Large sulfur isotope fractionation by bacterial sulfide oxidation

A sulfide-oxidizing microorganism, Desulfurivibrio alkaliphilus (DA), generates a consistent enrichment of sulfur-34 ((34)S) 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 (34)S e...

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Detalles Bibliográficos
Autores principales: Pellerin, André, Antler, Gilad, Holm, Simon Agner, Findlay, Alyssa J., Crockford, Peter W., Turchyn, Alexandra V., Jørgensen, Bo Barker, Finster, Kai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2019
Materias:
Research Articles
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6656534/
https://www.ncbi.nlm.nih.gov/pubmed/31355330
http://dx.doi.org/10.1126/sciadv.aaw1480
Descripción
Sumario:A sulfide-oxidizing microorganism, Desulfurivibrio alkaliphilus (DA), generates a consistent enrichment of sulfur-34 ((34)S) 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 (34)S 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 (34)S 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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