赵鑫,王琳,郑帅,王芳,刘扬

• 1:华北水利水电大学水利学院
• 2:中国水利水电科学研究院

摘要(Abstract)：

为探究无定河流域源头区河流浮游生物和底栖动物的种类、数量、多样性等群落结构特征和环境因子的关系,以无定河流域源头区干流红柳河以及两条重要支流海流兔河和纳林河为研究对象,对河流浮游生物与底栖动物进行野外调查采样,采用Shannon-Wiener多样性指数、典范对应分析(CCA)等方法分析了无定河流域源头区浮游动植物和底栖动物群落特征及与环境因子的关系,识别影响群落分布的关键影响因子。结果显示:无定河源头区浮游生物和底栖动物较为丰富,共监测到浮游植物7门51种,以蓝藻门为优势门;浮游动物23种,以原生动物为优势门;底栖动物5门20科36种,以扁形动物门中的涡虫为优势种。支流的生物种类、数量和多样性指数均优于干流,上游均优于下游,其中纳林河生物多样性最丰富。典范对应分析的生物群落与水质关系表明,氨氮、COD和总氮是影响无定河流域源头区浮游生物和底栖动物群落结构的主要水环境指标。综合生物多样性指数与水体理化指标评估无定河源头区目前水质状况为中污染。

关键词(KeyWords)： 无定河流域;浮游生物;底栖动物;群落特征;环境因子;水环境;水质

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2018YFC0408103);; 中国水科院重点项目(WR0202A092020)

作者(Author): 赵鑫,王琳,郑帅,王芳,刘扬

DOI: 10.13928/j.cnki.wrahe.2021.10.012

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