Table 2. Component matrix showing correlation between the Varimax rotated PCs and the original input variables.
| Abiotic Variables | PC1 | PC2 | PC3 | PC4 | PC5 | PC6 |
|---|---|---|---|---|---|---|
| Depth | −0.652 | — | — | — | 0.673 | — |
| Slope | — | — | — | 0.958 | — | — |
| Terrain Ruggedness Index | — | — | — | 0.959 | — | — |
| Curvature | — | — | — | — | — | 0.807 |
| Topographic Position Index | — | — | — | — | — | 0.812 |
| Primary Productivity | — | — | — | — | — | — |
| Summer Seabed Temperature | — | — | — | — | 0.926 | — |
| Summer Seabed Salinity | 0.951 | — | — | — | — | — |
| Summer Seabed Current U | — | 0.875 | — | — | — | — |
| Summer Seabed Current V | — | — | 0.968 | — | — | — |
| Summer Seabed Current Magnitude | — | 0.861 | — | — | — | — |
| Winter Seabed Temperature | — | — | — | — | 0.970 | — |
| Winter Seabed Salinity | 0.933 | — | — | — | — | — |
| Winter Seabed Current U | — | 0.882 | — | — | — | — |
| Winter Seabed Current V | — | — | 0.974 | — | — | — |
| Winter Seabed Current Magnitude | — | 0.861 | — | — | — | — |
| Seabed Temperature Range | −0.763 | — | — | — | — | — |
| Variance Explained (%) | 16.60% | 18.40% | 11.70% | 11.80% | 14.80% | 7.70% |
| Cumulative Variance (%) | 16.60% | 35.00% | 46.70% | 58.50% | 73.30% | 81.00% |
| Eigenvalues | 3.7053 | 3.3623 | 2.0678 | 1.8257 | 1.5012 | 1.3138 |
High factor loads (r < −0.6 or r > 0.6) are highlighted in bold; Low factor loads (r < −0.3 or r > 0.3) are omitted.