基于B-IBI的长江源生态健康评价  

Evaluation of ecological health degree in source area of Changjiang River based on Benthic Index of Biotic Integrity

作　　者：简文杰 张斌兴 罗洪波 万雷 马祥元 JIAN Wenjie;ZHANG Binxing;LUO Hongbo;WAN Lei;MA Xiangyuan(Changjiang Space Information Technology Engineering Co.,Ltd.(Wuhan),Wuhan 430010,China)

机构地区：[1]长江空间信息技术工程有限公司(武汉),湖北武汉430010

出　　处：《人民长江》2023年第11期31-35,共5页Yangtze River

摘　　要：基于底栖动物完整性指数(B-IBI)对长江源各个河段进行生态健康评价分析,可为长江源河流管理提供参考依据。根据2022年8月(丰水期)和10月(枯水期)对长江正源沱沱河和长江南源当曲7个典型断面的大型底栖无脊椎动物调查监测的结果,经判别能力分析和冗余度分析,选取了总分类单元数、摇蚊个体数百分比、优势类群个体数百分比和粘附者个体数百分比4个参数计算了B-IBI。基于该指数,构建了长江源生态健康的评价指标体系和标准,并对其进行了评价。结果显示:长江源总体处于健康状态,局部评分较低,尤其是波陇曲汇入口至唐古拉山镇河段受损较为严重。初步推断该段经过人口较为密集区域,污染物负荷较大导致。建议对受损河段重点关注,并有针对性地开展生态修复整治。Evaluation on ecological health in source area of Changjiang River based on Benthic Index of Biotic Integrity(B-IBI)can be a reference basis for river management of this region.This paper carried out ecological health assessment and analysis on each river section of the source of the Changjiang River.According to the results of the survey and monitoring of macrobenthic invertebrates in seven typical sections of the Tuotuo River and Dangqu River in August(wet season)and October(dry season)of 2022,the B-IBI was calculated by four parameters,namely the total number of taxonomic units,the percentage of chironomid individuals,the percentage of individuals in dominant groups and the percentage of individuals in adherents.Based on this index,the evaluation index system and standard of ecological health of the source area of the Changjiang River were constructed and evaluated.The results show that the source of the Changjiang River is generally in a healthy state,however with low scores in local sections,especially the section from the Bolongqu River convergent entrance to Tanggulashan Town,which is seriously damaged.It is preliminarily inferred that this section passes through a densely populated area and is polluted by a large load.It is suggested to focus on the damaged river section and carry out targeted ecological rehabilitation.

关 键 词：河流健康评价 大型底栖无脊椎动物 B-IBI 生态健康度 长江源 

分 类 号：Q958[生物学—动物学]