Tukey’s boxplots of methane emissions data from three sites at the Los Amigos peat swamp in Madre de Dios, Peru.

Whiskers extend to data within 1.5 of intra-quartile range; no outliers were removed. Letters correspond to results of Tukey’s honest significant differences test at α = 0.05. The data used to generate this figure can be found in S1 Table.