基于底栖动物完整性指数B-IBI的淮河流域水系生态健康评价  

Eco-Health Assessment of Huaihe River System Based on Benthic-Index of Biotic Integrity

作　　者：张颖[1] 胡金[2] 万云[2] 刘其根[1] 查玉婷[1] 孙月娟[1] 胡忠军[1] 

机构地区：[1]上海海洋大学农业部淡水水产种质资源重点实验室,上海201306 [2]南京大学生命科学学院,江苏南京210093

出　　处：《生态与农村环境学报》2014年第3期300-305,共6页Journal of Ecology and Rural Environment

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07501002-003;2008ZX07526-002-03);上海高校知识服务平台上海海洋大学水产动物遗传育种中心(ZF1206)

摘　　要：依据2010年7—8月淮河流域的43个底栖动物样点数据（7个参照点和36个受损点）数据，对17个候选生物学指数值的分布范围、相关关系和判别能力进行分析，从中筛选出总分类单元数、EPT分类单元数、敏感类群比例和生物指数构成淮河流域的（B-IBI）指标体系。分别用3分制、4分制以及比值法统一各参数量纲，B-IBI指数值即为各构成指数分值的加和。箱线图法分析表明，上述3种方法计算出的B-IBI值均具有较高的判别能力（QI=3），且三者之间具有高相关性（r〉0.90）。分别依据参照点B-IBI值分布的25%分位数和所有样点B-IBI值分布的95%分位数法建立健康评价标准，并比较3种方法的评价结果准确性，结果表明采用3分制和4分制法统一各参数量纲并依据所有样点的B-IBI值建立的健康评价标准优于比值法。选取较常用的3分制法建立了适合淮河流域生态系统的健康评价标准：B-IBI值〉19.2，健康；〉14.4~19.2，亚健康；＞9.6~14.4，一般；＞4.8~9.6，差；≤4.8，极差。评价结果表明，淮河流域43个样点中，6个处于健康状态，5个处于亚健康状态，其余样点均处于不健康状态。Based on the data collected from 43 zoobenthos sampling sites （7 reference sites and 36 impaired sites） in Huaihe River Valley from July -to Auguest, of 2010, analysis was done of seventeen candidate biological index values for distribution range, correlations and discriminability, and meanwhile, total number of taxa, number of EPT taxa, proportion of sensitive groups and biotic index were screened out to form a B-IBI index system for the Huaihe River Vallley. 3 -point system, 4- point system and ratioing technique was used separately to uniformized dimensions of various parameters and B-IBI value was then the sum of the values of various component indices of the system. Discriminatory power analysis shows that the B-IBI values worked out with the three methods were all quite high in discriminability （QI=3）, moreover, the three methods were highly correlated （r 〉 0.90）. Health evaluation criteria were established separately based on 25 quantile of the distribution of B-IBI values of the reference sites and 95 quantile of the distribution of all the sampling sites, and comparison was performed between the three methods in accuracy of the evaluation. Results show that the health evaluation criteria established on the B-IBI values of all the sampling sites and dimensions of various parameters uniformized with the 3-point system and 4-point system are superior to that based on the ratioing method. Therefore, the commonly used 3-point system method was selected for use to establish health evaluation criteria suitable for the Huaihe River Vvalley. B-IBI 〉19.2 means healthy; B-IBI varying in the range of ＞14.4-19.2, sub-healthy; B-IBI in the range of ＞9.6-14.4, fair; B-IBI in the range of ＞4.8-9.6, poor, B-IBI≤4.8, extremely poor. Evaluation of the 43 sampling sites shows that 6 are in healthy state, 5 in sub-healthy state, and the other 32 in unhealthy state.

关 键 词：B-IBI 健康评价 底栖动物 淮河流域 

分 类 号：X171[环境科学与工程—环境科学]