Mean (± standard deviation) surface soil (0–40 cm) chemistry (total nitrogen, total carbon, total phosphorus, phenolic compounds, extractable nitrate/nitrite, extractable ammonia/ammonium, water pH, salt pH) from three sites at the Los Amigos peat swamp in Madre de Dios, Peru.

Letters (a,b) refer to Tukey groupings and bold indicates where Tukey’s honest significant differences were found between sites. The data used to generate these values can be found in S2 Table.