太湖五里湖着生藻类群落结构特征分析
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2020-03-10 10:46:07
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江西农业大学学报2015,37(2):346—352ActaAgrieuhuraeUniversitatisJiangxiensishttp://xuebao.jxau.edu.enDOI:10.13836/j.jjau.2015053丁娜,徐东坡,刘凯,等.太湖五里湖着生藻类群落结构特征分析[J].江西农业大学学报,2015,37(2):346—352太湖五里湖着生藻类群落结构特征分析丁娜,徐东坡,刘凯,周彦锋(1.南京农业大学无锡渔业学院,江苏无锡214081;2.农业部长江下游渔业资源环境科学观测实验站,中国水产科学研究院内陆渔业生态环境和资源重点开放实验室,中国水产科学研究院淡水渔业研究中心,江苏无锡214081)摘要:通过对2009年5月一2010年6月五里湖人工基质上着生藻类群落的全年连续监测,研究了五里湖着生藻类群落的种类组成、数量及其时空差异。结果表明,五里湖共检出着生藻类5门34属43种,其中硅藻门为全年优势门类,共l2属24种,占着生藻类总种数的55.81%,着生藻类密度变化范围为(0.88—2.73)×10ind./cm,年平均密度为1.95x10ind./cm。空间上淤泥底质水域年均密度最高为3.90x10ind./cm,而沙石底质水域最低为1.82x10ind./cm;结果表明五里湖着生藻类的种类数和密度呈现明显的季节差异,由多到少依次为夏季、秋季、春季、冬季。Pielou均匀度指数和香农一威纳多样性指数均以夏季最高,全年变化范围分别为2.12~2.94和O.76-O.88,表明五里湖着生藻类群落结构资源丰富,群落结构处于较完整状态。关键词:着生藻类;群落特征;时空分布;五里湖中图分类号:X172文献标志码:A文章编号:1000—2286(2015)02—0346—07CharacteristicsofPeriphyticAlgaeCommunitiesinWuliLake,LakeTaihuDINGNa,XUDong—po,LIUKai,ZHOUYan—feng(1.WuxiFisheriesCollege,NanjingAgriculturalUniversity,Wuxi214081,China;2.ScientificObservingandExperimentalStationofFisheryResourcesandEnvironmentintheLowerReachesoftheChangjiangRiv—er,MinistryofAgricultureKeyLaboratoryofEcologicalEnvironmentandResourcesofInlandFisheries,FreshWaterFisheriesResearchCenter,CAFS,Wuxi214081,China)Abstract:AmonthlymonitoringprogramofperiphyticalgaewasconductedonWuliLakeinWuxiCityfromMay2009toJune2010.Basedontheinvestigations,periphyticalgaespeciescomposition,biomass,tempo—raldistributionandcommunitystructurewereanalyzedwithPielouuniformityindex,McnaughtonpredominanceindexandShannon—Wienerdiversityindex.Theresultsshowedthattherewere5classesincluding43speciesofperiphyticalgaeinWuliLake.Amongthem,Bacillariophytawasthepredominantphylum,whichhad24spe—cies,accountingfor55.81%ofthetotalspecies.Chlorophytawasrecorded16species,whichaccountedfor37.21%ofthetotalspecies.1,3speciesofCyanophytaandCryptophytawererecordedrespectively,1speciesofEuglenophytawasrecorded,whichaccountedfor2.33%.Therewere20speciesofperiphytiealgaebeingthedominantspeciesinWuliLake;BacillariophytawasthedominantclassinWuliLake.Thebiomas
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