Articles | Volume 13, issue 14
Biogeosciences, 13, 4065–4080, 2016
https://doi.org/10.5194/bg-13-4065-2016
Biogeosciences, 13, 4065–4080, 2016
https://doi.org/10.5194/bg-13-4065-2016

Research article 18 Jul 2016

Research article | 18 Jul 2016

Nitrogen fixation in sediments along a depth transect through the Peruvian oxygen minimum zone

Jessica Gier et al.

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (Editor review) (30 Dec 2015) by Kirsten Küsel
AR by J. Gier on behalf of the Authors (04 Jan 2016)  Author's response    Manuscript
ED: Publish subject to minor revisions (Editor review) (15 Jan 2016) by Kirsten Küsel
AR by J. Gier on behalf of the Authors (09 Jun 2016)  Author's response    Manuscript
ED: Publish as is (23 Jun 2016) by Kirsten Küsel
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Short summary
Benthic nitrogen fixation and sulfate reduction were investigated in the Peruvian oxygen minimum zone. The data suggest a coupling of both activities to a large extent, but that also sulfide and organic matter availability are controlling the benthic diazotrophy in this area. The molecular analysis confirms the presence of heterotrophic diazotrophs. This work improves our understanding of N cycling in OMZ sediments and the understanding of N sources in the marine environment.
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