Triple sulfur isotope relationships during sulfate-driven anaerobic oxidation of methane
نویسندگان
چکیده
منابع مشابه
Iron oxides stimulate sulfate-driven anaerobic methane oxidation in seeps.
Seep sediments are dominated by intensive microbial sulfate reduction coupled to the anaerobic oxidation of methane (AOM). Through geochemical measurements of incubation experiments with methane seep sediments collected from Hydrate Ridge, we provide insight into the role of iron oxides in sulfate-driven AOM. Seep sediments incubated with (13)C-labeled methane showed co-occurring sulfate reduct...
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Sulfur isotope signatures provide key information for the study of microbial activity in modern systems and the evolution of the Earth surface redox system. Microbial sulfate reducers shift sulfur isotope distributions by discriminating against heavier isotopes. This discrimination is strain-specific and often suppressed at sulfate concentrations in the lower micromolar range that are typical t...
متن کاملCorrection for “ Carbon and sulfur back fl ux during anaerobic microbial oxidation of methane and coupled sulfate
MICROBIOLOGY Correction for “Carbon and sulfur back flux during anaerobic microbial oxidation of methane and coupled sulfate reduction,” by Thomas Holler, Gunter Wegener, Helge Niemann, Christian Deusner, Timothy G. Ferdelman, Antje Boetius, Benjamin Brunner, and Friedrich Widdel, which appeared in issue 52, December 27, 2011, of Proc Natl Acad Sci USA (108:E1484–E1490; first published December...
متن کاملPNAS Plus Significance Statements Iron oxides stimulate sulfate-driven anaerobic methane oxidation in seeps
Anaerobic oxidation of methane (AOM) coupled to sulfate reduction has been shown to consume up to 90% of the greenhouse gas methane produced within the subseafloor environment; however, the mechanism of this process has remained enigmatic. Here, we provide geochemical evidence based on sulfur, oxygen, and carbon isotopes for the involvement of iron oxides in sulfate-driven AOM inmethane seeps. ...
متن کاملPhysiology of Multiple Sulfur Isotope Fractionation during Microbial Sulfate Reduction
Microbial sulfate reduction (MSR) utilizes sulfate as an electron acceptor and produces sulfide that is depleted in heavy isotopes of sulfur relative to starting sulfate. The fractionation of S-isotopes is commonly used to trace the biogeochemical cycling of sulfur in nature, but a mechanistic understanding of factors that control the range of isotope fractionation is still lacking. This thesis...
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 2018
ISSN: 0012-821X
DOI: 10.1016/j.epsl.2018.09.036