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简介：西藏的高原是在中国的最重要的生态的障碍之一。解决统治在地区性的植被和气候变化之间的协会的内部关系和动力学是重要的理解并且保护地区性的生态系统。从2001～2010基于植被，温度和西藏的高原的降水数据，我们在过去的10年分析植被盖子的空间、时间的变化并且用实验直角的功能和单个值分解讨论植被反应到气候变化。我们的结果揭示下列：(1)植被盖子逐渐地从东南减少到西藏的高原的西北；(2)植被盖子在过去的10年在西藏的高原上增加了，主要在中央、东方的地区；并且(3)一种重要积极关系在在中央、南部的地区在全部区域并且与降水种季节和温度期间在植被盖子之间被建议。

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简介：通过magnetostratigraphy的全面研究和在东北西藏的高原的几盆的sedimentology，我们表明学习区域主要经历了六构造高举在约52妈，的阶段34-30妈，24-20妈，16-12妈，8-6妈，和3.6-2.6妈。从Qaidam，Linxia，Xining，和西方Jiuquan盆的花粉集合的全面分析证明东北西藏的高原在植被类型和气候经历了六个主要变化：为温暖潮湿的森林植被的50-40妈，为温暖干旱、适度干旱的森林大草原植被的40-23妈，为温暖潮湿、适度潮湿的森林植被的23-18.6妈，为温暖潮湿、凉爽潮湿的森林大草原植被的18.6-8.5妈，为适度的亚humid无树平原大草原植被的8.6-5妈，并且为寒冷干旱的大草原植被的5-1.8妈。全面比较构造高举从沉积记录，从花粉推断的气候的变化，和全球气候变化推断的事件在东北西藏的高原显示出那在在低高度的Paleogene的气候被全球气候变化主要控制，当在晚第三纪，有山和盆的高高度风景的间隔是更多，这由高度和形态学控制了时。

简介：Detailedstudiesofpetrology,palaeocurrentdirection,paiaeogeomorphologyandpalaeohydrody-namicshavebeenconductedforthePermian-TriassicCangfanggouGroupintheforedeepoftheBogdaMountainsinthesoutheasternJunggarBasin,Xinjiang.Sedimentaryenvironmentsandfadesofalluvialfansandpebblybraidedrivers,sandybraidedrivers,meanderingrivers,low-sinuosityrivers,swampsandfresh-waterlakesarerecognizedinthegroup.Climateandtectonicsofsourceareasstronglycontrolledtheevolutionofthesedimentaryenvironmentsandfaciesintheforedeep.TheblockfaultingintheBogdaMountainsincreasedthegroundslope,whichledtoadrasticincreaseinthegrainsizeofthesediments.Humidclimate,beingbeneficialtoplantgrowth,wouldprovideprotectionofchannelbanksandatthesametimeweakenchemicalweatheringinthesourcearea,thuslargeamountsofclaymaterialsareavailablefortheformationofclayplugs.Asaresult,stablebanksandmeanderingriverbeltsare

简介：Weusedmatchedfilter,spectrumanalysis,andcontinuationmethodsofpotentialfieldfordataprocessingandobtainedthegeomagneticfielddistributionaboutthecontinentandcontinentalmargininsoutheastChina.Onthebasisofgriddata,inversionwasconductedandmagneticfielddistributionandmagneticstructureonbeddingofdifferentdepthswereobtained.Thenewresultsshowthat:1.ThemagneticfieldcharacteristicsarelargelydifferentinhorizontalandverticaldirectionsandtheycanbedividedintozonesaccordingtothecontinentalblocksofYangtze,Cathaysia,Kangdian(Sichuan-Yunnan)andQinling-Dabie.2.TheTanlufaultextendssouthwardalongtheGanjiangfaultandtheWuchuan-SihuifaultafteritcrossedovertheYangtzeRiverandwasoffsetlocallyintheeast-westdirection.TheTanlufaultfinallyslipsintotheSouthChinaSeaatHainanIsland.3.TheboundarybetweenYangtzeandCathaysiablocksstartsfromHangzhouBayintheeast,extendsalongJiangshaofaultandpassesthroughNanchang,Changsha,andGuilin,andfinallyenterstheseaatQinzhou,Guangxi.4.Thedistributionofburiedstructurezoneislocatedat24.5°-26°N.

简介：<正>Salinityisanimportantfactorcontrollingthemicrobialdistributioninlakes.Howeverlittleisknownabouthowmicrobialcommunitiesevolveinresponsetosalinityvariation.Inthisstudy,weinvestigatedthemicrobial

简介：ThecharacteristicsoftheTriassicsequencesdevelopedintheLowerYangtzeareadisplaysomegreatchangesinbothenvironmentandclimate.Thechangeofenvironmentwasatransitionfrommarinetocontinentviaalternatingenvironments.Thechangeofclimatewasatransitionfromtropic(torrid)towarmandwetclimateviasubtropicdryclimate.Thetypevariationsofthesequenceswerefromthemarinesequencestothecontinentalsequences,correspondingtothechangesofenvironmentsandclimates.Sequence1isatypeⅡofsequenceofmixedclasticandcarbonatesediments;sequence2isatypeⅠofsequenceofcarbonateplatform;sequence3isatypeⅠofsequenceofcarbonatetidalflat-saltlagoon,sequence4isatypeⅡofsequenceoflacustrinewithinmarinelayers,andsequence5isasequenceoflacustrine-swamp.Thedevelopment,distributionandpreservationofthosesequencesrevealthetectoniccontrolsandtheirchangesinthebackground.ThecollisionbetweentheYangtzeplateandtheNorthChinaplatewasagreatgeologicaleventinthegeologicalhistory,butthetimingofthecollisionisstilldisputed.However,thecharacteristicsofTriassicsequencestratigraphyandsealevelchangesintheLowerYangtzearearespondedtothiscoliision.ThecollisionstartedatthebeginningofmiddleTriassicandthegreatregressionintheLowerYangtzeareastarted22Maearlierthanthoseintheworld.Thetectonicconditionsoccurredbeforeandduringthecollisioncontrolledthedevelopmentofsequencesandtypechanges.

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简介：Haveyoueverseenscientistslisteningattentivelytoresearchtalkswhilstsitting,standingorlyingonthesand?Well-knownscientificpersonalitiespresentingtheirresultsonanimprovisedblackboardleaningagainstafour-wheeldrivevehicle,oranacaciatree(weavoidedcamelswhichdefinitivelymovetoomuch)?Ifnot,youshouldhavetakenparttothefirstofsixinternationalmeetingson“RapidandcatastrophicenvironmentalchangesintheHoloceneandhumanresponse”.ThisconferencewasheldinMauritaniafrom4to18January2004,withthefirstweekalongthecoastoftheNatureParkofBancd'ArguinandthesecondoneontheAdrarplateau.Inattendancewere29participantsfrom17countrieswhoweredrawntheretoexamineinthefieldvariousphenomenalinkedtothethemeofthemeeting,

简介：<正>1IntroductionVirusesarethemostabundantbiologicalentitiesonEarth.Theycaninfluencethesuccessionofindividualmicrobialpopulations,biogeochemicalcyclesofC/Nand,ultimately,microbialcommunitystructurethroughkilling

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