简介：ThecommunitycharacteristicsofmangrovesintheFutianNatureReserve,Shenzhen,Chinaaregivenbasedonsurveyingof33quadratsin4transectswhichstretchfromthehighertidalzonetothelowertidalzone.Theresultsshowthatthereare6communitytypesinthisarea:Kandeliacardelassociation,Avicenniamarinaassociation,Aegicerascorniculatumassociation,Kardeliacardel+Aegicerascorniculatumassociation,Aegicerascorniculatum+KandeliacandelassociationandAcanthusilicifoliusassociation.Kandeliacandel,AegicerascorniculatumandAvicenniamarinadominatethetypicalquadrats.Kandeliacandelcanbeseenatalmostallquadrats,Aegicerascorniculatumdistributesmostlytowardtheestuaryandthehighertidalzone,Avicenniamarinadistributesmostlytowardthebayandthelowertidalzone,BruguieragymnorrhizaoccasionallyoccurstowardtheEstuarywithoneorseveralindividuals,Acanthusilicifoliuswascommontowardthehighertidalzone,asanaccompanyingspecies,Derristrifoliatawascommoninmanymaturequadrats.Totally,6speciesofmangroveplantsand3speciesofsemi-mangroveplantsappearinthisresearcharea.Fromthehighertidalzonetothelowertidalzone,theaveragediameterandbasalareaofmangrovetreesincreasegradually.Accordingtotheresults,theAvicenniamarinadominatesinaveragediameterandbasalarea,andtheAegicerascorniculatumtreesareonthecontrary.Fromthetransect1tothetransect4,theimportancevalueofAvicenniamarina,BruguieragymnorrhizaandKandeliacandeldecreases,andAegicerascorniculatumincreases.Inthisarea,theKandeliacandelpopulationandAegicerascorniculatumpopulationaredevelopingpopulationswithmanyseedlingsandsaplings,buttheAvicenniamarinapopulationisinamaturestagewithfewseedlingsandnotsomanytotalindividuals.Accordingtothisresearch,wesupposethatAegicerascorniculatumshouldbedevelopedtowardtheestuaryandtheAvicenniamarinaassociationshouldbeprotected.

简介：Thispaperreportstheabsorption,accumulation,distributionandcycleofCu,Pb,Zn,CrandNiinS.apetala+S.caseolaris,mangrovecommunityatFutianMangroveNatureReserveofShenzhen,TheCu,Pb,Zn,CrandNicontentsinforestsoilincreasefrombottomtosurfacelayers,andthestorageofthefiveheavymetalsinthesurfacelayer(depth0-30cm)isZn>Pb>Ni>Cr>Cu.TheconcentrationabilityisS.caseolaris>S.apetala>K.candel.TheexistingaccumulationofCu,Pb,Zn,CrandNiinthecommunityis23019.63μg/m^2,23429.66μg/m^2.177870.42μg/m^2,6835.80μg/m^2,and12995.22μg/m^2,respectively.Theannualabsorptionis6592.57μg/m^2,2664.80μg/m^2,23123.56μg/m^2,853.24μg/m^2,and1990.95μg/m^2,respectively.Theannualreturnis3179.50μg/m^2,1300.65μg/m^2,7401.31μg/m^2,398.99μg/m^2,and646.20μg/m^2respectively.TheannualnetretentionaccumulationofCu,Pb,Zn,CrandNiinthecommunityis3413.07μg/m^2,1364.15μg/m^2,15722.25μg/m^2,454.25μg/m^2,and1344.75μg/m^2,respectively,TheturnoverperiodsofCu,Pb,Zn,CrandNiare8,19,15,18and21years,respectively.