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Biogeosciences An interactive open-access journal of the European Geosciences Union
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BG | Volume 16, issue 5
Biogeosciences, 16, 999–1017, 2019
https://doi.org/10.5194/bg-16-999-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: GEOVIDE, an international GEOTRACES study along the OVIDE...

Biogeosciences, 16, 999–1017, 2019
https://doi.org/10.5194/bg-16-999-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 13 Mar 2019

Research article | 13 Mar 2019

Evidence of high N2 fixation rates in the temperate northeast Atlantic

Debany Fonseca-Batista et al.
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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.
Dinitrogen fixation and primary production were investigated using stable isotope incubation...
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