TABLE 1.
Environmental variables and fish species number at each river reach in the lower Jinsha River during sampling periods.
| Water Temperature (°C) | Conductivity (μS/cm) | DO (μS/cm) | pH | Turbidity (FNU) | Chlorophyll‐a (μg/L) | CODMn (mg/L) | TN (mg/L) | TP (mg/L) | BOD5 (mg/L) | Water velocity (m/s) | Substrate type | Species number | |
| Downstream | Sand | 29 | |||||||||||
| Summer | 20.7 | 336.90 | 9.01 | 8.21 | 7.24 | 1.54 | 1.89 | 0.73 | 0.06 | 1.11 | 0.60 | 20 | |
| Autumn | 21.4 | 307.10 | 10.28 | 8.48 | 44.65 | 0.15 | 1.79 | 1.60 | 0.14 | 1.02 | 0.80 | 12 | |
| Winter | 19.0 | 260.40 | 8.92 | 8.48 | 4.60 | 0.30 | 0.52 | 0.91 | 0.08 | 0.62 | 0.55 | 17 | |
| Middle | Silt, gravel and sand | 17 | |||||||||||
| Summer | 21.8 | 360.90 | 8.81 | 8.25 | 3.86 | 0.21 | 2.02 | 0.78 | 0.11 | 3.21 | 0.20 | 12 | |
| Autumn | 21.4 | 276.70 | 9.74 | 8.35 | 24.79 | 0.19 | 1.51 | 0.81 | 0.05 | 1.09 | 0.32 | 12 | |
| Winter | 18.2 | 272.65 | 9.30 | 8.50 | 4.44 | 0.27 | 0.65 | 1.19 | 0.07 | 0.69 | 0.25 | 8 | |
| Upstream | Sand and Gravel | 18 | |||||||||||
| Summer | 19.6 | 327.38 | 9.51 | 8.13 | 10.40 | 0.54 | 1.82 | 1.20 | 0.09 | 1.36 | 1.00 | 10 | |
| Autumn | 19.5 | 259.17 | 10.29 | 8.51 | 90.32 | 0.43 | 1.91 | 0.64 | 0.08 | 1.60 | 1.10 | 10 | |
| Winter | 15.8 | 285.88 | 8.88 | 8.62 | 16.96 | 0.69 | 0.75 | 1.18 | 0.12 | 1.18 | 0.80 | 12 |