资源描述：
《珠江广州段底栖动物群落结构初步研究》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、珠江广州段底栖动物群落结构初步研究第27卷第5期20l1年10月中国环境监测EnvironmentalMonitoringinChinaV01.27No.5Oct.2O1l珠江广州段底栖动物群落结构初步研究蒋万祥,-,赖子尼,彭松耀,高原,杨婉玲,庞世勋(1.中国水产科学研究院珠江水产研究所,广东广州510380;2.枣庄学院生命科学系,山东枣庄277160)摘要:2009年3月对珠江广州大桥到海印桥段底栖动物群落结构进行调查.共采集6种底栖动物样品,其中霍夫水丝蚓为研究区域优势类群,密度和生物量相对丰度分别为96.3%和71.9%.海印桥
2、底栖动物密度和生物量最大,分别为305280ind/m和664.72g/m;中大码头次之,分别为54144ind/m和129.27g/m;广州大桥最小,分别为43200ind/m和93.87g/m.底栖动物群落结构极为不均匀,广州大桥,中大码头和海印桥Shannon—Wiener多样性指数分别为0.34,0.27,0.14;Margalef多样性指数分别为0.32,0.19,0.11,均匀度指数19,0.20,n13,物种丰度分别为6,4和3,属严重污染水平.对理化指标进行分析表明,溶解氧过低是生物多样性低的直接原因,控磷,除磷对降低水体营
3、养水平,恢复生物多样性意义重大.关键词:底栖动物;群落结构;生物多样性;珠江中图分类号:X835文献标识码:A文章编号:1002-6002l20l1)05-0069—04PrimaryStudyofMacroinvertebrateCommunityStructureinthePearlRiverGuangzhouPortionJIANGWan—xiang,eta1.(1.PearlRiverFisheriesResearchInstitute,ChineseAcademicofFisherySciences,Guangzhou510380
4、,China;2.DepartmentofLifeSciences,ZaozhuangUniversity,Zaozhuang277160,China)Abstract:MacroinvertebratecommunitystructurewasstudiedinthePearlRiverGuangzhoubridgetoHaiyinbridgeportioninMarch2009.Theresultsshowedthatsixtaxawerecollected,andamongthemLimnodrilushoffmeisteriwast
5、hedominanttaxon,withdensityandbiomassrelativeabundancewere96.3%and71.9%respectively.Haiyinbridgewasthebiggestsiteindensityandbiomass,withthemwere305280ind/mand664.72g/mseparately;~llowedbyZhongdadocksite,withthemwere54144ind/mand129.27g/m;andlowestintheGuangzhoubridgesite,
6、withthemwere43200ind/mand93.87S/m.Macroinvertebratecommunitystructurewasseriouslyuneven.Shannon-WienerbiodiversityindexinGuangzhoubridge,ZhongdadockandHaiyinbridgewere0.34,0.27,0.14respectively;Margalefbiodiversityindexinthethreesiteswere0.32,0.19,0.11;Evennessindexintheth
7、reesiteswere0.19,0.20,0.13;Richnessinthethreesitessiteswere6,4,3respectively.Thestudywaterwasseriouslypolluted.Byanalysisthephysiochemiealfactors,wefoundthatlowdissolvedoxygencontentwasmainanddirectfactorinfluencingthebiodiversity;limitingandremovingphosphorusmeanalottobio
8、diversityrecoveringinthestudyarea.Keywords:Macroinvertebrate;Communitystructure;Biodivers
