Table 4.
Average abundance and similarity of organisms within each season from March 2013 to April 2014 for spring (March–May), summer (June–August), autumn (September to November) and winter (December to February). Figures in italics highlight organisms with more than 10% contribution to the total organisms present at each season
| Spring average similarity, 49.17 | Contribution (%) | Winter average similarity, 33.50 | Contribution (%) |
| Baetidae (E) | 34.8 | Baetidae (E) | 19.53 |
| Chironomidae | 25.5 | Chironomidae | 15.96 |
| Heptageniidae (E) | 10.5 | Tipulidae | 15.41 |
| Gammaridae | 10.2 | Heptageniidae (E) | 11.63 |
| Tubificidae | 3.93 | Hydropsychidae (T) | 7.63 |
| Tipulidae | 3.35 | Tubificidae | 6.69 |
| Lumbriculidae | 3.18 | Simulidae | 4.85 |
| Autumn average similarity, 37.14 | Contribution (%) | Lumbriculidae | 3.9 |
| Baetidae (E) | 66.1 | Erpobdellidae | 3.66 |
| Chironomidae | 8.31 | Gammaridae | 3.42 |
| Gammaridae | 7.91 | ||
| Heptageniidae (E) | 6.68 | ||
| Hydropsychidae (T) | 3.37 | ||
| Summer average similarity, 36.50 | Contribution (%) | ||
| Baetidae (E) | 42.2 | ||
| Chironomidae | 19.9 | ||
| Gammaridae | 10.5 | ||
| Ephemerellidae (E) | 7.3 | ||
| Tubificidae | 3.49 | ||
| Heptageniidae (E) | 3.38 | ||
| Lumbriculidae | 2.23 | ||
| Rhyacophilidae (T) | 1.91 |
Ephemeroptera (E); Plecoptera (P) and Trichoptera (T)