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Fig. 1. Plot of the first and second principal components (PCs) extracted from principal components analysis (PCA) of the phospholipid fatty acid (PLFA) data from all soil samples. HF = Humuula (squares), Hawaii forest; HC90 = Humuula 90-yr-old sugarcane field; KF = Kalopa (diamonds), Hawaii forest; KP = Kalopa pasture; KC50 = Kalopa 50-yr-old sugarcane field; BF = Brazil (circles) forest; BC = Brazil sugarcane fields; EF = Ecuador (triangles) forest; EC = Ecuador sugarcane fields; EP = Ecuador pastures; G+ = Gram positive bacteria; G- = Gram negative bacteria; B = bacteria; F = fungi; P = protozoa; and A = actinomycetes. Symbol labels are: D = deeper sample; S = shallower sample; A and B in front of the depth designation correspond to the two replicates for the Ecuador ecosystems (triangles); and numbers in front of the depth designations indicate the ages of the Brazil sugarcane fields (open circles). Symbol fills: forest = black; pasture = gray; and sugarcane = open.
