Articles | Volume 13, issue 9
https://doi.org/10.5194/bg-13-2653-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-13-2653-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
04 May 2016
Research article |
| 04 May 2016
Dynamics of N2 fixation and fate of diazotroph-derived nitrogen in a low-nutrient, low-chlorophyll ecosystem: results from the VAHINE mesocosm experiment (New Caledonia)
Sophie Bonnet
CORRESPONDING AUTHOR
IRD, Aix Marseille Université, CNRS/INSU, Université de Toulon, Mediterranean Institute of Oceanography (MIO) UM 110, 13288, Marseille, France
IRD, Aix Marseille Université, CNRS/INSU, Université de Toulon, Mediterranean Institute of Oceanography (MIO) UM 110, 101 Promenade R. Laroque, BPA5, 98848 Noumea CEDEX, New Caledonia
Hugo Berthelot
IRD, Aix Marseille Université, CNRS/INSU, Université de Toulon, Mediterranean Institute of Oceanography (MIO) UM 110, 13288, Marseille, France
Kendra Turk-Kubo
Ocean Sciences Department, University of California,
Santa Cruz, California, USA
Sarah Fawcett
Department of Geosciences, M45 Guyot Hall, Princeton
University, Princeton, New Jersey 08544, USA
Department of Oceanography, University of Cape Town,
Rondebosch, 7701, South Africa
Eyal Rahav
Mina and Everard Goodman Faculty of Life Sciences,
Bar-Ilan University, Ramat Gan, Israel
National Institute of Oceanography, Israel Oceanographic
and Limnological Research, Haifa, Israel
Stéphane L'Helguen
Université de Brest, CNRS/IRD, UMR6539, Laboratoire
des Sciences de l'Environnement Marin, OSU-IUEM, 29280 Plouzané,
France
Ilana Berman-Frank
Mina and Everard Goodman Faculty of Life Sciences,
Bar-Ilan University, Ramat Gan, Israel
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Short summary
N2 fixation rates were measured daily in ~ 50 m3 mesocosms deployed in New Caledonia to investigate the high-frequency dynamics of diazotrophy and the fate of diazotroph-derived nitrogen (DDN) oligotrophic ecosystems. ~ 10 % of UCYN-C from the water column were exported daily to the traps, representing as much as 22.4 ± 5.5 % of the total POC exported at the height of the UCYN-C bloom. 16 ± 6 % of the DDN was released to the dissolved pool and 21 ± 4 % was transferred to non-diazotrophic plankton.
N2 fixation rates were measured daily in ~ 50 m3 mesocosms deployed in New Caledonia to...
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