雅鲁藏布江中下游底栖动物物种多样性及其影响因素

李正飞, 蒋小明, 王军, 孟星亮, 张君倩, 谢志才

Species diversity and driving factors of benthic macroinvertebrate assemblages in the middle and lower reaches of the Yarlung Zangbo River

Zhengfei Li, Xiaoming Jiang, Jun Wang, Xingliang Meng, Junqian Zhang, Zhicai Xie

表1 雅鲁藏布江干支流断面底栖动物密度与生物量的比较

Table 1 Comparison of density and biomass of macroinvertebrates in different reaches of the Yarlung Zangbo River

时期 Periods 干流 Main stream 大峡谷上游支流 Upstream branches 大峡谷下游支流 Downstream branches F P 密度 Density (ind./m2) 春季 Spring 477.5 ± 465.6a 1,402.2 ± 1,080.6b 1,075.7 ± 1,319.4b 6.741 0.005 秋季 Autumn 327.1 ± 301.7a 1,219.2 ± 1,008.3b 1,321.9 ± 864.6b 5.945 0.007 生物量 Biomass (g/m2) 春季 Spring 2.12 ± 3.69a 7.05 ± 4.36ab 8.24 ± 7.28b 4.114 0.028 秋季 Autumn 2.89 ± 4.68 5.71 ± 7.50 3.37 ± 2.31 0.872 0.428