Articles | Volume 15, issue 14
https://doi.org/10.5194/bg-15-4333-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-15-4333-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 Jul 2018
Research article |
| 18 Jul 2018
| 18 Jul 2018
Modelling N2 fixation related to Trichodesmium sp.: driving processes and impacts on primary production in the tropical Pacific Ocean
Centre IRD, Nouméa, New Caledonia
LOCEAN Laboratory, IPSL, Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, Paris, France
Olivier Aumont
LOCEAN Laboratory, IPSL, Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, Paris, France
Thomas Gorguès
Laboratoire d'Océanographie Physique et Spatiale (LOPS), Univ. Brest-CNRS-Ifremer-IRD, Plouzané, France
Anne Lorrain
LEMAR, UMR 6539, UBO-CNRS-Ifremer-IRD, IUEM, Plouzané, France
Sophie Bonnet
Aix Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO) UM 110, 13288, Marseille, France
Martine Rodier
Environnement Insulaire Océanien (EIO), UMR 241 (Univ. de Polynésie Française, IRD, ILM, IFREMER), Tahiti, French Polynesia
Cécile Dupouy
Centre IRD, Nouméa, New Caledonia
Aix Marseille Université, CNRS/INSU, Université de Toulon, IRD, Mediterranean Institute of Oceanography (MIO) UM 110, 13288, Marseille, France
Takuhei Shiozaki
Research and Development Center for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
Christophe Menkes
Centre IRD, Nouméa, New Caledonia
LOCEAN Laboratory, IPSL, Sorbonne Universités (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, Paris, France
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Short summary
N2 fixation is recognized as one of the major sources of nitrogen in the ocean. Thus, N2 fixation sustains a significant part of the primary production (PP) by supplying the most common limiting nutrient for phytoplankton growth. From numerical simulations, the local maximums of Trichodesmium biomass in the Pacific are found around islands, explained by the iron fluxes from island sediments. We assessed that 15 % of the PP may be due to Trichodesmium in the low-nutrient, low-chlorophyll areas.
N2 fixation is recognized as one of the major sources of nitrogen in the ocean. Thus, N2...
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