Files in this Data Supplement:
OTU accumulation curves for three land uses in the Amazon (Fig. SF1), nonmetric multidimensional scaling representation of the nifH gene sequence composition based on Bray-Curtis indices (Fig. SF2), copy numbers of the nifH gene per gram of soil determined for three different land use systems in the Amazon (Fig. SF3), sampling site coordinates and soil physicochemical characteristics for three land use systems in the Amazon (Table ST1), and OPUs and the closest matched sequences obtained through NCBI BlastP search of few randomly selected nifH amino acid sequences from each OPU (Table ST2).
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