%0 Journal Article
%T Stream Health Assessment Using a Benthic-Index of Biotic Integrity in Xitiaoxi Stream, Zhejiang Province, China<br>底栖动物完整性指数评价西苕溪溪流健康
%A LI Qiang
%A YANG Lian-fang
%A WU Jing
%A WANG Bei-xin
%A <br>李强
%A 杨莲芳
%A 吴璟
%A 王备新
%J 环境科学
%D 2007
%I 
%X Stream macro-invertebrate assemblages were collected from 64 stream sites in Xitiaoxi Stream, Anji County, Zhejiang Province, China. Thirty-six candidate metrics were evaluated stepwise by distributing range analysis, discriminatory power analysis, and Pearson's correlation analysis. The B-IBI was composed of seven metrics: total taxa, EPT taxa, Coleoptera %, three dominant taxa, Hydropsychidae (Trichoptera) %, filterers %, and Biotic Index (BI). The ratio scoring method was used to transform the value of each metric into a uniform score. A variability coefficient method and an entropy method were used to calculate the weight value of each metric of the B-IBI. The measurement accuracy of the health criteria for the B-IBI derived from all sample data was better than that from only reference data. The entropy method had a higher accuracy (92.9%) than the sum total score method (85.7%) and the variability coefficient method (78.5%) in discriminating stressed and reference sites. The B-IBI health criteria for Xitiaoxi Stream were: B-IBI>0.69=healthy, 0.52-0.68=sub-healthy, 0.35-0.51=good-fair, 0.18-0.34=fair, B-IBI<0.17=poor. The Pearson's correlation analysis between B-IBI and chemical-physical variables showed that the B-IBI strongly corresponded with the habitat quality index (r=0.62, p<0.01), water temperature (r=-0.64, p<0.01), and altitude (r=0.64, p<0.01). Our results suggest that the B-IBI is a good indicator in stream health assessment and should be used in water resource management in China.
%K benthic index of biotic integrity
%K stream
%K health assessment
%K macro-invertebrate<br>B-IBI指数
%K 溪流
%K 健康评价
%K 大型底栖无脊椎动物
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=BFAF7677AA5493B3&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=9CF7A0430CBB2DFD&sid=F77EA1B361947C8B&eid=423FC0C399AA2C41&journal_id=0250-3301&journal_name=环境科学&referenced_num=3&reference_num=26