太湖控藻围隔内浮游动物的群落结构特征及水质评价
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2020-03-19 11:17:20
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贵州农业科学2016,44(10):144~148GuizhouAgriculturalSciences[文章编号]1001—3601(2016)10—0445—0144—05太湖控藻围隔内浮游动物的群落结构特征及水质评价沈振华,杨建忠,徐雪英。,朱明胜,张宏伟(1.江苏省太湖渔业管理委员会办公室,江苏苏州215004;2.苏州市水产技术推广站,江苏苏州215100)[摘要]为探明放养鲢、鳙鱼对太湖水质和浮游动物的影响,于2013年6月10日至10月10日在太湖西北部风浪较小的马山镇与竺山之间的湖湾设置大型围隔,放养鲢、鳙鱼进行生物控藻试验,放养比例为3:1,密度为50g/m。,并参照相关评价标准进行水质评价。结果表明:生物控藻区围隔内共有浮游动物4门52种,其中,轮虫类21种、原生动物12种、枝角类11种和桡足类8种,优势种共有12种,轮虫类和棱角类为全年的主要优势种;浮游动物平均密度为388.97ind/L,平均生物量为3.98mg/L;生物多样性指数、均匀度指数分别为2.37和0.38,生物控藻区水体处于中污染水平;水体综合营养状态指数为51.84~61.96,水体处于轻度富营养化状态,水质为轻度污染;两种水体污染评价方法的评价结果不一致,但均表明太湖水体已受到一定程度的污染。[关键词]太湖;生物控藻;水质;浮游动物[中图分类号]s917.4[文献标识码]AZooplanktonCommunityStructureandWaterQualityoftheBiologicalControlEnclosureEcosysteminTaihuLakeSHENZhenhua,YANGJianzhong,XUXueying,ZHUMingsheng,ZHANGHongwei(1.TheOfficeofTaihuLakeFisheryManagementCommittee,Suzhou,Jiangsu215004;2.SuzhouPopularizationStationofFisheryTechnology,Suzhou,Jiangsu215100,China)Abstract:ThebiologicalcontrolenclosureecosystembetweenMashanTownandZhushanLakewasstockedwithsilvercarpandbigheadcarpaccordingto3:1ratioand50g/mfrom10,Juneto10,Octoberin2013andthenthewaterqualitywasevaluatedbyreferencetotherelevantevaluationstandardtodiscusstheeffectsofstockingsilvercarpandbigheadcarponwaterqualityandzooplanktoninTaihuLake.Results:Thereare52zooplanktonspeciesincluding21Rotifers,12Protozoa,11Cladoceraand8Copepods.Thedominantspeciesare12species.RotifersandC:ladoceraaremaindominantspeciesinayear.Theaveragedensityandbiomassofzooplanktonare388.97ind/Land3.98mg/Lrespectively.ThebiologicaldiversityindexandevennessindexofzooplanktoniS2.37and0.38separately,whichindicatesthatthewaterqualityofthebiologicalcontrolenclosureecosystemiSatmoderatepollution1eve1.Thewatercomprehensivenutritionindexofthebiologicalcontro1enclosureecosystemiS51.84~61.96,whichindicatesthatthewateriSinthemildeutrophicationstatusandthewaterqualityiSatmildpollutionleve1.TheevaluationresultsfromtwowaterpollutionevaluationmethodsareinconsistentbuttheresultsbothindicatethewaterofTaihuLakeispollutedtoacertainextent.Key
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