Table 6.
Principal components for the relatedness of eight root morphological and chemical traits and root order (order 1–3) with the axes 1–4 of a PCA covering all six species (in brackets: cumulative fit values R2).
| Variables | Axis1 | Axis2 | Axis3 | Axis4 |
|---|---|---|---|---|
| EV | 0.738 | 0.133 | 0.073 | 0.039 |
| Root branching order | −0.944 (0.890) | 0.164 (0.917) | −0.044 (0.919) | 0.206 (0.962) |
| SRL (m g−1) | 0.922 (0.850) | −0.207 (0.894) | −0.118 (0.908) | 0.284 (0.988) |
| SRA (cm2 g−1) | 0.966 (0.933) | 0 (0.933) | −0.041 (0.935) | 0.217 (0.982) |
| RTD (g cm−3) | −0.628 (0.394) | −0.697 (0.880) | 0.334 (0.992) | 0.090 (1.000) |
| N concentration (mg g−1) | 0.777 (0.604) | 0.310 (0.700) | 0.545 (0.997) | −0.015 (0.997) |
| Mean diameter (mm) | −0.870 (0.756) | 0.383 (0.903) | 0.123 (0.918) | 0.241 (0.976) |
The eigenvalues of the axes are given in the second row. The closest correlations of the components with the respective axis are given in bold print.