Table 1. Dissimilarity in feeding trait composition.
| Functional feeding groups |
Contribution |
Mean density |
|||
|---|---|---|---|---|---|
| BF→FA | FA→FR | BF | FA | FR | |
| A. Manipulated stream | |||||
| Herbivores | 57.82 | 28.08 | 647 (231) | 4,325 (2,022) | 1,878 (348) |
| Collector–gatherers | 6.26 | 4.0 | 43 (25) | 447 (322) | 169 (83) |
| Predators | 5.71 | 4.25 | 60 (43) | 451 (357) | 244 (246) |
| Collector–filterers | 0.83 | 0.58 | 60 (42) | 51 (47) | 31 (29) |
| Shredders | 0.72 | 0.49 | 4 (5) | 46 (47) | 23 (13) |
| Overall dissimilarity | 71.35 | 37.4 | |||
| B. Reference stream | |||||
| Shredders | 15.73 | 14.07 | 4,969 (245) | 7,943 (2,875) | 9,847 (1,803) |
| Herbivores | 2.44 | 2.23 | 1,203 (235) | 1,513 (451) | 1830 (245) |
| Collector–gatherers | 1.12 | 2.73 | 403 (75) | 231 (117) | 815 (618) |
| Predators | 0.92 | 1.01 | 244 (98) | 321 (152) | 110 (74) |
| Collector–filterers | 0.67 | 0.59 | 111 (23) | 150 (220) | 87 (71) |
| Overall dissimilarity | 20.88 | 20.6 | |||
Relative contribution (%) of the five functional feeding groups to the Bray–Curtis dissimilarity (SIMPER analysis) and overall dissimilarity (%) between base flow and flow alteration stages (BF→FA), and flow alteration and flow recovery stages (FA→FR) in the manipulated (A) and reference (B) reach. Mean density (ind m−2) and s.d. of the five functional feeding groups for base flow (BF), flow alteration stages (FA), and flow recovery stages (FR) in the manipulated (A) and reference (B) reach.