RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2020, Vol. 29 >> Issue (6): 1374-1386.doi: 10.11870/cjlyzyyhj202006012

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River Health Assessment of Hun River Basin Based on Benthic Index of Biological Integrity

ZHANG Yu-hang 1，2 , QU Xiao-dong 2, WANG Shao-ming 3, ZHU Yao 2 , LIU Xiao-bo 2 , ZHANG Hai-ping 2, ZHANG Min 2 , SUN Shi-jun 1   

  1. 摘要： 应用大型底栖动物生物完整性指数（Benthic Index of Biological Integrity, B-IBI）评价河流健康已成为河流生态系统管理的重要方法。根据2010年5月对浑河流域62个采样点的底栖动物调查数据，基于采样点的水质等级、栖息地质量综合评估指数、人类干扰强度和河岸土地利用评估等标准，选择同属于辽河水系的太子河流域的8个采样点作为参照点，构建浑河流域B-IBI生物完整性指数。通过对34个生物参数的分布范围检验、判别能力分析以及相关性检验，最终确定浑河流域B-IBI生物完整性指数由总分类单元数、EPT（蜉蝣目Ephemeroptera、襀翅目Plecoptera、毛翅目Trichoptera）相对丰度、耐污类群相对丰度、最优势类群分类单元数、直接收集者相对丰度以及香农威纳多样性指数6个参数构成。根据各参数值随干扰增强的变化趋势，采用比值法计算各指标的分值和评价标准。结果表明：浑河流域B-IBI平均得分为2.56，河流健康状态处于一般状态；62个采样点中，9个处于健康状态，13个处于亚健康状态、22个处于一般状态、10个处于差状态，8个处于极差状态；从流域空间尺度上来看，河流健康状态从上游区到下游区逐渐变差。相关性分析表明，B-IBI与水温、电导、溶解性固体总量、硝酸盐、总氮、五日生化需氧量等水环境指标呈现显著负相关，表明B-IBI指数对于水质污染具有较好的指示性作用。综上所述，浑河流域由于受城市工业区的分布影响，大型底栖动物生物完整性呈现出明显的空间分布差异，上游区河流生物完整性较好、中下游底栖动物群落呈现出明显的退化趋势。
  • Online:2020-06-20 Published:2020-07-20

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