| 摘要: |
| 采用底栖动物完整性指数(B-IBI)评价滇池流域入湖河流健康状况.根据滇池流域38个样点(9个参照点,29个干扰点)于2009年丰水期和2010年平水期采得的大型底栖动物数据,对19个生物参数进行分布范围、Spearman相关性和判别能力分析,确定构成滇池流域底栖动物生物完整性的指数为甲壳动物+软体动物分类单元数、集食者%、捕食者%和耐污类群%.用比值法统一量纲,计算各个生物参数的值,并将所得的值相加即得到B-IBI指数值.根据B-IBI指数值的25%分位数确定健康等级标准,并对小于25%分位数的值进行四等分,即得到滇池流域底栖动物完整性的评价标准,B-IBI >1.62为健康,1.03~1.62为亚健康,0.31~1.03为一般,0.10~0.31为较差,<0.10为极差.评价结果表明,滇池流域的38个样点中,16个为健康,5个为亚健康,6个为一般,6个为较差,5个为极差.B-IBI值与硝态氮和水温有较大的负相关关系,与其他理化因子相关性不明显. |
| 关键词: 滇池流域 底栖动物 B-IBI指数 生物完整性 健康评价 |
| DOI：10.18307/2013.0112 |
| 分类号: |
| 基金项目:国家水体污染控制与治理科技重大专项项目(2012ZX07501002-006)资助 |
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| Stream ecosystem health assessment of inflow rivers in Lake Dianchi catchment by using Benthic Integrity Biotic Index (B-IBI) |
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SU Yu1, CAO Xiaofeng2, HUANG Yi1
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1.College of Environmental Sciences and Engineering, Peking University, Beijing 100871, P.R.China;2.School of Environment and Energy, Peking University, Shenzhen 518055, P.R.China
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| Abstract: |
| Benthic Integrity Biotic Index (B-IBI) was used to evaluate the health of inflow rivers in Lake Dianchi of Yunnan Province, China.Macroinvertebrate assemblages were collected from 38 sampling sites in Lake Dianchi,including 9 sites that were undisturbed or less disturbed and 29 sites that were disturbed in wet season of July-Aug.2009 and dry season of Jan.-Feb.2010.The range of index value distribution,spearman correlation and judgment ability were analyzed for the 19 biological parameters,including Shannon-Wiener index;total number of taxa;total density;taxa numbers of Crustacea+Mollusca,Hirudinea,and Mollusca taxa;percentage of Crustacea+Mollusca,Hirudinea,Mollusca,Oligochaeta,Limnodrilushoffmeisteri,Chironomidae,Oligochaeta/Hirudinea,Gatherers,Predator,Omnivore,and Scrapers;percentage of tolerant taxa;and Goodnight index.Ratio scoring method for B-IBI index was used to get a uniform score.By using the each 20 percentiles of B-IBI as a criteria to evaluate the aquatic ecosystem health,the results showed that,health criteria when B-IBI > 1.62,sub-health when 1.03 1.62,good-fair when 0.31-1.03,fair when 0.10-0.31,and poor when B-IBI < 0.10.The B-IBI index was positive correlation to NO-3-N and water temperature,but not significantly correlation to other factors. |
| Key words: Lake Dianchi catchment zoobenthos Benthic Integrity Biotic Index biological integrity health assessment |
