasmania) Marine Chemistry 221 103774 |
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Open Polar |
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eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Chemical oceanography |
spellingShingle |
Earth Sciences Oceanography Chemical oceanography Kanna, N Lannuzel, D van der Merwe, P Nishioka, J Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea |
topic_facet |
Earth Sciences Oceanography Chemical oceanography |
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 kDa0.2 μm), and labile particulate (>0.2 μm) 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 μm) 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, N Lannuzel, D van der Merwe, P Nishioka, J |
author_facet |
Kanna, N Lannuzel, D van der Merwe, P Nishioka, J |
author_sort |
Kanna, N |
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 Science Bv |
publishDate |
2020 |
url |
https://doi.org/10.1016/j.marchem.2020.103774 http://ecite.utas.edu.au/139438 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
http://dx.doi.org/10.1016/j.marchem.2020.103774 Kanna, N and Lannuzel, D and van der Merwe, P and Nishioka, J, Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea, Marine Chemistry, 221 Article 103774. ISSN 0304-4203 (2020) [Refereed Article] http://ecite.utas.edu.au/139438 |
op_doi |
https://doi.org/10.1016/j.marchem.2020.103774 |
container_title |
Marine Chemistry |
container_volume |
221 |
container_start_page |
103774 |
_version_ |
1766189537992638464 |