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酸性河流中浮游动物群落分析

DOI: 10.3724/SP.J.1145.2012.00928, PP. 928-934

Keywords: 酸性矿山废水,浮游动物,种类组成,丰度,生物多样性

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Abstract:

为研究浮游动物对广东大宝山矿区外排酸性废水的响应,以评估周边及下游水域的水生态环境现状,于2010年9月采样调查了广东大宝山矿区周边河流的浮游动物状况,对比分析了受矿山酸性废水影响严重的水域与影响较小的水域浮游动物的种类组成、丰度、生物多样性指数及均匀度等指标差异,并探讨了浮游动物群落与环境因子之间的关系.结果表明,检出的46种浮游动物中轮虫类种类最多,有24种,枝角类和桡足类分别为10种和9种,原生动物仅有3种.其中受污染较为严重的受损组(s1~s3)几乎未发现浮游动物,臂尾轮虫和异尾轮虫在相对受污染影响较小的恢复组(s4~s7)占有较大优势.调查得到的浮游动物最大丰度及生物量分别为378.26ind./l和1.9901mg/l.相关分析表明,ph、总氮、氨氮、高锰酸盐指数(codmn)、硅酸盐及重金属铅和铬等环境因子对浮游动物群落分布影响显著.图3表6参23

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