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1.
INTRODUCTIONAquiculturearearedtidesignalsoceanpollutionanddisaster.Althoughenvironmentscientistshaveconductedmanyin depthresearchesonthecauseandformationmechanismofredtide ,manyofitsaspectsarestillunknownbecauseredtideisacomplexphenomenonandtheecologic…  相似文献   

2.
INTRODUCTIONResearchesonsea floorhydrothermalactivitiesandhydrothermalsulfidesyieldedthenewestknowledgeaboutmodernmarinegeologicalevolutionandmineralizationpatterns.Sincethe 1 980s,scientistshavebeenapplyingtheoxygenisotopemethodtorecoverthenotdirectlyde…  相似文献   

3.
INTRODUCTIONInrecentyears,scientistspaidincreasingattentiontopolyploidybreedingofaquaticanimals.Studiesontriploidybreedingoffishandmolluschavemadenoticeableprogress.Therearereportsoflargescalecommercialcultureoftriploidsinducedinsomespecies.Thereported…  相似文献   

4.
INTRODUCTIONSuspendedsedimenttransportplaysanimportantroleinthecoastalenvironmentevolution.Thus,theobservationofsuspendedsedimentsisofinteresttocoastalscientists,engineers,conservationistsandplanners,intheiractivitiesofharbourconstruction,landreclamatio…  相似文献   

5.
INTRODUCTIONRedtidesoccurredinXiamenHarborin1986and1987.Thelocalmarinescientistscloselyobservedtheseredtidesandobtainedmuchusefuldata(Zhangetal.,1988;Du,1989;Zhuang,1991;Chengetal.,1993).Butsimultaneoustransientwatermovementalwaysmadeitdifficulttoinvestigatetheseredti…  相似文献   

6.
INTRODUCTIONJohannes (1 965)firstshowedtheimportanceofprotozoaasremineralizersinmarineenvironments.Thesignificanceofprotozoainthefreshwaterfoodwebhasbeenknownforthepast2 0years.Protozoaisamainpredatorofplanktonicbacteriaandphytoplankton ,andalsoafoodsourceo…  相似文献   

7.
DIMETHYLSULFIDE IN THE SOUTH CHINA SEA   总被引:1,自引:0,他引:1  
INTRODUCTIONGreateffortsweredevotedrecentlytostudyingdimethylsulfide(DMS)distributioninseawater,asitaccountsforthemajorpartofthesulfurfluxfromtheoceanstotheatmosphere.Moreover,itsoxidationproductsintheatmospheremayinfluenceenvironmentalacidificationand…  相似文献   

8.
1FRACTALTHEORYANDFLOODCALAMITIESThemostregulargeometricobjectswhichcouldbemeasuredbylengthsofspecificityaretheissueofclasica...  相似文献   

9.
INTRODUCTIONTheSouthChinaSea (SCS)isauniquesemi encloseddeepoceanbasinlocatednearthewest ernperipheryofthePacificOcean .Spreadingfromtheequatorto 2 0°Nandspanningzonallyabout1 5°N ,theSCSliesbetweentheSouthChinacoastandthemaritimecontinent.TheSCSbottomtopogr…  相似文献   

10.
DYNAMIC VARIATION OF NITROGEN CONTENT IN THE SECOND SONGHUA RIVER   总被引:1,自引:0,他引:1  
ThewaterpollutionintheSecondSonghuaRiverhasbeenpaidmuchattentiontoforalongtime.Manyenvironmentalscientistshavedonealotofresearchworkonit,butmostofresearchcontentsweretofocusonheavymetalpollutionandorganicpollutioninwater,andlittleaboutnitrogen(Fuet…  相似文献   

11.
INTRODUCTIONTheBohaiSea,analmost closedshallowsea,liesnorthwesttotheYellowSea.Fig.1ashowsthege ometryoftheshorelineandthewaterdepthdistributionoftheBohaiSea,whichissmallandshallowcom paredwiththeYellowSeaortheEastChinaSea.Themeandepthislessthan 2 0meters.Be…  相似文献   

12.
INTRODUCTIONTheSouthChinaSea(SCS)isapartly enclosedoceanbasinoverlaidbyapronouncedmonsoonsurfacewind .Paststudies (Chenetal.,1 991 ;DingandMurakami,1 994 ;Yan ,1 997;LiangBiqi,1 991 ;LiangJianyin ,1 991 )indicatethatahugewarmwaterpooljointlycontributedbythewesternPacific ,ea…  相似文献   

13.
THERECENTECONOMICDEVELOPMENTOFCHINA'S'MILLION'CITIESNingYuemin(宁越敏)(TheInstituteofWestEuropeanandNorthAmericanGeography,EastC...  相似文献   

14.
INTRODUCTIONPeopleshowedgreatinterestsinmicroalgaeduetotheirgoodcharacteristics,suchashigheffi ciencyofusingsolarenergy,smallsize ,nutritionalvalue ,rapidgrowthandmultiplicationrate .Mi croalgaehaveanimportantroleinmaricultureasfoodforlarvalstagesofcrusta…  相似文献   

15.
INTRODUCTIONThelargeyellowcroakerPseudosciaenacroceaoncewasoneofthefourimportantmarinefish eryobjectsinChina (Hongetal.,1 983;HuangandCarl,1 983;ChenandGong ,1 983) .TheproductionofthewildP .croceain 1 974reached 1 971 78metrictons (MT)inChina (Li,1 998) .Becauseofoverfishing ,th…  相似文献   

16.
INTRODUCTIONBillard ( 1 986)studiedthespermatozoonultrastructuresinteleostsandfounddistinctdifferencesa mongdifferentspecies.Studyonspermatozoonmorphologyandfunctionisachallengebecauseofthesperm’sspecialenvironment (Gageetal.,1 998;WangandZhang,1 999) .Sinceleft ey…  相似文献   

17.
INTRODUCTIONTheeffectsofhumanactivitiesonshorelineprocesseshavebeenconsiderable,particularlyoverthelastcentury.Themostsignificanteffectsarethosefromharbourconstructionandrivermouthtrainingwall.Inmanyinstances,majorinterruptionoflittoraldriftresultedfro…  相似文献   

18.
(张柏)THESTRUCTUREANDDYNAMICSOFTHELANDRESOURCESSYSTEMINTHEFARMLANDSHELTERFORESTREGIONINTHENORTHEASTPLAIN¥ZhangBai(ChangchunInst...  相似文献   

19.
INTRODUCTIONItisrecognizedthattherearetwoimportantprocessesthataffectthematerialfluxesintheEastChinaSea(ECS):oneisthematerialtransportprocessesrelatedtothefinematerial(modern)sedimentatthecenteroftheECSColdEddy,andtheotheristhesuspendedmatter(SM)fluxfrom…  相似文献   

20.
1 ADVANCINGOFTHEQUESTIONANDCONSTRUCTIONBACKGROUNDOFSUZHOUINDUSTRYGARDENPerroxgavespecialattentiontotheeffectofimportantitemsandconstructionofinfrastructurewhenhediscussedtheproductionofgrowthpole(Li,1988).Lotsofdomesticscholarshavealsoprobedintothi…  相似文献   

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