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341020145ACTAECOLOGICASINICAVol.34No.10May2014http//.ecologica.cn20140101420130206012SFKZCX2-YW-Q06-22013-06-092014-04-17*Correspondingauthor.E-mailzhgx@neigae.ac.cnDOI10.5846/stxb201306091545..201434102663-2673.LiRRZhangGXZhangL.MultivariateanalysisoftherelationsbetweenphytoplanktonassemblagesandenvironmentalfactorsinChaganLakeWetland.ActaEcologicaSinica201434102663-2673.李然然1,2,章光新1,*,张蕾11.1301022.100049Cluster、MDS、RDAShannon、Pielou、Margalef201259、。1275535240.94%4636.22%2519.69%。39.85%36.19%21.33%70.84%。658.0×104/L>459.3×104/L8—10。pH、PO3-452.0mg/L16.0mg/L3.3PO3-40.045mg/L0.012mg/L3.8。Bray-Curtis。RDApH、TNBOD5、PO3-4BOD5。、、、、、BOD5。。β-。MultivariateanalysisoftherelationsbetweenphytoplanktonassemblagesandenvironmentalfactorsinChaganLakeWetlandLIRanran12ZHANGGuangxin1*ZHANGLei11KeyLaboratoryofWetlandEcologyandEnvironmentNortheastInstituteofGeographyandAgroecologyChineseAcademyofSciencesChangchun130102China2UniversityofChineseAcademyofSciencesBeijing100049ChinaAbstractThisstudyinvestigatedthebiodiversityandcommunitystructuresofphytoplanktonandtheirrelationswithenvironmentalfactorsinChaganLakeduringtheintermediateMayandrainyseasonSeptemberin2012.Combiningfieldinvestigationswithclusteranalysismulti-dimensionalscalingMDSanalysisandredundancyanalysisRDAandapplyingShannonPielouandMargalefindicesthestudyidentifiedatotalof127phytoplanktonspeciesbelongingto53generaand5phyla.Amongthesespecies52weremembersofBacillariophyta46Chlorophytaand25Cyanophytaaccountingfor40.94%36.22%and19.69%ofthetotalphytoplanktonspeciesrespectively.Intermsofalgalpopulationhttp//.ecologica.cndistributionintheintermediateseasonCyanophytawasthemostabundantphylumofplanktonicalgaeaccountingfor39.85%ofalgalpopulationfollowedbyBacillariophyta36.193%andChlorophyta21.33%whereasintherainyseasonChlorophyta70.84%wasthedominantphylum.ConsistingoftwoconnectedpartsthemainlakebodyandXinmiaowetlandChaganlakewasfoundtosustainsignificanttemporal-spatialvariationsofphytoplanktonpopulations.Theabundanceofphytoplanktonintheintermediateseasonaveraging658.0×104cells/Lwasconsiderablyhigherthanthatintherainyseasonaveraging459.3×104cells/L.Inbothseasonsphytoplanktonabundancewasfoundtobepositivelycorrelatedwithwatersalinityi.e.greatersalinitycoincidingwithhigherphytoplanktonpopulationsandnegativelyaffectedbypHandphosphatePO3-4concentrationintheintermediateseason.Ineitherseasontheabundanceofphytoplanktoninthemainlakewas8-10timesofthatinXinmiaowetland.Intheintermediateseasonsuchdiscrepancywascausedbydifferentsalinityandnutrientsinthesetwowaterbodiessalinityinthemainlake52.0mg/Lwas3.3timesofthatinXinmiaowetland16.0mg/LwhilstPO3-4inthemainlake0.045mg/Lwas3.8timesofitsconcentrationinXinmiaowetland.Intherainyseasontherewasnosignificantdifferenceinnutrientlevelsinthewholelakesowatersalinitywasthemainfactorsaffectingthedistributionofphytoplankton.InadditiontofieldinvestigationresultsclusterandMDSanalysesbasedonBray-CurtismeasuresofsimilarityalsoillustratedsignificantdiscrepancybetweenthemainlakeandXinmiaowetlandintermsofphytoplanktonabundance.RDAresultsindicatedthatintheintermediateseasonthekeyenvironmentalfactorsinfluencingthephytoplanktonassemblageswerepHtotalnitrogenTNandphosphatePO3-4whereassalinityphosphatePO3-4and5-daybiologicaloxygendemandBOD5werethekeyfactorsintherainyseason.Intheintermediateseasondominantphytoplanktongenerawerethosefavoringlowalkalinitylowphosphorusandhighnitrogenlevels.RainyseasonbenefittedgenerathatweremoretolerantalkalinitysalinityphosphorusandBOD5.Mostdominantgeneraindentifiedinthisstudyweremicro-phytoplanktoncommonintemperateclimateandcapableofrapidmultiplyingandfastgrowingthroughnutrientassimilationcouldformahigherabundanceinrichnutrients.Whenphytoplanktonwasusedasabio-indicatorinwaterqualityevaluationtheresultsrevealedthatwaterqualityinChaganLakewasinβ-moderately-pollutedcategory.KeyWordsenvironmentalfactorsphytoplanktonredundancyanalysisChaganLakewetland、、、、、、。、、1-2。、N、P。3-5。6-7。、RDA。11.1124°03'—24°34'E45°05'—45°30'N4.5℃415.4mm6—980%1400—2100mm1.5m。7—910—466234http//.ecologica.cn45—65—10。1.2201259131-3-12。——35km5km。2564μm0.3—0.5m“∞”3min100ml1—2mL1L10—15mL48h30mL4%。1Fig.1SamplingsitesinChaganLakewetland《》8《———、》90.1mLOlympusCX21400x210010。HI9828DO、pH、T、TDS1L《》GB3838—200211TN、PO3-4、CODMn、BOD5。1.3ShannonH'、MargalefD、PielouJDv1—412-135Y。H'=-∑Si=1NiNlog2NiN1D=S-1lnN2J=H'lnS3Dv=H'×J4Y=Ni/N×fi5NiiNfiiS。Y≥0.0214。SPSS16.0Bray-CurtisMDS。CANOCO4.5DCALGA0.8671.6513RDAMonteCarlo。pHlgx+1。0.8VIF20RDA15。Y≥0.02>2.5%>1%16-17。22.12012115.8—18.6℃、19.8—22.4℃pH566210http//.ecologica.cn7.8—8.87.1—8.0DO、BOD5CODMn。SiO3-SiTN、NO3-N、TP、PO4-P。1Table1EnvironmentalparametersintheintermediateandrainyseasoninChaganLakewetlandParametersIntermediateseasonMeanMinMaxRainyseasonMeanMinMaxtt-testPPvalueTemperature/℃17.3415.7718.6321.0719.822.42-12.060**Salinity/mg/L4421406003961904900.807pH8.27.88.87.67.18.06.336**Dissolvedoxygen/mg/L10.56.412.56.64.67.97.836**/mg/LChemicaloxygendemand9.73.314.612.56.916.1-2.204*/mg/L5-daybiochemicaloxygendemand3.641.804.651.950.692.655.362**
本文标题:查干湖湿地浮游植物与环境因子关系的多元分析
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