预览加载中，请您耐心等待几秒...

富营养湖泊中轮虫群落结构季节变化的环境驱动力研究(英文).docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

富营养湖泊中轮虫群落结构季节变化的环境驱动力研究(英文) SeasonalVariationintheCommunityStructureofRotifersinEutrophicLakes:EnvironmentalDrivers Introduction Eutrophicationoflakeshasbecomeamajorenvironmentalissueworldwide.Theexcessivenutrientinputpromotesthegrowthofalgaeandleadstotheformationofharmfulalgalblooms,whichcanhavenegativeimpactsonwaterqualityandaquaticorganisms.Rotifersareanimportantcomponentofzooplanktoninlakesandcanplayacrucialroleincontrollingtheabundanceofalgae.Investigationsonthecommunitystructureofrotifersineutrophiclakescanprovideinsightsintohowtheyrespondtotheenvironmentalfactorsthatregulatetheirgrowth. MaterialsandMethods Inthisstudy,wesampledrotifersinaeutrophiclakeinChinaoverfourseasons(spring,summer,autumn,andwinter)from2018to2019.Atotalof24sampleswerecollectedusingaverticalwatersampleratthreedepths(0m,3m,and6m).Therotifersweresortedandidentifiedtothegenuslevelusingamicroscope.Inaddition,physicochemicalparametersofthelake,suchastemperature,pH,dissolvedoxygen,andnutrientcontents,weremeasuredsimultaneously. Results Atotalof34rotifergenerawereidentifiedduringthestudyperiod,withthedominantgenerabeingBrachionus,Keratella,andPolyarthra.Therotiferabundancewashighestinsummerandautumnandlowestinwinter.Thecommunitystructureofrotifersshoweddistinctdifferencesamongtheseasons,withthespringandwintercommunitiesbeingmorediversethanthoseinsummerandautumn.Theprincipalcomponentanalysisrevealedthattemperatureandnutrientcontentwerethemainenvironmentaldriversoftheseasonalvariationinthecommunitystructureofrotifers. Discussion Thehigherrotiferabundanceinsummerandautumncouldbeattributedtothehighertemperatureandnutrientcontent,whichprovidedfavorableconditionsfortheirgrowth.Thelowerrotiferabundanceinwintercouldbeduetothelowtemperatureandnutrientcontent,whichmayhavelimitedtheirreproduction.Thehigherdiversityofrotifersinspringandwintermaybeduetothelowercompetitionpressurefromotherzooplanktonspeciesduringthoseseasons.Theenvironmentaldriversofrotifercommunitystructureineutrophiclakeswerefoundtobeconsi