Articles | Volume 18, issue 12
Biogeosciences, 18, 3689–3700, 2021
https://doi.org/10.5194/bg-18-3689-2021
Biogeosciences, 18, 3689–3700, 2021
https://doi.org/10.5194/bg-18-3689-2021

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 et al.

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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.
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