Table 1 Averages of selected environmental variables during the study period (2004–2005) at river sections near the three sampling sites along Yangtze River. Data are taken from Wang et al. (2014)
Variable | Upstream | Midstream | Downstream |
|---|---|---|---|
Flow rate, m s−1 | 1.75 | 0.36 | 0.17 |
TP, mg L−1 | 0.216 | 0.145 | 0.138 |
TN, mg L−1 | 1.665 | 1.494 | 1.357 |
pH | 7.36 | 7.9 | 8.2 |
DO, mg L−1 | 7.28 | 8.04 | 8.97 |
Conductivity, μs cm−1 | 248 | 372 | 279 |
COD, mg L−1 | 13.64 | 10.95 | 16.18 |
Chl a, mg m−3 | 2.9 | 14.7 | 15.0 |
Number of fish species | 22 | 12 | 14 |