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Ordination plots of pCCA results for PLFA fingerprints. Elevation, latitude, and year were used as covariables. The arrows represent the best 10 variables by automatic forward selection in CANOCO. Fatty acid groups (branched, saturated, cyclo, etc.) were included as supplementary variables and are not determinants of the sample ordination. UNSAT, unsaturated fatty acids; MUNSAT, monounsaturated fatty acids; SAT, saturated fatty acids; Eukaryot, eukaryote; SRB, sulfate-reducing bacteria.
