长江上游支流赤水河流域底栖动物物种多样性与保护对策

张多鹏, 刘洋, 李正飞, 葛奕豪, 张君倩, 谢志才

Species diversity and recommended rehabilitative strategies of benthic macroinvertebrate in the Chishui River, a tributary of the Upper Yangtze River

Duopeng Zhang, Yang Liu, Zhengfei Li, Yihao Ge, Junqian Zhang, Zhicai Xie

表1 赤水河不同河段环境因子的均值和标准差

Table 1 Mean value and standard deviation of local environmental variables in the Chishui River

上游 Upstream 中游 Midstream 下游 Downstream F P 河宽 Channel width (m) 36.07 ± 21.55 77.69 ± 51.53 193.80 ± 43.15 18.869 < 0.001* 流速 Current velocity (m/s) 1.04 ± 0.39 1.32 ± 0.78 0.70 ± 0.60 2.795 0.074 水深 Water depth (m) 0.26 ± 0.21 0.36 ± 0.14 0.63 ± 0.59 5.434 0.009* 海拔 Altitude (m) 920.55 ± 463.32 314.68 ± 51.60 213.55 ± 7.93 46.367 < 0.001* 大石 Boulder (%) 0.57 ± 0.18 0.31 ± 0.37 0.01 ± 0.03 16.172 < 0.001* 卵石 Pebble (%) 0.34 ± 0.89 0.04 ± 0.04 0.01 ± 0.03 6.319 0.004* 沙 Grit (%) 0.46 ± 0.13 0.25 ± 0.23 0.19 ± 0.38 6.036 0.005* 淤泥 Silt (%) 0.21 ± 0.18 0.62 ± 0.41 0.89 ± 0.22 14.465 < 0.001* 铵氮 Ammonia nitrogen (mg/L) 0.19 ± 0.06 0.21 ± 0.12 0.19 ± 0.07 0.262 0.771 总氮 Total nitrogen (mg/L) 3.65 ± 0.85 3.24 ± 0.19 2.71 ± 0.59 3.952 0.028* 总磷 Total phosphate (mg/L) 0.05 ± 0.02 0.06 ± 0.02 0.05 ± 0.01 0.319 0.729 高锰酸盐指数 CODMN (mg/L) 1.78 ± 0.39 2.91 ± 0.78 3.58 ± 0.74 24.169 < 0.001* 电导率 Conductivity (μS/cm) 447.43 ± 164.49 590.49 ± 34.42 402.01 ± 193.23 2.664 0.083 溶解氧 Dissolved oxygen (mg/L) 15.08 ± 1.68 13.50 ± 0.75 12.03 ± 1.76 9.309 < 0.001* pH 7.96 ± 0.41 8.04 ± 0.11 7.95 ± 0.07 0.358 0.701 氧化还原电位 Oxidation-reduction potential (mV) 73.32 ± 31.37 38.95 ± 20.36 42.79 ± 21.34 5.273 < 0.001*