FIG. 2.
Effects of supplemental formate (A and B) or ethanol (C and D) on the production of CH4 (A and C), H2 (B and D), and CO2 (B and D) in bog peat microcosms. Solid symbols indicate amended microcosms; open symbols indicate controls (unamended); ⧫, ◊, formate; ▪, □, CH4; ▾, ▿, ethanol; •, ○, H2; ▴, ▵, CO2. A detailed view of the production of CH4 during the first 3 days is shown in the insets (A and C).