基于B-IBI指数的秦皇岛市水体健康评价

Assessment of Water Body Health Based on B-IBI Index in Qinhuangdao City

为更准确了解秦皇岛市河流水体健康状况,对石河、新河、戴河、东沙河、饮马河、青龙河、西洋河等7条河流的15个断面的大型底栖无脊椎动物进行了采样调查。采用底栖生物完整性指数(B-IBI)对结果进行评价。此次调查共鉴定出大型底栖无脊椎动物41种,归属于4门7纲28科。优势种为萝卜螺属一种、摇蚊属一种和大粗腹摇蚊属一种。从分类单元数、群落结构组成、耐污能力、生活型和功能摄食类群5个类别选取18个参数,筛选出总分类单元数、大型无脊椎动物敏感类群评价指数(BMWP指数)和刮食者个体数百分比作为构建B-IBI指数的核心参数。B-IBI评价结果表明:西洋河和新河河流生态健康状态为非常健康;东沙河、饮马河、青龙河、戴河、石河河流生态健康状态为一般,没有出现健康状态为差或极差的河流。

To obtain a precise assessment of the water quality status in the rivers of Qinhuangdao City,an extensive sampling survey was undertaken,focusing on the large benthic invertebrate communities within 15 distinct sections of seven prominent rivers,namely Shi River,Xin River,Dai River,Dongsha River,Yinma River,Qinglong River and Xiyang River.The obtained data were subsequently analyzed utilizing the Benthic Index of Biotic Integrity(B-IBI).A total of 41 species belonging to the macrobenthic invertebrate fauna were identified classifying them into four phyla,seven classes and twenty-eight families.The prevailing species included Radix sp.,Chironomus sp.and Rheopelopia sp.A set of 18 parameters were selected from five categories namely taxon number,community structure,pollution tolerance,life type and functional feeding groups.The core parameters for the construction of the Biological Index of Benthic Integrity(B-IBI)index comprised the total taxon number the macroinvertebrate sensitive group evaluation index(BMWP index)and the percentage of predators.The results of the B-IBI evaluation indicated that the ecological health status of the Xiyang River and Xinhe River was categorized as excellent,while the Dongsha River,Yinma River,Qinglong River,Daihe River and Shihe River demonstrated a relatively moderate ecological health status.Notably,no rivers were classified as having poor or extremely poor ecological health.