Table 3.
SIMPER results identifying species contributing the most to differences in assemblage structures before and after regime shifts in three reaches of the Yangtze River upstream from the TGR.
| Mudong | Hejiang | Yibin | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Species | Mean abundance percentage (%) | Dissimilarity (%) | Species | Mean abundance percentage (%) | Dissimilarity (%) | Species | Mean abundance percentage (%) | Dissimilarity (%) | |||
| Pre-shift | Post-shift | Pre-shift | Post-shift | Pre-shift | Post-shift | ||||||
| Coreius guichenoti | 51.2 | 7.6 | 31.9 | Coreius guichenoti | 34.4 | 5.1 | 23.2 | Saurogobio dabryi | 39.2 | 28.6 | 16.7 |
| Saurogobio dabryi | 0.2 | 13.6 | 9.8 | Squalidus argentatus | 2.5 | 15.7 | 10.6 | Coreius guichenoti | 14.8 | 4.5 | 12.3 |
| Rhinogobio cylindricus | 4.6 | 15.2 | 8.2 | Botia superciliaris | 5.3 | 10.5 | 8.1 | Xenophysogobio boulengeri | 5.4 | 13.6 | 9.9 |
| Coreius heterokon | 12.7 | 9.9 | 5.9 | Pelteobagrus vachelli | 13.8 | 12.8 | 6.5 | Botia superciliaris | 2.2 | 8.6 | 8.2 |
| Pelteobagrus vachelli | 12.2 | 8.8 | 5.3 | Saurogobio dabryi | 4.8 | 10.1 | 6.2 | Jinshaia sinensis | 1.9 | 7.1 | 5.9 |