| Summary: | van Krevelen diagrams (H/C vs O/C ratios) of FTICRMS identified compounds for each site/depth: shallow collapsed palsa (panel a), shallow bog (panel b), shallow fen (panel c), deep collapsed palsa (panel d), and deep bog (panel e). Circles indicate compounds that are unique to the field samples for each site/depth. Triangles indicate compounds that are unique to the incubation samples for each site/depth. Venn diagrams to the right of each graph indicate the total number of compounds in the field, in the incubations, and the number of compounds that are found in both for each site/depth. The percentage indicates the percent of compounds from the field that were also found in the incubations. Panel (f) contains venn diagrams illustrating the number of samples in the shallow and deep field samples, as well as the percent of shallow field compounds that were also observed in the deep samples for each site/depth.
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