水生生物专业

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1、TheAnalysisofEcosystemhealththeoryandevaluationmethodAbstractInthispaper，theemergenceanddevelopmentoftheecosystemhealththeory，someassessmentmethodsandindexestostudyecosystemhealthdegreeareprovided，anditspracticesongreenhouseecosysteminthecountryareintroducedalso．KeywordsEcosystemheal

2、th，Sustainabledevelopment．Ecosystemdegradation1.EcosystemhealththeoryformationanddevelopmentEcosystemhealthlearningisprotectionanewscienceinthefieldofenvironmental.Itreflectsecologicalsysteminternalorderandthewholesituationoforganization,hasbeenusedinmanyfieldformonitoringorevaluatio

3、noftheecologicalsystemandlandscapeconditionsandquality.InternationalSocietyofEcosystemHealth,ISEHisestablishedin1994.ItmarkedtheEcosystemHealthasanewbirthinthefieldofscienceandtechnology.TheoriginoftheconceptofEcosystemhealthcandatebacktotheearly1940s.in1941,thefamousecologists,lande

4、xpertsAldoLeopoldfirstdefinedlandhealthyandusethe“landdisease”describethelandfunctionaldisorder.In1942,TheNewZealandsoiltolearnpublishedamagazinecalled“SoilAndHealth”,activelyadvocatedorganicagriculture,putforward“healthysoil—healthyfood—person”.60~70s,withtheglobalecologicalenvironm

5、entdeterioration,ecologytorapiddevelopment.Inthe80s,peoplepaymoreandmoreattentiontotheecosystemofthestressmanagementproblem,in1984theUnitedStatesecologicaltolearntohostentitled"bornstressStatesystemdescriptionandmanagementofthewholemethod"seminar.1988SchaefferD.J.,discussedaboutecosy

6、stemhealthmeasureforthefirsttime,1989RapportD.J.discussedtheconnotationofecosystemhealth,betheforerunnerofecosystemhealthresearch.Forthedefinitionofecosystemhealththatcurrentlythereisnocommonwithpointofview.KarrJ.R.believethatifapotentialoftheecologicalsystemenoughtogainrealizationan

7、dstablecondition,interferencewithself-repairingability,theecosystemishealthy.SchaefferD.J.andthinkwhenEcologicalfunctionsofthesystemhavebeenoverthethresholdlimittheecologicalsystemishealthy(herethethresholdisdefinedas“Whenaftermorethancanmakewillthreatenecosystemscontinuetosend,thein

8、creaseoftheu