第47卷,第2期湖南林业科技Vol.47,No.22020年4月HunanForestryScience&TechnologyApr.,2020DOI:10.3969/j.issn.1003-5710.2020.02.009罗学卫,刻静逸,杨蕊,李德先,严静芬.牛艳东.南洞庭湖南荻退出经营前后种群变化特征研究[J].湖南林业科技.2020.47(2):53-57.LUOXW,LIUJY,YANGR,LIDX,YANJF,NIUYD.CharacteristicsofTriarrhetuiIularioripariapopulationchangeofbeforeandaftertheexitmanagementinSouthDongtingLakeJJ.HunanForestr)'Science&Technology,2020.47(2):53-57.南洞庭湖南荻退出经营前后种群变化特征研究罗学卫I,刘静逸2。杨蕊2。李德先I,严静芬I,牛艳东2Q(1.益阳南洞庭湖自然保护区沅江市管理局,湖南沅江413100;2.湖南省林业科学院.湖南长沙410004;3.湖南洞庭湖湿地生态系统国家定位观测研究站,湖南岳阳4140()0)摘要:为了解南洞庭湖退出经营后南荻种群变化特征,以南洞庭湖经营与退出经营后1年的展叶期南荻为研究对象,研究南荻种群的株高、地径、密度、地上部分生物量的动态变化。结果表明:南洞庭湖南荻种群退出经营后单位面积活立物植株平均密度为13.68茎・m-2,较经营样地显著降低;植株平均高度为1.86m,较经营样地明显增加;植株平均地径为2.39cm,较经营样地有所减少;退出经营样地内枯立物与活立物植株数量比为1:1.21,单位面积地上部分生物量变化不显著,新增活立物地上部分生物量显著下降。该研究为科学评价南荻退出经营对水土环境生态效应提供了重要的基础数据。关键词:南洞庭湖;南荻;种群特征中图分类号:Q145\1文献标识码:A文章编号:1003-5710(2020)02-0053-05CharacteristicsofTriarrhenalutarioripariapopulationchangeofbeforeandaftertheexitmanagementinSouthDongtingLakeLUOXuewei1,LIUJingyi2,3,YANGRui2,3,LIDexian1,YANJingfen1,NIUYandong23(1.AdministrationBureauofYuanjiangCity,SouthDongtingLakeNatureReserveofYiyangCity,Yuaiijiang413100,Hunan,China;2.HunanAcademyofForestry,Changsha41(X)04,Hunan,China;3.DongtinglakeNationalPositioningObservationandKesearcliStationofWetlandEcosystemofHunanProvince,Yueyang414000,Hunan,China)Abstract:InordertostudythecharacteristicsofTriarrhenalutarioripariapopulationchangebeforeandaftermaiiagementinSouthDongtingLake,T.lutarioripariawastakenastheresearchobjectduringIheleaf-expansionperiodofbeforeand1yearafterlheexitmanagementintheSouthDongtingLake.Tliedynamicchangesoflivingplantheight,grounddiameter,density,andabove-groundbiomassoftheT.lutarioripariapopulationwerestudied.TheresultsshowedthattheaveragedensityoflivingplantsperunitareaofT.lutarioripanapopulationafterexitmanagementintheSouthDongtingLakewas13.68stems,ni'2,whichwassignificantlylowerthanthatofthemanagementplot.Theaverageheightoftheplantis1.86in,whichissignificantlyhigherthanlhemanagementplot.Theaveragegrounddiameteroftheplantis2.39cm,whichislessthanhemaiiagenientplot.Theratiooftheiiuniberofdeadplantstolivingplantsinlhe收稿日期:2019-12-24基金项目:湖南省重点研发项目(2019NK2021);湖南省林业科技创新专项湿地保护项目(湘财建指【2019】31号)作者简介:罗学卫(】969—),男.湖南省沅江市人,工程师,主要从事湿地保护和自然保护区管理研究工作;E-mail:69421()429@qq.com通讯作者:牛艳东,副研究员;E-mail:slsnys@163.comwithdrawnplotis1:1.21,theabove-groundbiomassperunitareadoesnotchangesigniGcantly,andtheabove-groundbiomassofnewly-addedlivingplantsdeclinessignificantly.Thestudyprovidesin】]x)rtantbasicdataforscientificevaluationoftheecologicaleffectsofT.huarioripariaexilfrommanagementonthesoilandwaterenvironment.Keywords:SouthDongtingI^ake;Triarrhenalutanoriparia;populationcharacteristics湿地是地球三大生态系统之一。作为陆地与水体的过渡地带,湿地被誉为“地球之肾”,在促进生物圈物质...