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1、聊城大学硕士学位论文量关系。关键词：东平湖；硅藻；形态磷；湖泊水质；营养状态；ii聊城大学硕士学位论文ABSTRACTDongpingLakeasthemainregulationoflakefortheeastlineofSouthtoNorthWaterDiversionProject,andthewatersourcefromWesttoEastinShandongprovince,itrolesimportantinwaterresourcesallocationstrategyinChina.BymonitoringDongpingLakeonthephysi
2、calandchemicalindicators,thewaterqualityandnutritionstatuswereanalyzedusingprincipalcomponentanalysisandcomprehensivenutritionstateindexmethod.Analyzedthesurfacesedimentphosphorusdistribution,identificationofsurfacesedimentdiatom,thedistributionfordiatoms,itrevealedtherelationshipbetween
3、diatomandwaterenvironmentstatus.Basedontheresearchabove,themainconclusionasfollowing:(1)Atotalof43diatomspeciesbelongingto16generawereindentifiedfromLakeDongpinginShangdongProvince,mainlyepiphyticandplanktonicspecies.Synedra,Fragilariahadcertaininstructionsignificanceforalowphosphoruscon
4、centrations(<100μg/L),thesespeciesoccupiescertainproportioninDongpingLake,soinsomeextentthatthecurrentstatusofDongpinglakehadnotreachedthelevelofeutrophication.(2)Fromthedistributionofdiatomspace,itcanbeseenthatsamplesweredividedintothreeareas.Iareaforthelakeperipherycageculturearea,Frag
5、ilaria,Synedraspeciesmainlysuitableforadequatelight,greatertransparencyofwaterandIIregionwithafisheatingPotamogetonmalaianusandotherbiologicalpopulations,itshowedthatthewaterqualitywasbetter,theaquaticwelldevelopedinthisarea.(3)Theoverallwaterqualityanalysisshowedthespringandsummerseason
6、swereinferiorV,autumnandwinterseasonswereIII.Eachsamplingpointwaterqualityanalysisshowed:DP1,DP2,DP3waterqualitywasgradeⅠ;DP11,DP14,DP15,DP16,DP20,DP21,DP30,DP32samplingpointswereacertaindistancefromtheregion,thewaterqualitywasIII.DP4-DP9,DP22-DP29regionwereIV,V.(4)Analysisofcomprehensiv
7、enutritionstateindexshowedDongpingLakewasnutritionalstatus,consistentedwiththediatomsspeciesdistributionrevealinglakenutrientstates.(5)Itcanbeseenfromthedistributioncharacteristicsofphosphorusforms:thephosphorusinsedimentsweremainlyinorganicphosphorus,inorganicphosphorusw
