Fig. 4From: Microbial nitrogen fixation and methane oxidation are strongly enhanced by light in Sphagnum mossesPlot showing the average CH4 oxidation rates measured as 13C–CH4 incorporation at the end of the experiment, displayed per fertilization treatment. Incubations were performed either in the dark (dark blue) or in the light (light blue). Error bars indicate SEM and light grey dots show raw dataBack to article page