Fig. 2: Methane consumption and resulting stable isotope fractionation in incubated canal waters.

A Across incubated waters, δ13C-CH4 increased as the percent of initial CH4 consumed increased. Each data point shows the mean change over ~50 hours of incubation ± standard error of replicates (Table S1). B Histogram of αox values calculated from incubation data. Source data are provided as a Source Data file.