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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: Environ Microbiol Rep. 2020 Aug 16;12(5):583–593. doi: 10.1111/1758-2229.12867

Fig. 1.

Fig. 1.

Consumption of Mn(III) in Lake Matano enrichments in the presence and absence of methane. Sediment-free cultures (transfer 4), from 335 days after the initial enrichment, were incubated for 45 days with 1 mM Mn(III) pyrophosphate as the sole electron acceptor. One set was incubated with Mn(III) and 2% O2. Initial bottle headspace contained 50% CH4 + 50% N2 (black circles), 50% CH4 + 48% N2 + 2% O2 (grey circles), 100% N2 (white circles) and 50% CH4 + 50% N2 heat-killed controls (black triangles). Error bars are standard deviations from duplicate experiments. Colour change from red to clear indicates Mn(III) reduction.