Iron uptake and physiological response to phytoplankton during a mesoscale Southern Ocean iron enrichment
Iron supply is thought to regulate primary production in high nitrate, low chlorophyll (HNLC) regions of the sea in both the past and the present. A critical aspect of this relationship is acquisition of iron (Fe) by phytoplankton, which occurs through a complex series of extracellular reactions tha...
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American Society of Limnology and Oceanography
2001
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Online Access: | https://doi.org/10.4319/lo.2001.46.7.1802 http://ecite.utas.edu.au/26313 |
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ftunivtasecite:oai:ecite.utas.edu.au:26313 2023-05-15T18:24:45+02:00 Iron uptake and physiological response to phytoplankton during a mesoscale Southern Ocean iron enrichment Boyd, PW LaRoche, J Strzepek, R Waite, A Bowie, AR Croot, PL Frew, RD Price, NM 2001 https://doi.org/10.4319/lo.2001.46.7.1802 http://ecite.utas.edu.au/26313 en eng American Society of Limnology and Oceanography http://dx.doi.org/10.4319/lo.2001.46.7.1802 Boyd, PW and LaRoche, J and Strzepek, R and Waite, A and Bowie, AR and Croot, PL and Frew, RD and Price, NM, Iron uptake and physiological response to phytoplankton during a mesoscale Southern Ocean iron enrichment, Limnology and Oceanography, 46, (7) pp. 1802-1808. ISSN 0024-3590 (2001) [Refereed Article] http://ecite.utas.edu.au/26313 Earth Sciences Oceanography Biological Oceanography Refereed Article PeerReviewed 2001 ftunivtasecite https://doi.org/10.4319/lo.2001.46.7.1802 2019-12-13T21:07:17Z Iron supply is thought to regulate primary production in high nitrate, low chlorophyll (HNLC) regions of the sea in both the past and the present. A critical aspect of this relationship is acquisition of iron (Fe) by phytoplankton, which occurs through a complex series of extracellular reactions that are influenced by Fe chemistry and speciation. During the first in situ mesoscale Fe-enrichment experiment in the Southern Ocean (Southern Ocean iron release experiment [SOIREE]), we monitored the uptake of Fe by three size classes of plankton and their ensuing physiological response to the Fe enrichment. Rates of Fe uptake from both inorganic Fe (Fe) and organic Fe complexes (FeL) were initially fast, indicative of Fe-limitation. After Fe enrichment phytoplankton down-regulated Fe uptake and optimized physiological performance, but by day 12 they had greatly increased their capacity to acquire Fe from FeL. The increase in Fe uptake from FeL coincided with a sixfold decrease in Fe that followed the production of Fe-binding organic ligands. Phytoplankton were able to use organically bound Fe at rates sufficient to maintain net growth for more than 42 d. Adaptation to such shifts in Fe chemistry may contribute to bloom longevity in these polar HNLC waters. Article in Journal/Newspaper Southern Ocean eCite UTAS (University of Tasmania) Southern Ocean Limnology and Oceanography 46 7 1802 1808 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Biological Oceanography |
spellingShingle |
Earth Sciences Oceanography Biological Oceanography Boyd, PW LaRoche, J Strzepek, R Waite, A Bowie, AR Croot, PL Frew, RD Price, NM Iron uptake and physiological response to phytoplankton during a mesoscale Southern Ocean iron enrichment |
topic_facet |
Earth Sciences Oceanography Biological Oceanography |
description |
Iron supply is thought to regulate primary production in high nitrate, low chlorophyll (HNLC) regions of the sea in both the past and the present. A critical aspect of this relationship is acquisition of iron (Fe) by phytoplankton, which occurs through a complex series of extracellular reactions that are influenced by Fe chemistry and speciation. During the first in situ mesoscale Fe-enrichment experiment in the Southern Ocean (Southern Ocean iron release experiment [SOIREE]), we monitored the uptake of Fe by three size classes of plankton and their ensuing physiological response to the Fe enrichment. Rates of Fe uptake from both inorganic Fe (Fe) and organic Fe complexes (FeL) were initially fast, indicative of Fe-limitation. After Fe enrichment phytoplankton down-regulated Fe uptake and optimized physiological performance, but by day 12 they had greatly increased their capacity to acquire Fe from FeL. The increase in Fe uptake from FeL coincided with a sixfold decrease in Fe that followed the production of Fe-binding organic ligands. Phytoplankton were able to use organically bound Fe at rates sufficient to maintain net growth for more than 42 d. Adaptation to such shifts in Fe chemistry may contribute to bloom longevity in these polar HNLC waters. |
format |
Article in Journal/Newspaper |
author |
Boyd, PW LaRoche, J Strzepek, R Waite, A Bowie, AR Croot, PL Frew, RD Price, NM |
author_facet |
Boyd, PW LaRoche, J Strzepek, R Waite, A Bowie, AR Croot, PL Frew, RD Price, NM |
author_sort |
Boyd, PW |
title |
Iron uptake and physiological response to phytoplankton during a mesoscale Southern Ocean iron enrichment |
title_short |
Iron uptake and physiological response to phytoplankton during a mesoscale Southern Ocean iron enrichment |
title_full |
Iron uptake and physiological response to phytoplankton during a mesoscale Southern Ocean iron enrichment |
title_fullStr |
Iron uptake and physiological response to phytoplankton during a mesoscale Southern Ocean iron enrichment |
title_full_unstemmed |
Iron uptake and physiological response to phytoplankton during a mesoscale Southern Ocean iron enrichment |
title_sort |
iron uptake and physiological response to phytoplankton during a mesoscale southern ocean iron enrichment |
publisher |
American Society of Limnology and Oceanography |
publishDate |
2001 |
url |
https://doi.org/10.4319/lo.2001.46.7.1802 http://ecite.utas.edu.au/26313 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://dx.doi.org/10.4319/lo.2001.46.7.1802 Boyd, PW and LaRoche, J and Strzepek, R and Waite, A and Bowie, AR and Croot, PL and Frew, RD and Price, NM, Iron uptake and physiological response to phytoplankton during a mesoscale Southern Ocean iron enrichment, Limnology and Oceanography, 46, (7) pp. 1802-1808. ISSN 0024-3590 (2001) [Refereed Article] http://ecite.utas.edu.au/26313 |
op_doi |
https://doi.org/10.4319/lo.2001.46.7.1802 |
container_title |
Limnology and Oceanography |
container_volume |
46 |
container_issue |
7 |
container_start_page |
1802 |
op_container_end_page |
1808 |
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1766205615055568896 |