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. 2014 Sep 12;9(3):746–759. doi: 10.1038/ismej.2014.148

Figure 1.

Figure 1

(a) Pore-water profiles of pH, Eh, acetate and CH4 concentrations in mofette (circles) and reference (triangles) soils in June 2011 (open symbols) and August 2012 (filled symbols). (b) Potential H2-CO2-derived acetate and CH4 formation in the mofette soil (filled bars) and the reference soil (empty bars) determined in April 2011 (mean±s.d., N=3). Also shown are estimated recoveries of reducing equivalents from consumed H2 ([H]H2) by H2-CO2-dependent acetogenesis (H2:acetate=4:1) and methanogenesis (H2:CH4=8:1), as well as the formations of acetate and CH4 without addition of H2 (striped bars). B.D.=below detection.