Articles | Volume 13, issue 17
https://doi.org/10.5194/bg-13-5103-2016
https://doi.org/10.5194/bg-13-5103-2016
Research article
 | 
14 Sep 2016
Research article |  | 14 Sep 2016

Biogeochemical fluxes and fate of diazotroph-derived nitrogen in the food web after a phosphate enrichment: modeling of the VAHINE mesocosms experiment

Audrey Gimenez, Melika Baklouti, Sophie Bonnet, and Thierry Moutin

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Cited articles

Alekseenko, E., Raybaud, V., Espinasse, B., Carlotti, F., Queguiner, B., Thouvenin, B., Garreau, P., and Baklouti, M.: Seasonal dynamics and stoichiometry of the planktonic community in the NW Mediterranean Sea; a 3-D modeling approach, Ocean Dynam., 64, 179–207, 2014.
Baklouti, M., Faure, V., Pawlowski, L., and Sciandra, A.: Investigation and sensitivity analysis of a mechanistic phytoplankton model implemented in a new modular numerical tool (Eco3M) dedicated to biogeochemical modelling, Prog. Oceanogr., 71, 34–58, https://doi.org/10.1016/j.pocean.2006.05.003, 2006.
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Benavides, M., Bronk, D. A., Agawin, N. S. R., Pérez-Hernández, M. D., Hernández-Guerra, A., and Arstegui, J.: Longitudinal variability of size-fractionated N2 fixation and DON release rates along 24.5° N in the subtropical North Atlantic: N2 Fixation in the North Atlantic, J. Geophys. Res.-Oceans, 118, 3406–3415, https://doi.org/10.1002/jgrc.20253, 2013b.
Bergman, B. and Carpenter, E. J.: Nitrogenase confined to randomly distributed trichomes in the marine cyanobacterium Trichodesmium thiebautii, J. Phycol., 27, 158–165, https://doi.org/10.1111/j.0022-3646.1991.00158.x, 1991.
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Short summary
In the context of the VAHINE mesocosm experiment in the Nouméa lagoon (New Caledonia), a 1-D vertical biogeochemical mechanistic model was used together with the in situ experiment to complement our comprehension of the planktonic ecosystem dynamics and the main biogeochemical carbon, nitrogen and phosphate fluxes. The model also showed the fate of fixed N2 by providing, over time, the proportion of diazotroph-derived nitrogen (DDN) in each compartment (mineral and organic) of the model.
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