应用底栖动物完整性指数B-IBI评价溪流健康  

A preliminary study on the assessment of stream ecosystem health in south of Anhui Province using Benthic-Index of Biotic Integrity

作　　者：王备新[1] 杨莲芳[1] 胡本进[1] 单林娜[1] 

机构地区：[1]南京农业大学昆虫学系,南京210095

出　　处：《生态学报》2005年第6期1481-1490,共10页Acta Ecologica Sinica

基　　金：国家自然科学基金资助项目(40301047;30370252)~~

摘　　要：B-IBI指数是溪流生态系统健康评价常用指标之一。据安徽黄山地区溪流的33个底栖动物样点数据(11个参照点,22个受损点),对21个生物参数进行分布范围、Pearson相关性和判别能力分析,确定B-IBI指数由总分类单元数、EPT分类单元数、前3位优势分类单元%、粘附者%、敏感类群%和BI指数构成。分别用3分制、4分制和比值法统一各参数量纲,B-IBI指数值即为累加各构成指数的分值或比值。B-IBI箱线图分析表明,上述3种方法计算出的B-IBI值有较高判别能力(IQ=3),能很好地判别参照水体和受损水体,且3者之间具高相关性(r>0.90)。分别依据参照样点和所有样点B-IBI值建立健康评价标准,比较3分制、4分制和比值法对评价结果的准确性,表明用比值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的准确性优于3分制和4分制法。建立了适合祁门县溪流生态系统健康评价B-IBI标准B-IBI>3.59健康,2.7～3.59亚健康,1.8～2.69一般,0.9～1.79差,B-IBI<0.9极差。祁门县21个样点的水体,14个健康,6个亚健康,1个一般。B-IBI与电导率(r=-0.62,p<0.01)和生境质量(r=0.65,p<0.01)显著相关。Stream macro-invertebrate assemblages were collected from 33 stream sites in the south of Anhui Province China, among them 11 were unimpaired or minimally impaired sites and 22 were impaired sites. Twenty-one candidate metrics: Total number of taxa, EPT taxa, Intolerant taxa, Aquatic insects taxa, (Crustacea+Mollusca) taxa, Chironomidae taxa, Shannon-Wiener index, Dominant taxon%, Three dominant taxa%, Trichoptera%, Ephemeroptera%, Diptera%, Chironomidae%, Tolerant taxa%, Intolerant taxa%, (Crustacea+Mollusca)%, Legless organism%, Gatherers%, Filterers%, Clingers% and Biotic Index were calculated and analyzed for the establishment of Benthic Integrated Biotic Index (B-IBI). Results were showed as follows: (1) Eleven metrics had the highest discriminatory power (interquartile range,IQ≥2) between impaired and unimpaired sites, which were Total number of taxa, EPT taxa, Intolerant taxa, Aquatic insects taxa, Shannon-Wiener index, Dominant taxon%, Three dominant taxa%, Intolerant taxa%, Clingers%, Filterers% and Biotic index. (2) Pearson's correlation analysis was performed on all data from 33 sites for the above ten metrics except for Filterers% to evaluate the extent of redundancy in information. Metrics that were strongly correlated (|r|>0.75) measure the same thing, and should not be used together to determine impairment. The Shannon-Wiener index was rejected because strongly correlated with Total number of taxa, EPT taxa, Aquatic insects taxa, Dominant taxon% and Three dominant taxa% (r>0.8),Strong correlations were also existed between Total number of taxa, EPT taxa, Aquatic insects taxa and Intolerant taxa each other (r≥0.85), and of which Total number of taxa was selected for its reflecting more information than others in richness measure. Dominant taxon% was also strongly correlated with Three dominant taxa% (r=0.79), and Three dominant taxa% was selected for its higher correlation (r=0.92) with Shannon-Wiener index than Dominant taxon% (r=0.86). EPT taxa richness is a sensitive and useful metric in wate

关 键 词：B-IBI指数 健康评价 大型底栖无脊椎动物 溪流 

分 类 号：X824[环境科学与工程—环境工程]