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黄河主要水系水环境与底栖动物调查研究
Authors
傅小城
叶麟
徐耀阳
蔡庆华
Publication date
1 January 2010
Publisher
Abstract
2005年5月对黄河水系的42个采样点进行了水质与底栖动物的调查研究。调查结果表明,黄河水质总体污染严重,干流兰州段以上相对较好,但下游及支流水质污染严重。主要污染指标为总氮超标。在这些样点上共采到底栖动物90种,分属5门23科60属。其中,水生昆虫67种(74.4%),寡毛类15种(16.7%),软体动物5种(5.6%),甲壳动物与线形动物各一种(2.2%)。物种组成上水生昆虫的摇蚊幼虫和寡毛类的水丝蚓为主要类群。在数量分布上,全流域底栖动物的平均密度为411.1ind·m2。,生物量为1520.1mg·m2。干流密度与生物量(144.3ind·m2和151.6mg·m-2)相对支流(1173.5ind·m-2和5430.1mg·m-2)明显偏低。与1958年和1982年的资料相比,所获得的物种数相近,但组成上有很大变化:而在密度生物量上,这次调查结果相对较低
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Institute of Hydrobiology, Chinese Academy Of Sciences
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Last time updated on 25/11/2020