Tab. 3. Results of Principal Components Analysis (PCA), showing the loadings of environmental variables on the first two principal components and the percent of total variance explained by these components. Shaded values in bold represent values with correlation coefficients>0.60 and statistical significance (p> 0.05).
| Variables |
PC1 |
PC2 |
| T (°C) |
0.398 |
0.092 |
| pH |
0.153 |
0.346 |
| DO (mg/L) |
0.375 |
-0.136 |
| Conductivity (uS) |
0.003 |
0.052 |
| Width (m) |
0.418 |
-0.090 |
| Depth (cm) |
0.255 |
0.151 |
| Salinity (ppt) |
0.083 |
-0.195 |
| Water velocity (m/s) |
0.310 |
0.167 |
| Elevation |
-0.377 |
-0.063 |
| Sands (%) |
0.203 |
-0.437 |
| Rocks (%) |
-0.065 |
0.475 |
| Leaves (%) |
-0.205 |
0.042 |
| Logs (%) |
-0.160 |
0.449 |