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时间:2019-05-27
《应用底栖动物完整性指数评价滇池流域入湖河流生态系统健康》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、J.LakeSci.(湖泊科学),2013,25(1):91—98http://www.jlakes.org.E—mail:jlakes@niglas.ac.cn⑥2013byJournalofLakeSciences应用底栖动物完整性指数评价滇池流域入湖河流生态系统健康苏玉,曹晓峰,黄艺H(1:北京大学环境科学与工程学院,北京100871)(2:北京大学环境与能源学院,深圳518055)摘要:采用底栖动物完整性指数(B-IBI)评价滇池流域人湖河流健康状况.根据滇池流域38个样点(9个参照点,29个干扰点)于2009
2、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、Speamaan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
3、.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,l6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StreamecosystemhealthassessmentofinflowriversinLakeDianchicatchmentbyusingBenthicIntegrityBioticIndex(B—IBI)SUYu.CAOXiaofeng&H
4、UANGYi(1:CollegeofEnvironmentalSciencesandEngineering,PekingUniversity,BeOing100871,P.R.China)(2:SchoolofEnvironmentandEnergy,PekingUniversity,Shenzhen518055,尸.R.China)Abstract:BenthicIntetyBioticIndex(B—IBI)wasusedtoevaluatethehealthofinflOWriversinLakeDianchio
5、fYunnanProv—ince,China.Macroinvertebrateassemblageswerecollectedfrom38samplingsitesinLakeDianchi,including9sitesthatwereun—disturbedorlessdisturbedand29sitesthatweredisturbediUwetseasonofJuly—Aug.2009anddryseasonofJan.一Feb.2010.Therangeofindexvaluedistribution,s
6、pearmancorrelationandjudgmentabilitywereanalyzedforthe19biologicalparameters,in—eludingShannon—Wienerindex;totalnumberoftaxa;totaldensity;taxanumbersofCmstacea+Molusca,Hirudinea,andMollus—cataxa;percentageofCrustaeea+Mollusca,Himdinea,Molusca,Oligochaeta,Limnodr
7、ilushoffmeisteri,Chironomidae,Oli—gochaeta/Hirudinea,Gatherers,Predator,Omnivore,andScrapers;percentageoftoleranttaxa;andGoodnightindex.RatioSCO-ringmethodforB—IBIindexwasusedtogetauniformscore.Byusingtheeach20percentilesofB·IBIasacriteriatoevaluatetheaquaticeco
8、systemhealth,theresultsshowedthat,healthcriteriawhenB一1B1>1.62,sub—healthwhen1.03—1.62,good-fairwhen0.31—1.03.fairwhen0.10—0.31.andpoorwhenB-IBI<0.10.TheB—IBIindexwas
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