Biogeosciences
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Articles | Volume 22, issue 18
Articles | Volume 22, issue 18
https://doi.org/10.5194/bg-22-4885-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-4885-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 18
Research article
 | 
24 Sep 2025
Research article |  | 24 Sep 2025

A niche for diverse cable bacteria in continental margin sediments overlain by oxygen-deficient waters

Caroline P. Slomp, Martijn Hermans, Niels A. G. M. van Helmond, Silke Severmann, James McManus, Marit R. van Erk, and Sairah Malkin

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Latest update: 01 Oct 2025
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Short summary
Cable bacteria couple the oxidation of sulfide at depth in sediments with the reduction in oxygen, nitrate, or nitrite near the sediment surface, thereby preventing the release of toxic hydrogen sulfide to the overlying water. We show evidence for a diversity of cable bacteria in sediments from hypoxic and anoxic basins along the continental margin of California and Mexico. Cable bacteria activity in this setting is likely to be periodic and dependent on the supply of organic matter and/or oxygen.
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