CAJ | 학술논문

根据2012年南广河（四川境内段）17个采样断面（3个参照点，14个受损点）6次底栖动物采样数据，对18个生物参数进行分布范围、判别能力和Pearson 相关性分析，最终确定南广河流域生物完整性指数（B-IBI）由EPT分类单元数、甲壳动物和软体动物分类单元数、甲壳动物和软体动物的个体相对丰度、敏感类群分类单元数、耐污类群的个体相对丰度、捕食者个体相对丰度和襀翅目个体相对丰度等7个指数组成。采用比值法统一各入选生物参数量纲，计算其IBI指数值和B-IBI指标赋分（BIBr）值。结果表明，在17个采样断面中，BIBr分值在90分以上的有6个，80～90分之间的有3个，70～80分之间的有2个，60～70分之间的有4个，60分以下的有2个。从分布趋势看，BIBr 分值较高的点（80分以上）主要分布在支流（如塘坝乡、马家岩）和干流上游少数几个点（如石碑乡、沐滩村和凉水井），而下游特别是接近河口部分的几个采样断面均较低，大窝镇和南广镇两个断面的分值更在60分以下。
근거2012년남엄하（사천경내단）17개채양단면（3개삼조점，14개수손점）6차저서동물채양수거，대18개생물삼수진행분포범위、판별능력화Pearson 상관성분석，최종학정남엄하류역생물완정성지수（B-IBI）유EPT분류단원수、갑각동물화연체동물분류단원수、갑각동물화연체동물적개체상대봉도、민감류군분류단원수、내오류군적개체상대봉도、포식자개체상대봉도화적시목개체상대봉도등7개지수조성。채용비치법통일각입선생물삼수량강，계산기IBI지수치화B-IBI지표부분（BIBr）치。결과표명，재17개채양단면중，BIBr분치재90분이상적유6개，80～90분지간적유3개，70～80분지간적유2개，60～70분지간적유4개，60분이하적유2개。종분포추세간，BIBr 분치교고적점（80분이상）주요분포재지류（여당패향、마가암）화간류상유소수궤개점（여석비향、목탄촌화량수정），이하유특별시접근하구부분적궤개채양단면균교저，대와진화남엄진량개단면적분치경재60분이하。
Benthic macro-invertebrate samples were collected 6 times from 17 sample sections (3 reference sites and 14 damaged sites) in the Nanguanghe River and its adjacent waters in Sichuan Province in 2012. And a benthic index of biotic-integrity (B-IBI) was developed for their health assessment. The analyses of the range of index value distribution, Pearson correlation and judgment ability were performed on eighteen candidate metrics. Seven biological metrics were selected for the establishment of B-IBI via number of EPT taxa, number of Crustacea and Mollusca taxa, density proportion of Crustacea and Mollusca, number of intolerant taxa, density proportion of tolerant taxa , predator and plectoptera. B-IBI and B-BIBr (B-IBI relative) were calculated when these selected indices were transformed into a uniform score by using the ratio scoring method. The results showed that among the 17 sample sections in Nanguanghe River and its adjacent waters, 6 sections had BIBr value over 90, 3 between 80 -90, between 70 -80 was 2, 4 between 60-70 and 2 under 60. Moreover, the sampling sections with high BIBr value (over 80) were mainly situated in the influent(e.g., Tangba Village and Majiayan Village) and upper reaches of main stream (e.g., Shibei Village, Mutan Village and Liangshuijin Village); and the BIBr value of sampling sections of downstream, especially approaching to the estuary, were relatively low, especially the two sample sections Dawo Town and Nanguang Town were below 60.