Articles | Volume 13, issue 9
Biogeosciences, 13, 2653–2673, 2016
https://doi.org/10.5194/bg-13-2653-2016

Special issue: Biogeochemical and biological response to a diazotroph bloom...

Biogeosciences, 13, 2653–2673, 2016
https://doi.org/10.5194/bg-13-2653-2016

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 et al.

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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.
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