Articles | Volume 14, issue 22
https://doi.org/10.5194/bg-14-5171-2017
https://doi.org/10.5194/bg-14-5171-2017
Research article
 | 
20 Nov 2017
Research article |  | 20 Nov 2017

Ferrihydrite-associated organic matter (OM) stimulates reduction by Shewanella oneidensis MR-1 and a complex microbial consortia

Rebecca Elizabeth Cooper, Karin Eusterhues, Carl-Eric Wegner, Kai Uwe Totsche, and Kirsten Küsel

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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (Editor review) (11 Sep 2017) by Denise Akob
AR by Rebecca Cooper on behalf of the Authors (24 Sep 2017)  Author's response   Manuscript 
ED: Publish as is (02 Oct 2017) by Denise Akob
AR by Rebecca Cooper on behalf of the Authors (11 Oct 2017)
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Short summary
In this study we show increasing organic matter (OM) content on ferrihydrite surfaces enhances Fe reduction by the model Fe reducer S. oneidensis and a microbial consortia extracted from peat. Similarities in reduction rates between S. oneidensis and the consortia suggest electron shuttling dominates in OM-rich soils. Community profile analyses showed enrichment of fermenters with pure ferrihydrite, whereas OM–mineral complexes favored enrichment of Fe-reducing Desulfobacteria and Pelosinus sp.
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