Fig. 1: Concurrent methanogenesis and crystalline iron reduction during benzoate degradation in sediment slurry incubations. | The ISME Journal

Fig. 1: Concurrent methanogenesis and crystalline iron reduction during benzoate degradation in sediment slurry incubations.

From: Crystalline iron oxides stimulate methanogenic benzoate degradation in marine sediment-derived enrichment cultures

Fig. 1

a Enhancement of methanogenesis by (semi)conductive crystalline iron minerals (hematite and magnetite) and inhibition of methanogenesis by nonconductive, poorly crystalline iron lepidocrocite, n = 3, error bars are 1 s.d. b Concurrent reduction of crystalline iron(III) minerals during phase of active methanogenesis (after day 60). Higher concentrations of dissolved Fe2+ were observed in the presence of hematite and magnetite as compared to controls with benzoate only. c Time course of benzoate degradation in incubations, obtained by measuring the decrease in benzoic acid concentrations. d Bacteria and archaea communities enriched during the sediment slurry incubations. Two types of color panels were used for the plots to differentiate communities stimulated during the incubation and presented on either order, family, or genus level from the communities whose relative abundance did not increase presented on phylum or class level.

Back to article page