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. 2016 Jun 14;4:e2091. doi: 10.7717/peerj.2091

Table 1. Summary of the permutation importance (PI) and percentage contribution (PC; %) for each plant type.

The values (plus or minus standard errors) represent average PI, and the values inside the parentheses represent the percentage of the total plant species impacted based on the PC results. The codes of variables were the same as Table S2.

Variables Tree Shrub Herb Fern
BLD 0.72 ± 0.13(0) 0.20 ± 0.18(0) 0.76 ± 0.19(0) 0.95 ± 0.74(0)
CEC 0.60 ± 0.19(0) 0.30 ± 0.27(0) 0.50 ± 0.23(0) 0.51 ± 0.30(0)
CLYPPT 1.35 ± 0.37(0) 3.50 ± 2.13(0) 2.24 ± 1.07(0) 1.62 ± 0.87(0)
CRFVOL 0.69 ± 0.16(0) 0.49 ± 0.28(0) 0.97 ± 0.33(0) 1.33 ± 0.73(0)
OCSTHA 1.07 ± 0.31(2) 0.81 ± 0.55(0) 0.72 ± 0.25(0) 1.41 ± 0.45(0)
PHIHOX 4.72 ± 1.18(9) 16.65 ± 6.68(50) 2.37 ± 1.37(0) 16.82 ± 10.10(25)
SLTPPT 0.36 ± 0.09(0) 0.23 ± 0.17(0) 2.93 ± 1.68(0) 4.36 ± 3.77(0)
SNDPPT 0.56 ± 0.13(0) 0.25 ± 0.17(0) 0.98 ± 0.37(0) 0.25 ± 0.24(0)
Aspect 0.58 ± 0.10(0) 0.41 ± 0.19(0) 0.82 ± 0.31(0) 1.44 ± 0.69(0)
Slope 2.50 ± 0.70(14) 1.36 ± 0.66(0) 2.56 ± 1.07(16) 3.95 ± 0.95(0)
Globcover 1.14 ± 0.21(0) 2.28 ± 2.00(0) 0.72 ± 0.28(0) 0.88 ± 0.45(0)
Bio1 24.27 ± 3.13(41) 5.15 ± 2.42(33) 22.52 ± 5.74(25) 19.32 ± 8.42(38)
Bio2 9.77 ± 1.99(39) 8.88 ± 7.76(33) 2.63 ± 1.42(25) 18.60 ± 7.86(38)
Bio3 7.75 ± 1.39(5) 2.72 ± 1.61(0) 12.50 ± 3.31(33) 0.71 ± 0.43(0)
Bio4 18.42 ± 3.02(16) 23.57 ± 13.69(33) 20.03 ± 4.25(42) 8.21 ± 3.98(0)
Bio12 11.60 ± 2.04(71) 15.99 ± 13.29(33) 11.60 ± 4.01(42) 17.37 ± 6.76(63)
Bio15 13.90 ± 2.86(18) 17.21 ± 9.38(33) 15.15 ± 4.13(8) 2.26 ± 0.45(0)