Acetogenesis in Deep Subseafloor Sediments of The Juan de Fuca Ridge Flank: A Synthesis of Geochemical, Thermodynamic, and Gene-based Evidence
Abstract
In deep subsurface sediments of the Juan de Fuca Ridge Flank, porewater acetate that is depleted in 13 C relative to sedimentary organic matter indicates an acetogenic component to total acetate production. Thermodynamic calculations indicate common fermentation products or lignin monomers as potential substrates for acetogenesis. The classic autotrophic reaction may contribute as well, provided that dihydrogen (H 2 ) concentrations are not drawn down to the thermodynamic thresholds of the energetically more favorable processes of sulfate reduction and methanogenesis. A high diversity of novel formyl tetrahydrofolate synthetase (fhs) genes throughout the upper half of the sediment column indicates the genetic potential for acetogenesis. Our results suggest that a substantial fraction of the acetate produced in marine sediment porewaters may derive from acetogenesis, in addition to the conventionally invoked sources fermentation and sulfate reduction.
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Sulfate reducers, acetogens and methanogens appear to be the most common inhabitants of ecosystems situated deep within the crust.
“Sulfate reducers, acetogens and methanogens appear to be the most common inhabitants of ecosystems situated deep within the crust [184–188].”
From Early bioenergetic evolution (2013) · cites this paper as [187]
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Self-citation
- Authors
- Lever, M. A., Heuer, V. B., Morono, Y., Masui, N., Schmidt, F., Alperin, M. J., Inagaki, F., Hinrichs, K.-U., & Teske, A.
- Affiliations
- University of North Carolina at Chapel Hill (US)
- University of Bremen (DE)
- Japan Agency for Marine-Earth Science and Technology (JP)
- ORCID
- Venue
- Geomicrobiology Journal
- Publisher
- Informa UK Limited
- Published
- 2010-02-26
- Volume
- 27
- Issue
- 2
- Pages
- 183-211
- ISSN
- 0149-0451 (ISSN-L)
- 1521-0529
- OpenAlex
- W1982075342
- Cited by
- 86
- References
- 265
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 1 · 2023: 5 · 2022: 1 · 2021: 4 · 2020: 5 · 2019: 9 · 2018: 3 · 2017: 6 · 2016: 8 · 2015: 6 · 2014: 8 · 2013: 7 · 2012: 7
- FWCI
- 7.23
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Geomicrobiology Journal (publishedVersion)
- Publication Database GFZ (GFZ German Research Centre for Geosciences) (submittedVersion)
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Methane Hydrates and Related Phenomena
- Physical Sciences › Environmental Science › Ecology › Microbial Community Ecology and Physiology
- Physical Sciences › Environmental Science › Environmental Engineering › Microbial Fuel Cells and Bioremediation
- Keywords
- acetogenesis, Juan de Fuca Ridge, lignin monomers, fermentation substrate, molecular hydrogen, sulfate reduction, methanogenesis, marine sediment geochemistry
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