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Table 2 Vector analysis of all environmental variables and diversity indices for TNMDS and PNMDS ordinations (Fig. 3a, b)

From: Taxonomic and phylogenetic composition show biotic resistance to exotic invasion in acid seep springs

  TNMDS PNMDS
Variable Mean Standard error r2 p value Mean Standard error r2 p value
June soil moisture (%) 24.74 2.19 0.81 0.01 24.74 2.19 0.74 0.01
July soil moisture (%) 22.64 2.01 0.76 0.01 22.64 2.01 0.63 0.03
August soil moisture (%) 32.24 2.15 0.7 0.02 32.24 2.15 0.64 0.04
Canopy cover (densiometer, %) 60.26 6.15 0.58 0.05 60.26 6.15 0.53 0.03
Relative photosynthetically active radiation 0.51 0.03 0.26 0.36 0.51 0.03 0.32 0.25
Soil pH 5.4 0.13 0.48 0.11 5.4 0.13 0.28 0.31
Soil conductivity (mS/m) 37.87 8.12 0.15 0.59 37.87 8.12 0.03 0.9
Slope (°) 2.7 0.56 0.33 0.28 2.7 0.56 0.19 0.49
Species richness (S) 58.1 4.67 0.12 0.66 58.1 4.67 0.41 0.15
Shannon-Weiner Index (H′) 1.25 0.03 0.37 0.2 1.25 0.03 0.13 0.6
Nearest Relatedness Index (NRI) -0.65 0.08 0.22 0.39 -0.65 0.08 0.64 0.04
Nearest Taxon Index (NTI) 0.43 0.05 0.66 0.03 0.43 0.05 0.19 0.49
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