Reviews and syntheses: Heterotrophic fixation of inorganic carbon – significant but invisible flux in environmental carbon cycling

Braun, Alexander; Spona-Friedl, Marina; Avramov, Maria; Elsner, Martin; Baltar, Federico; Reinthaler, Thomas; Herndl, Gerhard J.; Griebler, Christian

doi:https://doi.org/10.5194/bg-18-3689-2021

Articles | Volume 18, issue 12

https://doi.org/10.5194/bg-18-3689-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-18-3689-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 12

Reviews and syntheses

|

21 Jun 2021

Reviews and syntheses |

| 21 Jun 2021

Reviews and syntheses: Heterotrophic fixation of inorganic carbon – significant but invisible flux in environmental carbon cycling

Alexander Braun, Marina Spona-Friedl, Maria Avramov, Martin Elsner, Federico Baltar, Thomas Reinthaler, Gerhard J. Herndl, and Christian Griebler

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Final revised paper (published on 21 Jun 2021)
Supplement to the final revised paper
Preprint (discussion started on 17 Dec 2020)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

- Printer-friendly version

- Supplement

RC1: 'Review of Heterotrophic fixation of inorganic carbon', Anonymous Referee #1, 03 Jan 2021
- AC1: 'Reply on RC1', Christian Griebler, 26 Apr 2021
- AC4: 'Reply on RC1', Christian Griebler, 26 Apr 2021
RC2: 'Review of Heterotrophic fixation of inorganic carbon', Anonymous Referee #2, 12 Feb 2021
- AC2: 'Reply on RC2', Christian Griebler, 26 Apr 2021
- AC3: 'Reply on RC2', Christian Griebler, 26 Apr 2021

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Reconsider after major revisions (03 May 2021) by Steven Bouillon

AR by Christian Griebler on behalf of the Authors (03 May 2021) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (03 May 2021) by Steven Bouillon

RR by Anonymous Referee #2 (04 May 2021)

ED: Publish subject to technical corrections (17 May 2021) by Steven Bouillon

AR by Christian Griebler on behalf of the Authors (26 May 2021) Author's response Manuscript

Short summary

It is known that CO₂ fixation by photoautotrophic organisms is the major sink from the atmosphere. While biologists are aware that CO₂ fixation also occurs in heterotrophic organisms, this route of inorganic carbon, and its quantitative role, is hardly recognized in biogeochemistry. We demonstrate that a considerable amount of CO₂ is fixed annually through anaplerotic reactions in heterotrophic organisms, and a significant quantity of inorganic carbon is temporally sequestered in biomass.