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简介：Thedynamicsofrhizospheremicrobialcommunitiesisimportantforplanthealthandproductivity,andcanbeinfluencedbysoiltype,plantspeciesorgenotype,andplantgrowthstage.ApotexperimentwascarriedouttoexaminethedynamicsofmicrobialcommunitiesintherhizosphereoftwosoybeangenotypesgrowninablacksoilinNortheastChinawithalonghistoryofsoybeancultivation.Thetwosoybeangenotypes,Beifeng11andHai9731,differinginproductivityweregrowninamixtureofblacksoilandsiliceoussand.Thebacterialcommunitieswerecomparedatthreezonelocationsincludingrhizoplane,rhizosphere,andbulksoilatthethirdnode(V3),earlyflowering(R1),andearlypod(R3)stagesusingpolymerasechainreaction-denaturinggradientgelelectrophoresis(PCR-DGGE)of16SrDNA.Theresultsofprincipalcomponentanalyses(PCA)showedthatthebacterialcommunitystructurechangedwithgrowthstage.Spatially,thebacterialcommunitiesintherhizoplaneandrhizosphereweresignificantlydifferentfromthoseinthebulksoil.Nevertheless,thebacterialcommunitiesintherhizoplaneweredistinctfromthoseintherhizosphereattheV3stage,whilenoobviousdifferenceswerefoundattheR1andR3stages.Forthetwogenotypes,thebacterialcommunitystructurewassimilarattheV3stage,butdifferedattheR1andR3stages.Inotherwords,somebacterialpopulationsbecamedominantandsomeothersrecessiveatthetwolaterstages,whichcontributedtothevariationofthebacterialcommunitybetweenthetwogenotypes.Theseresultssuggestthatsoybeanplantscanmodifytherhizospherebacterialcommunitiesintheblacksoil,andthereexistedgenotype-specificbacterialpopulationsintherhizosphere,whichmayberelatedtosoybeanproductivity.

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简介：Thedynamicmicrocosmswereusedtoevaluatetheeffectofoilspillsonmicrobialecologicalsysteminmarinesedimentandtheenhancementofnutrientontheoilremoval.ThefunctionandstructureofmicrobialcommunitycausedbytheoilpollutionandphosphatedosageweresimultaneouslymonitoredbydehydrogenaseactivityassayandPCR-denaturinggradientgelelectrophoresis(DGGE)techniques.Theresultsindicatedthattheamountoftotalbacteriainalldynamicmicrocosmsdeclinedrapidlywithincubationtime.Thenumberofpetroleum-degradingbacteriaandtheactivityofsedimentdehydrogenaseweregraduallyenhancedbypetroleumintheoil-treatedmicrocosms,whiletheybothshowednoobviousresponsetophosphatedosage.Incomparison,phosphatespikedheterotrophicbacteriaandtheyshowedasignificantincreaseinamount.DGGEprofilesindicatedthatpetroleumdosagegreatlychangedcommunitystructure,andthebacteriabelongedtoclassDeltaproteobacteria,andphylaBacteroidetesandChlorobiwereenriched.Thisstudydemonstratedthatpetroleuminputgreatlyimpactedthemicrobialcommunitystructureandconsequentlythemarinesedimentpetroleum-degradingactivitywasenhanced.Phosphatedosagewouldmultiplyheterotrophicbacteriabutnotsignificantlyenhancethepetroleumdegradation.

简介：植物，昆虫和25个森林社区的森林结构在Mao'ershan试验性的福雷斯特农场和Liangshui被调查试验性的福雷斯特农场在1994鈥?期间995。纸把连续统索引(Ci)用作一个参数，到份量上描述森林社区继任舞台。在生物多样性和森林社区的连续统索引之间的关系被学习。在森林植物社区的年度种类和家庭差异与连续统索引显示出非线性的关联，并且最大的差异在继任的中间的阶段期间。全部的昆虫社区和食草的昆虫组的差异是否定地相关的withCi，spide组和寄生昆虫组的断然被联系。模式差异和范围重量差异索引叶子高度与连续统索引增加了。

简介：Foryearssufferingfromhypertension,Mrs.Zhang,nowinher60s,isafrequentvisitortoBeijingDewaiCommunityHospitalinherneighborhood.'Ifeeltoopainstakingtogotoa'bighos-pital,''shesays.'Busesarealwaysovercrowdedandslow,notsuitableforpeoplelikeme.Besides,community-basedmedicalinstitutionschargelessfortreatmentofthesamediseases.'InChina,a'bighospital'isamedicalinstitutionlargeinsizeandfullyequipped,inmanycasesstaffedbysomeofthemostreputedmedicalexpertslocallyornationwide.Meanwhile,community-basedhospitalsandclinicsareoftenreferredtoas'smallhospitals.'

简介：RespectedMr.JiBingxuan,Vice-ChairmanofNPC,RespectedMr.KumarNepal,formerPrimeMinisterofNepal,RespectedMr.LiuGuozhong,GovernorofShaanxiProvince,Dearguests,ladiesandgentlemen,friends.

简介：Fourvegetationtypes,namelyconiferousandbroadleavedmixedforest,secondarydeciduousbroadleavedforest,openshrubsandmeadow,withdwarfbamboo(Indocalamuswilsoni)arecomparedontheirfloristiccomposition,lifeform,communitystructure,andsurvivorshipofbamboos.Disturbanceofconifer-loggingtwodecadesagopromotedthespeciesdi-versity,butnegativelyinfluencedthesurvivorshipofdwarfbamboowhichisdominateontheforestfloor.Openshrubsbearmorespeciesdiversityandmoregeophytesinitslife-formspectrumthanitsbackgroundvegetationsubalpinemeadow,how-ever,dwarfbambooisgrowingmuchbetterintheopenshrubsthaninthemeadow.Itseemsdwarfbambooprobablyfavor-itestooccurinthevegetationatgentleslopeswithamediatecanopycover.Itsmassfloweringinthesecondarydeciduousforestsuggeststhatasimultaneousfloweringandfollowingdiebackmaybeirruptintherecentlycomingyearsoverthesubal-pineShennongjiainChina,whichwillbenotonlyalterthefloristiccompositionandcommunitystructureoftheoldbamboostands,butalsoinfluencethesurvivorshipofthisrarespecies.

简介：Arthropodensyninclusions在晚始新世Rovno琥珀用2被检验揭示部件组的关联(某taxa双翅目，蚂蚁，蚜虫，和螨)古老的琥珀森林里的biocoenotic关系据说指示。三紧相关组们被识别，代表一个通常认为的天线浮游生物行业协会(Chironomidae+Ceratopogonidae)和二个树干行业协会，(Dolichopodidae+Germaraphis)其一个可能比其它被连接到开的更多或/并且更多的生活在水中或湿地的产地，Sciara地区双翅目的+Acorusrhombeus)。蚂蚁没与任何上述部件被连接。

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简介：镰刀霉poae传播和真菌的社区作文上的Tyrophagusputrescentiae的效果在nonsterile大麦谷物被学习。实验包括了后面的处理：没有螨，控制大麦；没有preincubation，在F上包含10或50螨的大麦。poae(Tp10和Tp50)；在F上在preincubation以后包含10或50螨的大麦。poae(FTp10和FTp50)。螨的数字，F的成功的转移。在真菌的社区的poae，和变化在实验的21d以后被检验。deoxynivalenol的增加(穿上)在大麦的内容被选择为成功的F的一个标准。poae转移。T的preincubation。F上的putrescentiae。poae增加了分别地为FTp10和FTp50近似穿上水平到谷物的800和300g/kg。T。在FTp10的putrescentiae人口生长比在Tp10低，当没有差别在FTp50和Tp50之间被发现时。真菌的社区被扩大比较，它的碎片，和运作的分类单位(OTU)克隆并且定序分析。OTU分析没支持F的转移。经由螨的poae。从分析克隆，仅仅，13克隆与F聚类的序列。在在距离水平0.07点定义的OTU的poae。相关克隆从FTp10，Tp10，Tp50和控制处理，然而并非从FTp50发源。然而，F的存在。在FTp50的poae被PCR扩大与特定的教材证实。观察可以被螨人口密度的不同效果解释，也就是说在高密度，(FTp50处理)真菌被过度放牧，当更低的人口密度(FTp10)支持了F时。poae转移。

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简介：TheimportanceofthelocaleconomyofthedevelopmentoftourismresourcesinChina'srelativelyunder-developedminorityareasisalreadycommonknowledgeinacademicandbusinesscircles.However,it'snecessarytoresearchmoreonspecificpatternsoftourismdevelopmentintheseethnicminorityareas.ThispaperstudiesWulongStockadeinBeichuanCountyinSichuanProvinceandexaminesthedistinctiveexperienceofthelocalQiangcom-munityaboutdevelopinglocaltourismresourcesandthelocalfundingofthedevelopment.Itnoteshowtheintroduc-tionofnewre-afforestationlawsof1999affectedthetraditional,agriculture-basedeconomyandhowamemberofthecommunitywasakeymotivatorininitiatingtourismasaneweconomicresource.IthasalsoexploredchangesintheeconomicconditionsofQiangpeasantssincetourismbeganinWulongStockade,wherelocalincomeshaveincreasedconsiderably.ThispaperfocusesonacharacteristicQiangareainthemountainsofwesternSichuan,demonstratesthenecessityandfeasibilityofcommunitytourismdevelopment,andsuggeststhatotherethnicminor-itymountainvillagesinruralareasdrawlessonsfromWulongStockade'sexperience.

简介：EntrustedtobyShijiazhuangmunicipalPartycommitteeandgovernment,ShanghaiTongjiUniversityfin-ished“TheGeneralPlanningofEcologicalDevelopmentProjectofHutuoRiverinShijiazhuangCity”.ItaimstobuildHutuoRiverintoawind-breakingandsand-fixingbarrierandecologicalprotectdistrictinthenorthofShijiazhuangbasedontherecoveryofnaturalecologytoimprovetheenvironmentofShijiazhuangcity.Italsointendstodevelopthedistrictlightlyandbuilditintoanaturebeautyspotandbigpark.Aftertheconstructionforseveralyears,thegeneralenvironmentofthisdistricthasbeengreatlyimproved.Butduringthedevelopment,theman-madelandscapesarehighlightedexcessively,whichdeviatesfromtheconstructionofnaturelandscape.Thecurrencyofconstructingbigleisureparkgraduallycomesintobeing,sotherecoveryofnatureecologicalisslow.So,thispaperintendstomaketheorientationtoecologicaldevelopmentofHutuoRiverinShijiazhuangcityandputsforwardthecommunityparticipationtopromotethefuturedevelopmentofecotourisminShijiazhuang.

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简介：ThefloraandcommunityphysiognomyofdegradedplantationecosystemsonpurplesoilwereinvestigatedinNinghuaCountyofFujianProvince,Chinatounderstandtherelationshipbetweenplantdiversityandecosystemprocesses..Fourdifferentrestorationcommunities(labeledasecologicalrestorationtreatmentI,II,IllandIV)wereselectedbyspace-timereplacementmethodaccordingtotheerosionintensityindegradedpurplesoilecosystem.Theresultsshowedthatthereweretotally86plantspeciesbelongingto78generaand43familiesinthedegradedpurplesoilecosystem.Ofthe15typesofdistributionareainspermatophytegenus,12typeswerefoundinthepurplesoilecosystem.Alongrestorationgradientfromlowtohigh,plantgrowthtypeandlifeformspectrabecameabundantmoreandmore,andthespermatophytegeneraforeachdistributionareatypeandgeneranumbersfordifferentfoliagecharactersincreasedaswell.Itisconcludedthattheplantfloraandphysiognomyinecologicalrestorationprocessbecomemorecomplexanddiverse,indicatingthattheforestecosystemonpurplesoiltendstobemorestable.