Elevated iron to nitrogen recycling by mesozooplankton in the Northeast Atlantic Ocean
Low dissolved iron (DFe) concentrations limit primary production in most high-nutrient low-chlorophyll (HNLC) regions. Increased recycling of iron (Fe) relative to nitrogen (N) by zooplankton may help to sustain phytoplankton production in these conditions. We concurrently determined rates of DFe an...
Published in: | Geophysical Research Letters |
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2012
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ftsouthampton:oai:eprints.soton.ac.uk:341898 2023-08-27T04:11:07+02:00 Elevated iron to nitrogen recycling by mesozooplankton in the Northeast Atlantic Ocean Giering, Sarah L.C. Steigenberger, Sebastian Achterberg, Eric P. Sanders, Richard Mayor, Daniel J 2012 https://eprints.soton.ac.uk/341898/ unknown Giering, Sarah L.C., Steigenberger, Sebastian, Achterberg, Eric P., Sanders, Richard and Mayor, Daniel J, (2012) Elevated iron to nitrogen recycling by mesozooplankton in the Northeast Atlantic Ocean. Geophysical Research Letters, 39 (12), L12608. (doi:10.1029/2012GL051776 <http://dx.doi.org/10.1029/2012GL051776>). Article PeerReviewed 2012 ftsouthampton https://doi.org/10.1029/2012GL051776 2023-08-03T22:20:03Z Low dissolved iron (DFe) concentrations limit primary production in most high-nutrient low-chlorophyll (HNLC) regions. Increased recycling of iron (Fe) relative to nitrogen (N) by zooplankton may help to sustain phytoplankton production in these conditions. We concurrently determined rates of DFe and ammonium (NH4+) recycling by natural mesozooplankton communities in HNLC conditions of the Northeast Atlantic. NH4+ excretion remained constant and ranged between 14.2–54.1 nmol NH4+ mg dry weight?1 h?1. Fe recycling ranged between 6–138 pmol DFe mg dry weight?1 h?1 during the first hour and decreased thereafter, reflecting the transition from the loss of phytoplankton-derived Fe to basal DFe excretion. Mesozooplankton-driven nutrient recycling was estimated to support 6–59% and <1–13% of the respective phytoplankton requirements for DFe and N; DFe:N regeneration ratios were 5–26 times larger than those required by phytoplankton. Our data suggest that Fe recycling by grazing organisms has the potential to reduce the intensity of HNLC conditions. Article in Journal/Newspaper Northeast Atlantic University of Southampton: e-Prints Soton Geophysical Research Letters 39 12 n/a n/a |
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University of Southampton: e-Prints Soton |
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ftsouthampton |
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Low dissolved iron (DFe) concentrations limit primary production in most high-nutrient low-chlorophyll (HNLC) regions. Increased recycling of iron (Fe) relative to nitrogen (N) by zooplankton may help to sustain phytoplankton production in these conditions. We concurrently determined rates of DFe and ammonium (NH4+) recycling by natural mesozooplankton communities in HNLC conditions of the Northeast Atlantic. NH4+ excretion remained constant and ranged between 14.2–54.1 nmol NH4+ mg dry weight?1 h?1. Fe recycling ranged between 6–138 pmol DFe mg dry weight?1 h?1 during the first hour and decreased thereafter, reflecting the transition from the loss of phytoplankton-derived Fe to basal DFe excretion. Mesozooplankton-driven nutrient recycling was estimated to support 6–59% and <1–13% of the respective phytoplankton requirements for DFe and N; DFe:N regeneration ratios were 5–26 times larger than those required by phytoplankton. Our data suggest that Fe recycling by grazing organisms has the potential to reduce the intensity of HNLC conditions. |
format |
Article in Journal/Newspaper |
author |
Giering, Sarah L.C. Steigenberger, Sebastian Achterberg, Eric P. Sanders, Richard Mayor, Daniel J |
spellingShingle |
Giering, Sarah L.C. Steigenberger, Sebastian Achterberg, Eric P. Sanders, Richard Mayor, Daniel J Elevated iron to nitrogen recycling by mesozooplankton in the Northeast Atlantic Ocean |
author_facet |
Giering, Sarah L.C. Steigenberger, Sebastian Achterberg, Eric P. Sanders, Richard Mayor, Daniel J |
author_sort |
Giering, Sarah L.C. |
title |
Elevated iron to nitrogen recycling by mesozooplankton in the Northeast Atlantic Ocean |
title_short |
Elevated iron to nitrogen recycling by mesozooplankton in the Northeast Atlantic Ocean |
title_full |
Elevated iron to nitrogen recycling by mesozooplankton in the Northeast Atlantic Ocean |
title_fullStr |
Elevated iron to nitrogen recycling by mesozooplankton in the Northeast Atlantic Ocean |
title_full_unstemmed |
Elevated iron to nitrogen recycling by mesozooplankton in the Northeast Atlantic Ocean |
title_sort |
elevated iron to nitrogen recycling by mesozooplankton in the northeast atlantic ocean |
publishDate |
2012 |
url |
https://eprints.soton.ac.uk/341898/ |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
Giering, Sarah L.C., Steigenberger, Sebastian, Achterberg, Eric P., Sanders, Richard and Mayor, Daniel J, (2012) Elevated iron to nitrogen recycling by mesozooplankton in the Northeast Atlantic Ocean. Geophysical Research Letters, 39 (12), L12608. (doi:10.1029/2012GL051776 <http://dx.doi.org/10.1029/2012GL051776>). |
op_doi |
https://doi.org/10.1029/2012GL051776 |
container_title |
Geophysical Research Letters |
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39 |
container_issue |
12 |
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n/a |
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n/a |
_version_ |
1775353633428209664 |