Articles | Volume 19, issue 1
Biogeosciences, 19, 201–221, 2022
https://doi.org/10.5194/bg-19-201-2022
Biogeosciences, 19, 201–221, 2022
https://doi.org/10.5194/bg-19-201-2022

Research article 13 Jan 2022

Research article | 13 Jan 2022

Bacteriohopanetetrol-x: constraining its application as a lipid biomarker for marine anammox using the water column oxygen gradient of the Benguela upwelling system

Zoë R. van Kemenade et al.

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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on bg-2021-257', Anonymous Referee #1, 27 Oct 2021
    • AC1: 'Reply on RC1', Zoe van Kemenade, 20 Nov 2021
  • RC2: 'Comment on bg-2021-257', Anonymous Referee #2, 09 Nov 2021
    • AC2: 'Reply on RC2', Zoe van Kemenade, 20 Nov 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (21 Nov 2021) by Sebastian Naeher
AR by Zoe van Kemenade on behalf of the Authors (01 Dec 2021)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (05 Dec 2021) by Sebastian Naeher
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Short summary
Anaerobic ammonium oxidation (anammox) is an important nitrogen-removal process in the ocean. We assess the distribution of bacteriohopanetetrol-x (BHT-x), used to trace past anammox, along a redox gradient in the water column of the Benguela upwelling system. BHT-x / BHT ratios of >0.18 correspond to the presence of living anammox bacteria and oxygen levels <50 μmol L−1. This allows for a more robust application of BHT-x to trace past marine anammox and deoxygenation in dynamic marine systems.
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