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 (0.2 μm) sizes. Results show that phytoplankton thrive...
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ftunivtasmania:oai:eprints.utas.edu.au:33642 2023-05-15T13:31:54+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://eprints.utas.edu.au/33642/ unknown Elsevier Science Bv Kanna, N, Lannuzel, D orcid:0000-0001-6154-1837 , van der Merwe, P orcid:0000-0002-7428-8030 and Nishioka, J 2020 , 'Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea' , Marine Chemistry, vol. 221 , pp. 1-8 , doi:10.1016/j.marchem.2020.103774 <http://dx.doi.org/10.1016/j.marchem.2020.103774>. sea ice iron biogeochemistry Antarctica bioavailability size fraction Article PeerReviewed 2020 ftunivtasmania https://doi.org/10.1016/j.marchem.2020.103774 2021-10-04T22:18:02Z 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 (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 Antarc* Antarctica Sea ice University of Tasmania: UTas ePrints Marine Chemistry 221 103774 |
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Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
unknown |
topic |
sea ice iron biogeochemistry Antarctica bioavailability size fraction |
spellingShingle |
sea ice iron biogeochemistry Antarctica bioavailability size fraction 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 |
sea ice iron biogeochemistry Antarctica bioavailability size fraction |
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 (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://eprints.utas.edu.au/33642/ |
genre |
Antarc* Antarctica Sea ice |
genre_facet |
Antarc* Antarctica Sea ice |
op_relation |
Kanna, N, Lannuzel, D orcid:0000-0001-6154-1837 , van der Merwe, P orcid:0000-0002-7428-8030 and Nishioka, J 2020 , 'Size fractionation and bioavailability of iron released from melting sea ice in a subpolar marginal sea' , Marine Chemistry, vol. 221 , pp. 1-8 , doi:10.1016/j.marchem.2020.103774 <http://dx.doi.org/10.1016/j.marchem.2020.103774>. |
op_doi |
https://doi.org/10.1016/j.marchem.2020.103774 |
container_title |
Marine Chemistry |
container_volume |
221 |
container_start_page |
103774 |
_version_ |
1766022258855247872 |