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dc.contributor.authorBray, M. S.
dc.contributor.authorWu, J.
dc.contributor.authorReed, B. C.
dc.contributor.authorKretz, C. B.
dc.contributor.authorBelli, K. M.
dc.contributor.authorSimister, R. L.
dc.contributor.authorHenny, C.
dc.contributor.authorStewart, F. J.
dc.contributor.authorDiChristina, T. J.
dc.contributor.authorBrandes, J. A.
dc.contributor.authorFowle, D. A.
dc.contributor.authorCrowe, S. A.
dc.contributor.authorGlass, J. B.
dc.date.accessioned2022-02-03T23:22:54Z
dc.date.available2022-02-03T23:22:54Z
dc.date.issued2017-04-17
dc.identifier.citationBray, MS, Wu, J, Reed, BC, et al. Shifting microbial communities sustain multiyear iron reduction and methanogenesis in ferruginous sediment incubations. Geobiology. 2017; 15: 678– 689. https://doi.org/10.1111/gbi.12239en_US
dc.identifier.urihttp://hdl.handle.net/1808/32488
dc.descriptionThis is the peer reviewed version of the following article: Bray, MS, Wu, J, Reed, BC, et al. Shifting microbial communities sustain multiyear iron reduction and methanogenesis in ferruginous sediment incubations. Geobiology. 2017; 15: 678– 689. https://doi.org/10.1111/gbi.12239, which has been published in final form at https://doi.org/10.1111/gbi.12239. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.en_US
dc.description.abstractReactive Fe(III) minerals can influence methane (CH4) emissions by inhibiting microbial methanogenesis or by stimulating anaerobic CH4 oxidation. The balance between Fe(III) reduction, methanogenesis, and CH4 oxidation in ferruginous Archean and Paleoproterozoic oceans would have controlled CH4 fluxes to the atmosphere, thereby regulating the capacity for CH4 to warm the early Earth under the Faint Young Sun. We studied CH4 and Fe cycling in anoxic incubations of ferruginous sediment from the ancient ocean analogue Lake Matano, Indonesia, over three successive transfers (500 days in total). Iron reduction, methanogenesis, CH4 oxidation, and microbial taxonomy were monitored in treatments amended with ferrihydrite or goethite. After three dilutions, Fe(III) reduction persisted only in bottles with ferrihydrite. Enhanced CH4 production was observed in the presence of goethite, highlighting the potential for reactive Fe(III) oxides to inhibit methanogenesis. Supplementing the media with hydrogen, nickel and selenium did not stimulate methanogenesis. There was limited evidence for Fe(III)-dependent CH4 oxidation, although some incubations displayed CH4-stimulated Fe(III) reduction. 16S rRNA profiles continuously changed over the course of enrichment, with ultimate dominance of unclassified members of the order Desulfuromonadales in all treatments. Microbial diversity decreased markedly over the course of incubation, with subtle differences between ferrihydrite and goethite amendments. These results suggest that Fe(III) oxide mineralogy and availability of electron donors could have led to spatial separation of Fe(III)-reducing and methanogenic microbial communities in ferruginous marine sediments, potentially explaining the persistence of CH4 as a greenhouse gas throughout the first half of Earth history.en_US
dc.publisherWileyen_US
dc.rights© 2017 John Wiley & Sons Ltd.en_US
dc.titleShifting microbial communities sustain multiyear iron reduction and methanogenesis in ferruginous sediment incubationsen_US
dc.typeArticleen_US
kusw.kuauthorFowle, D. A.
kusw.kudepartmentGeologyen_US
dc.identifier.doi10.1111/gbi.12239en_US
kusw.oaversionScholarly/refereed, author accepted manuscripten_US
kusw.oapolicyThis item meets KU Open Access policy criteria.en_US
dc.identifier.pmidPMC7780294en_US
dc.rights.accessrightsopenAccessen_US


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