FIG. 4.

Oxidation of atmospheric methane by soil slurries supplemented with daily doses of methanol for 17 days and supplied with atmospheric methane (solid bars) or deprived of methane (open bars). A recovery period of 4 days followed the last methanol dose before methane oxidation rates were measured. The addition of 32.1 mg of CH₃OH g⁻¹ day⁻¹ corresponds to an initial CH₃OH concentration of 0.44 mM. Error bars correspond to 1 standard error (n = 3).