| S/N. | Variable | Compared Classes | Probability | Differences between the classes |
| 1. | B-IBI scores | Pr versus WRr | P = 0.0017 | Very significant |
|
|
| Pm versus WRm | P < 0.0001 | Extremely significant |
|
|
| Pb versus WRb | F(3,81) = 197.55; P < 0.05 | Significant |
| 2. | F-IBI scores | Pr versus WRr | P = 0.02 | Significant |
|
|
| Pm versus WRm | P = 0.0002 | Extremely significant |
|
|
| Pb versus WRb | F(3,81) = 86.29; P < 0.05 | Significant |
| 3. | Turbidity | Pr versus WRr | P = 0.038 | Significant |
|
|
| Pm versus WRm | P = 0.0007 | Extremely significant |
|
|
| Pb versus WRb | F(3,81) = 8.22; P < 0.05 | Significant |
| 4. | % SDI | Pr versus WRr | P = 0.013 | Significant different |
|
|
| Pm versus WRm | P < 0.0001 | Extremely significant |
|
|
| Pb versus WRb | F(3,81) = 30.34; P = 0.05 | Significant |
| 5. | % Odonata | Pr versus WRr | P = 0.0036 | Very significant |
|
|
| Pm versus WRm | P < 0.0001 | Extremely significant |
|
|
| Pb versus WRb | F(3,81) = 15.92; P < 0.05 | Significant |
| 6. | % Dominant taxa | Pr versus WRr | P < 0.0001 | Extremely significant |
|
|
| Pm versus WRm | P < 0.0001 | Extremely significant |
|
|
| Pb versus WRb | F(3,81) = 39.89; P < 0.05 | Significant |
| 7. | % Taxa richness | Pr versus WRr | P < 0.0001 | Extremely significant |
|
|
| Pm versus WRm | P = 0.001 | Very significant |
|
|
| Pb versus WRb | F(3,81) =24.38; P < 0.05 | Significant |