Table 2 Eigenvectors from principal component analysis (PCA) of habitat variables
PCA axis | PC1 | PC2 | PC3 | PC4 |
|---|---|---|---|---|
Character | More trees | Heavy canopy | Open | Shaded |
Eigenvalue | 3.37 | 1.44 | 1.09 | 0.77 |
% variation explained | 42.08 | 17.97 | 13.63 | 9.59 |
Eigenvectors: NT study site | Â | Â | Â | Â |
Bare ground (%) | -0.006 | 0.01 | 0.0001 | 0.003 |
Grass cover (%) | 0.001 | -0.02 | -0.003 | 0.002 |
Leaf-litter cover (%) | 0.006 | 0.002 | 0.001 | -0.005 |
Leaf-litter depth (mm) | 0.03 | 0.01 | 0.005 | -0.03 |
Understory cover (%) | 0.007 | 0.002 | 0.04 | -0.01 |
Canopy cover (%) | 0.01 | 0.006 | -0.02 | 0.01 |
Number of trees | 0.12 | -0.10 | -0.26 | -0.12 |
Number of shrubs | 0.03 | -0.008 | 0.04 | 0.18 |
Eigenvalue | 2.73 | 1.26 | 1.86 | 1.01 |
% variation explained | 34.12 | 15.74 | 14.83 | 12.67 |
Eigenvectors: WA study site | Â | Â | Â | Â |
Bare ground (%) | -0.003 | 0.03 | 0.003 | 0.02 |
Grass cover (%) | -0.007 | -0.007 | -0.007 | 0.001 |
Leaf-litter cover (%) | 0.007 | -0.001 | -0.004 | -0.004 |
Leaf-litter depth (mm) | -0.001 | -0.002 | 0.04 | -0.008 |
Understory cover (%) | 0.005 | 0.01 | -0.006 | -0.02 |
Canopy cover (%) | 0.009 | 0.002 | -0.004 | 0.02 |
Number of trees | 0.20 | -0.22 | 0.08 | 0.21 |
Number of shrubs | 0.04 | -0.03 | 0.02 | -0.02 |