Articles | Volume 13, issue 11
Biogeosciences, 13, 3187–3202, 2016
https://doi.org/10.5194/bg-13-3187-2016

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

Biogeosciences, 13, 3187–3202, 2016
https://doi.org/10.5194/bg-13-3187-2016

Research article 02 Jun 2016

Research article | 02 Jun 2016

Heterotrophic bacterial production and metabolic balance during the VAHINE mesocosm experiment in the New Caledonia lagoon

France Van Wambeke et al.

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Short summary
The phytoplankton is at the base of the plankton food web in large parts of oceanic "deserts" such as the South Pacific Ocean, where nitrogen sources limit activity. Mesocosms were fertilized with phosphorus to stimulate diazotrophy (atmospheric N2 fixation). Mostly diazotroph-derived nitrogen fuelled the heterotrophic bacterial community through indirect processes generating dissolved organic matter and detritus, such as mortality, lysis and grazing of both diazotrophs and non-diazotrophs.
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