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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)

From: Initial response of fish trophic niche to hydrological alteration in the upstream of Three Gorges Dam

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