Iron uptake and physiological response of 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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crwiley:10.4319/lo.2001.46.7.1802 2024-04-28T08:39:19+00:00 Iron uptake and physiological response of phytoplankton during a mesoscale Southern Ocean iron enrichment Maldonado, Maria T. Boyd, Philip W. LaRoche, Julie Strzepek, Robert Waite, Anya Bowie, Andrew R. Croot, Peter L. Frew, Russell D. Price, Neil M 2001 http://dx.doi.org/10.4319/lo.2001.46.7.1802 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2001.46.7.1802 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2001.46.7.1802 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 46, issue 7, page 1802-1808 ISSN 0024-3590 1939-5590 Aquatic Science Oceanography journal-article 2001 crwiley https://doi.org/10.4319/lo.2001.46.7.1802 2024-04-05T07:39:02Z 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 Wiley Online Library Limnology and Oceanography 46 7 1802 1808 |
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Wiley Online Library |
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language |
English |
topic |
Aquatic Science Oceanography |
spellingShingle |
Aquatic Science Oceanography Maldonado, Maria T. Boyd, Philip W. LaRoche, Julie Strzepek, Robert Waite, Anya Bowie, Andrew R. Croot, Peter L. Frew, Russell D. Price, Neil M Iron uptake and physiological response of phytoplankton during a mesoscale Southern Ocean iron enrichment |
topic_facet |
Aquatic Science 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 |
Maldonado, Maria T. Boyd, Philip W. LaRoche, Julie Strzepek, Robert Waite, Anya Bowie, Andrew R. Croot, Peter L. Frew, Russell D. Price, Neil M |
author_facet |
Maldonado, Maria T. Boyd, Philip W. LaRoche, Julie Strzepek, Robert Waite, Anya Bowie, Andrew R. Croot, Peter L. Frew, Russell D. Price, Neil M |
author_sort |
Maldonado, Maria T. |
title |
Iron uptake and physiological response of phytoplankton during a mesoscale Southern Ocean iron enrichment |
title_short |
Iron uptake and physiological response of phytoplankton during a mesoscale Southern Ocean iron enrichment |
title_full |
Iron uptake and physiological response of phytoplankton during a mesoscale Southern Ocean iron enrichment |
title_fullStr |
Iron uptake and physiological response of phytoplankton during a mesoscale Southern Ocean iron enrichment |
title_full_unstemmed |
Iron uptake and physiological response of phytoplankton during a mesoscale Southern Ocean iron enrichment |
title_sort |
iron uptake and physiological response of phytoplankton during a mesoscale southern ocean iron enrichment |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.4319/lo.2001.46.7.1802 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2001.46.7.1802 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2001.46.7.1802 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Limnology and Oceanography volume 46, issue 7, page 1802-1808 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
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 |
_version_ |
1797570417705091072 |