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(A) Principle component analysis (PCA) and (B) heatmap cluster analysis of the normalized soil elemental compositions and environmental attribute data. The values of PC1 and 2 are percentages of total variations that can be attributed to the corresponding axis. T, temperature; TOC, total organic carbon; MS, moss species amount; LS, lichen species amount; DAC, hairgrass (Deschampsia antarctica) coverage; and VC, total vegetation coverage.
