Articles | Volume 16, issue 5
https://doi.org/10.5194/bg-16-999-2019
https://doi.org/10.5194/bg-16-999-2019
Research article
 | 
13 Mar 2019
Research article |  | 13 Mar 2019

Evidence of high N2 fixation rates in the temperate northeast Atlantic

Debany Fonseca-Batista, Xuefeng Li, Virginie Riou, Valérie Michotey, Florian Deman, François Fripiat, Sophie Guasco, Natacha Brion, Nolwenn Lemaitre, Manon Tonnard, Morgane Gallinari, Hélène Planquette, Frédéric Planchon, Géraldine Sarthou, Marc Elskens, Julie LaRoche, Lei Chou, and Frank Dehairs

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (20 Nov 2018) by Zhongjun Jia
AR by Anna Wenzel on behalf of the Authors (04 Jan 2019)  Author's response
ED: Publish subject to minor revisions (review by editor) (21 Jan 2019) by Zhongjun Jia
AR by Debany Fonseca Pereira Batista on behalf of the Authors (04 Feb 2019)  Author's response    Manuscript
ED: Publish subject to technical corrections (19 Feb 2019) by Zhongjun Jia
AR by Debany Fonseca Pereira Batista on behalf of the Authors (22 Feb 2019)  Author's response    Manuscript
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Short summary
Dinitrogen fixation and primary production were investigated using stable isotope incubation experiments along two transects off the Western Iberian Margin in May 2014 close to the end of the phytoplankton spring bloom. We observed substantial N2 fixation activities (up to 1533 µmol N m-2 d-1) associated with a predominance of unicellular cyanobacteria and non-cyanobacterial diazotrophs, which seemed to be promoted by the presence of bloom-derived organic matter and excess phosphorus.
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