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INTRODUCTIONNandPinputtedintoJiaozhouBaybyriversandbysewageeffluentsofcities ,havemadetheBaybecomemoreandmoreeutrophicdaybyday .Shen ( 1994)thoughtthatphytoplanktongrowthwaslimitedbythechangefromnitrogentophosphorous ;andthatthesilicateconcentrationinJiaozh… 相似文献
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INTRODUCTIONFromthe1990’s,thescallop,C.farreri,culturedinthenorthernChinaSea,deterioratedinsize,healthandoutputbecauseofhighstockingdensities,shortageofnaturalfoodanddiseases.Massmortalityof50%-90%occurredinJiaozhouBay,Qingdao,andSishiliwanBay,Yantai,fromJulyto… 相似文献
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INTRODUCTIONJiaozhouBayisashallowsemi closedbaywithtotalareaofabout 40 0km2 andaveragewaterdepthof7m .Themaximumwaterdepthisover 5 0matthecenterofthestraitconnectingtotheYellowSea.Thisstraitcenterwateriscalledbaymouthwater,thewaterinthenorthernpartofthestrai… 相似文献
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IntroductionRemediationbynaturalattenuation (RNA)isthepreferredmethodforremediatinggroundwatercontami natedbythearomaticfuelhydrocarbons ,benzene ,toluene ,ethylbenzene ,andxylene (BTEX)etc .(Jef frey ,2 0 0 1) .ButtherearecertainconditionsunderwhichRNAisinadequate… 相似文献
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Fabric and crystal characteristics of Bohai and Arctic sea ice 总被引:1,自引:0,他引:1
1 IntroductionBohaione yeariceandAntarcticonehavethesimilarsurface featuresandcorre spondingfabricandcrystalcharacteristics (Allison 1 997;Lietal.1 997;Qin 1 991 ) .DuringtheChinaFirstArcticExpedition ,theresultsinthestudyofone yearicefromBohaiandAntarcticwereusedfo… 相似文献
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INTRODUCTIONPollutionofmarineecosystemposesaseriousthreattomarineorganismsandultimatelytheentireecosystem.Inrecentyears,organophosphorous(OP)pesticideshavelargelyreplacedorganochlorinepesticidesbecauseoftheirrapidbreakdowninwaterandtheirlowenvironmenta… 相似文献
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GUO Qingxia 《东北亚地学研究》2002,(2)
IntroductionXujiaweiziBaxin(XB)oilfieldissituatedinthesouthofDaqingoilfield .Thepayzone ,Putaohuare servoir ,whichiswithsand -shalese 相似文献
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TheBohaibaybasin ,locatedineastrenChina ,isconsideredasabigCenozoiccontinentalriftbasin .Thebasinpossessesdeeperfault -trouth ,goodconsistencyandhugeperspectiveforpetroleumandnaturalgasex ploitationinPalaeogeneandpre -Palaeogenesystems .Thestudyontectonicch… 相似文献
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IntroductionArchaefructus ,theoldestknownangiosperms ,werefoundfromtheUpperJurassicJianshangouFormation (i.e .theformerlowerpartofYi 相似文献
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Bivalveshavetranslucentthinmembranes—thegastricshieldcoversontheleftoftheposteriorstomachwalls;theheadofthecrystallinestylehousedinthestyle sacisrotatedforwardintothestomachtoimpingethefoodonthegastricshield (ZhangandTai,1 961 ) .Itwasreportedthatthegastric… 相似文献
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《大地测量与地球动力学》2002,(4)
The‘JournalofGeodesyandGeodynamics’(ItsoriginaltitlewasCrustalDeformationandEarthquake)isanacademicperiodicalmanagedbyInstituteofSeismology ,CSB(ChinaSeismo logicalBureau) ;No .1CrustalDeformationMonitoringCenter ,CSB ;ResearchCenterofGeo physicExploration ,C… 相似文献
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赵剑平 《中国地理科学(英文版)》1994,4(1):81-94
THECHINESEECOLOGICALRESEARCHNETWORKZhaoJianping(赵剑平)(BureauofResourcesandEnvironmentalSciences,theChineseAcademyofSciences,Be... 相似文献
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INTRODUCTIONThegenusPraebebaliawasestablishedbyRathbun ,1 91 1 .Itscarapaceisbroaderthanlongaslongasbroad ,orslightlylongerthanbroad ;theposteriorborderisusuallyarmedwithaspineortu bercleoneachside ,thehepaticandintestinalregionsaredistinctlyelevated ;thechel… 相似文献
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INTRODUCTIONTheJapaneseseabass (LateolabraxjaponicusC&V)distributeswidelyinthecoastalwatersalongtheBohaiSea ,YellowSea ,EastChinaSea,andSouthChinaSea .Asacarnivorousfish ,itoccupiesthehightrophiclevelinthemarineecosystemandhasadaptedtovariousenvironmentalr… 相似文献
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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
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INTRODUCTIONInthefirstpaperofthisseries (LiandLiu ,2 0 0 2 ) ,wereported 3generawith 7speciesofPontoniinae,collectedbytheJointChinese GermanMarineBiologyExpeditionstoHainanIsland(winterof1 990andspringof 1 992 ) .Thepresentpaperreportsanother 6genera ,with 9species,fromHa… 相似文献
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INTRODUCTIONPenaeusjaponicusisaneuroxybioticpenaeidprawn ,whosepropersalinityrangeforgrowthis2 0 -30andoptimalsalinityrangeis 2 5-30 (WangandLiu ,1 991 ;WangandYu ,1 999) .Ithasgreatosmoregulatiorycapacity (MantelandFamer,1 983) .Butitsbestenvironmentforreproductionanddevel… 相似文献
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PROBLEMSOFRESERVOIRSEDIMENTATIONINCHINAJiangNaisen(姜乃森)FuLingyan(傅玲燕)ChinaInstituteofWaterResourcesandHydropowerResearch,Beij... 相似文献
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Anja Strφmme 《极地研究(英文版)》2002,13(1)
1 TheincoherentscattertechniqueTheuseofincoherentscatterradarsasapowerfulground baseddiagnostictoolforstudyingthenear EarthspaceenvironmentbeganwiththefirsttheoreticalpredictionsbyGordon( 1 958) ,andthefirstobservationsbyBowles( 1 958)afewmonthslater .Thereares… 相似文献