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Principal component analysis (PCA) of binary microarray data. Sample means from different sampling times in days (d) are showed [original 0 days = original inactive moss (n = 1), original 28 days = original moss transplanted back to the original site (n = 3), immigrant = original moss transplanted to the active flark sites (n = 6), native = native mosses of the active flark sites (n = 6)]. The first and second PCA axes explain 25 and 11% of the compositional variation, respectively.
