Large sulfur isotope fractionation by bacterial sulfide oxidation

André Pellerin; Gilad Antler; Simon Agner Holm; Alyssa J. Findlay; Peter W. Crockford; Alexandra V. Turchyn; Bo Barker Jørgensen; Kai Finster

doi:10.1126/sciadv.aaw1480

Large sulfur isotope fractionation by bacterial sulfide oxidation

André Pellerin, Gilad Antler, Simon Agner Holm, Alyssa J. Findlay, Peter W. Crockford, Alexandra V. Turchyn, Bo Barker Jørgensen, Kai Finster

Department of Earth and Environmental sciences

Research output: Contribution to journal › Article › peer-review

61 Scopus citations

Abstract

A sulfide-oxidizing microorganism, Desulfurivibrio alkaliphilus (DA), generates a consistent enrichment of sulfur-34 (³⁴S) in the produced sulfate of +12.5 per mil or greater. This observation challenges the general consensus that the microbial oxidation of sulfide does not result in large ³⁴S enrichments and suggests that sedimentary sulfides and sulfates may be influenced by metabolic activity associated with sulfide oxidation. Since the DA-type sulfide oxidation pathway is ubiquitous in sediments, in the modern environment, and throughout Earth history, the enrichments and depletions in ³⁴S in sediments may be the combined result of three microbial metabolisms: microbial sulfate reduction, the disproportionation of external sulfur intermediates, and microbial sulfide oxidation.

Original language	English
Article number	eaaw1480
Journal	Science advances
Volume	5
Issue number	7
DOIs	https://doi.org/10.1126/sciadv.aaw1480
State	Published - 24 Jul 2019

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title = "Large sulfur isotope fractionation by bacterial sulfide oxidation",

abstract = "A sulfide-oxidizing microorganism, Desulfurivibrio alkaliphilus (DA), generates a consistent enrichment of sulfur-34 (34S) in the produced sulfate of +12.5 per mil or greater. This observation challenges the general consensus that the microbial oxidation of sulfide does not result in large 34S enrichments and suggests that sedimentary sulfides and sulfates may be influenced by metabolic activity associated with sulfide oxidation. Since the DA-type sulfide oxidation pathway is ubiquitous in sediments, in the modern environment, and throughout Earth history, the enrichments and depletions in 34S in sediments may be the combined result of three microbial metabolisms: microbial sulfate reduction, the disproportionation of external sulfur intermediates, and microbial sulfide oxidation.",

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AU - Pellerin, André

AU - Antler, Gilad

AU - Holm, Simon Agner

AU - Findlay, Alyssa J.

AU - Crockford, Peter W.

AU - Turchyn, Alexandra V.

AU - Jørgensen, Bo Barker

AU - Finster, Kai

PY - 2019/7/24

Y1 - 2019/7/24

N2 - A sulfide-oxidizing microorganism, Desulfurivibrio alkaliphilus (DA), generates a consistent enrichment of sulfur-34 (34S) in the produced sulfate of +12.5 per mil or greater. This observation challenges the general consensus that the microbial oxidation of sulfide does not result in large 34S enrichments and suggests that sedimentary sulfides and sulfates may be influenced by metabolic activity associated with sulfide oxidation. Since the DA-type sulfide oxidation pathway is ubiquitous in sediments, in the modern environment, and throughout Earth history, the enrichments and depletions in 34S in sediments may be the combined result of three microbial metabolisms: microbial sulfate reduction, the disproportionation of external sulfur intermediates, and microbial sulfide oxidation.

AB - A sulfide-oxidizing microorganism, Desulfurivibrio alkaliphilus (DA), generates a consistent enrichment of sulfur-34 (34S) in the produced sulfate of +12.5 per mil or greater. This observation challenges the general consensus that the microbial oxidation of sulfide does not result in large 34S enrichments and suggests that sedimentary sulfides and sulfates may be influenced by metabolic activity associated with sulfide oxidation. Since the DA-type sulfide oxidation pathway is ubiquitous in sediments, in the modern environment, and throughout Earth history, the enrichments and depletions in 34S in sediments may be the combined result of three microbial metabolisms: microbial sulfate reduction, the disproportionation of external sulfur intermediates, and microbial sulfide oxidation.

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Large sulfur isotope fractionation by bacterial sulfide oxidation

Abstract

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