|
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
| | | | | | |
|
Proportion
| | | |
24.8
|
15.1
|
13.8
|
9.3
|
8.4
|
|
Cumulative
| | | |
24.8
|
39.7
|
53.6
|
62.8
|
71.2
|
- ** P < 0.001
-
aMedian values given for riparian vegetation (1 = open, 2 = brush and 3 = forest), streambed-particle size (min; 1 = mud/silt and max; 6 = bedrock), and canopy cover. (1 = open, 2 = partial and 3 = complete). Rankings followed McCreadie et al. [34]
