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Carbon fixation from mineral carbonates

Abstract Photoautotrophs assimilate oxidized carbon obtained from one of two sources: dissolved or atmospheric. Despite its size, the pool of lithospheric carbonate is not known to be a direct source for autotrophy. Yet, the mechanism that euendolithic cyanobacteria use to excavate solid carbonates suggests that minerals could directly supply CO[subscript 2] for autotrophy. Here, we use stable isotopes and NanoSIMS to show that the cyanobacterium Mastigocoleus testarum derives most of its carbon from the mineral it excavates, growing preferentially as an endolith when lacking dissolved CO[subscript 2]. Furthermore, natural endolithic communities from intertidal marine carbonate outcrops present carbon isotopic signatures consistent with mineral-sour... (more)
Created Date 2017-10-18
Contributor Guida, Brandon (ASU author) / Bose, Maitrayee (ASU author) / Garcia-Pichel, Ferran (ASU author) / College of Liberal Arts and Sciences / School of Life Sciences / School of Earth and Space Exploration / Biodesign Institute / Fundamental and Applied Microbiomics
Type Text
Extent 6 pages
Language English
Identifier DOI: 10.1038/s41467-017-00703-4 / ISSN: 2041-1723
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Citation Guida, B. S., Bose, M., & Garcia-Pichel, F. (2017). Carbon fixation from mineral carbonates. Nature Communications, 8(1). doi:10.1038/s41467-017-00703-4
Note The final version of this article, as published in Nature Communications, can be viewed online at:
Collaborating Institutions ASU Library
Additional Formats MODS / OAI Dublin Core / RIS

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