Variable | Stream sites | Principal components | ||||||
---|---|---|---|---|---|---|---|---|
Min | Max | Mean ± SE | PC-1 | PC-2 | PC-3 | PC-4 | PC-5 | |
Altitude (m) | 159.00 | 1813.00 | 891.40 ± 30.1 | −0.751** | 0.268** | 0.522** | 0.224** | 0.049 |
Temperature (°C) | 14.40 | 28.40 | 25.30 ± 0.17 | 0.636** | −0.230** | −0.622** | −0.285** | −0.059 |
Width (m) | 0.12 | 7.90 | 2.95 ± 0.11 | 0.692** | 0.322** | −0.132** | 0.044 | 0.037 |
Depth (m) | 0.02 | 0.85 | 0.54 ± 0.005 | 0.616** | 0.171 | 0.34 | 0.034 | 0.124 |
Velocity (m/s) | 0.16 | 1.03 | 0.42 ± 0.009 | 0.416** | 0.544** | −0.217** | 0.115 | 0.360** |
Conductivity (mS/cm) | 0.01 | 0.15 | 3.48 ± 0.001 | −0.297** | 0.162 | −0.327** | 0.001 | 0.328** |
Dissolved oxygen (mg/l) | 1.27 | 17.20 | 15.77 ± 0.14 | 0.148 | 0.336** | −0.051 | 0.363** | −0.576** |
pH | 4.32 | 8.53 | 5.20 ± 0.04 | 0.036 | −0.080 | −0.337** | 0.739** | −0.155 |
Discharge (m3/s) | 0.002 | 1.56 | 2.23 ± 0.01 | 0.786** | 0.376** | −0.208** | 0.049 | 0.137 |
Canopy cover | open | complete | 2a | 0.213** | −0.718** | 0.175 | 0.315** | 0.306** |
Riparian | open | forest | 2a | 0.400** | −0.763** | 0.174 | 0.122 | −0.015 |
Streambed | sand | bedrock | 3a | 0.449** | 0.176 | −0.503** | 0.274** | 0.366** |
% Variance explained in PCA | Â | Â | Â | Â | Â | Â | ||
Proportion | Â | Â | Â | 24.8 | 15.1 | 13.8 | 9.3 | 8.4 |
Cumulative | Â | Â | Â | 24.8 | 39.7 | 53.6 | 62.8 | 71.2 |