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Graphics for inear mixed-effects models (LMMs). Only the LMMs that indicated significant differences (P < 0.05) are shown. (A) LMM of tree trait PC1 in the historical climatic centre–periphery approach and (B) LMM of leaf trait PC2 in the geographical centre–periphery approach. GC, geographical centre; GP, geographical periphery; HC, historical centre; HP, historical periphery.
