High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy
The stoichiometry of physical nutrient supply may provide a constraint on the spatial distribution and rate of marine nitrogen (N2) fixation. Yet agreement between the N2 fixation rates inferred from nutrient supply and those directly measured has been lacking. The relative transport of phosphate an...
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ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-1697 2024-09-15T18:21:53+00:00 High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy Palter, Jaime B. Ames, Elana J Benavides, Mar Goncalves Neto, Afonso Granger, Julie Moisander, Pia H Watkins-Brandt, Katie S White, Angelicque E 2020-07-19T07:00:00Z application/pdf https://digitalcommons.uri.edu/gsofacpubs/731 https://doi.org/10.1029/2020GL089103 https://digitalcommons.uri.edu/context/gsofacpubs/article/1697/viewcontent/2020GL089103.pdf unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/731 doi:10.1029/2020GL089103 https://digitalcommons.uri.edu/context/gsofacpubs/article/1697/viewcontent/2020GL089103.pdf http://creativecommons.org/licenses/by/4.0/ Graduate School of Oceanography Faculty Publications text 2020 ftunivrhodeislan https://doi.org/10.1029/2020GL089103 2024-08-21T00:09:33Z The stoichiometry of physical nutrient supply may provide a constraint on the spatial distribution and rate of marine nitrogen (N2) fixation. Yet agreement between the N2 fixation rates inferred from nutrient supply and those directly measured has been lacking. The relative transport of phosphate and nitrate across the Gulf Stream suggests that 3–6 Tg N year−1 must be fixed to maintain steady nutrient stoichiometry in the North Atlantic subtropical gyre. Here we show direct measurements of N2 fixation consistent with these estimates, suggesting elevated N2 fixation in and near the Gulf Stream. At some locations across the Gulf Stream, we measured diazotroph abundances and N2 fixation rates that are 1–3 orders of magnitude greater than previously measured in the central North Atlantic subtropical gyre. In combination, rate measurements and gene abundances suggest that biogeochemical budgets can be a robust predictive tool for N2 fixation hot spots in the global ocean. Text North Atlantic University of Rhode Island: DigitalCommons@URI Geophysical Research Letters 47 16 |
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Open Polar |
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University of Rhode Island: DigitalCommons@URI |
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ftunivrhodeislan |
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description |
The stoichiometry of physical nutrient supply may provide a constraint on the spatial distribution and rate of marine nitrogen (N2) fixation. Yet agreement between the N2 fixation rates inferred from nutrient supply and those directly measured has been lacking. The relative transport of phosphate and nitrate across the Gulf Stream suggests that 3–6 Tg N year−1 must be fixed to maintain steady nutrient stoichiometry in the North Atlantic subtropical gyre. Here we show direct measurements of N2 fixation consistent with these estimates, suggesting elevated N2 fixation in and near the Gulf Stream. At some locations across the Gulf Stream, we measured diazotroph abundances and N2 fixation rates that are 1–3 orders of magnitude greater than previously measured in the central North Atlantic subtropical gyre. In combination, rate measurements and gene abundances suggest that biogeochemical budgets can be a robust predictive tool for N2 fixation hot spots in the global ocean. |
format |
Text |
author |
Palter, Jaime B. Ames, Elana J Benavides, Mar Goncalves Neto, Afonso Granger, Julie Moisander, Pia H Watkins-Brandt, Katie S White, Angelicque E |
spellingShingle |
Palter, Jaime B. Ames, Elana J Benavides, Mar Goncalves Neto, Afonso Granger, Julie Moisander, Pia H Watkins-Brandt, Katie S White, Angelicque E High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy |
author_facet |
Palter, Jaime B. Ames, Elana J Benavides, Mar Goncalves Neto, Afonso Granger, Julie Moisander, Pia H Watkins-Brandt, Katie S White, Angelicque E |
author_sort |
Palter, Jaime B. |
title |
High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy |
title_short |
High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy |
title_full |
High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy |
title_fullStr |
High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy |
title_full_unstemmed |
High N2 Fixation in and Near the Gulf Stream Consistent with a Circulation Control on Diazotrophy |
title_sort |
high n2 fixation in and near the gulf stream consistent with a circulation control on diazotrophy |
publisher |
DigitalCommons@URI |
publishDate |
2020 |
url |
https://digitalcommons.uri.edu/gsofacpubs/731 https://doi.org/10.1029/2020GL089103 https://digitalcommons.uri.edu/context/gsofacpubs/article/1697/viewcontent/2020GL089103.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/731 doi:10.1029/2020GL089103 https://digitalcommons.uri.edu/context/gsofacpubs/article/1697/viewcontent/2020GL089103.pdf |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1029/2020GL089103 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
16 |
_version_ |
1810460918112321536 |