珊瑚礁完全介绍英文版ppt课件

Thecolorfulcoralreefs,1,Theformationofcoralreefs,CoralisoneoftheMarinecoelenterates,whichfeedonpreyontheoceantinyplankton,canabsorbthecalciuminthewaterandcarbondioxideinthegrowthprocess,andthensecretelimestone,intohisshellofsurvival.Everysinglecoralonlythegrainsize,theyareagroupofagrouptogathertogether,thegenerationsmetabolism,growth,reproductionandcontinuouslysecretelimestone,andtogether.Thelimestoneafteraftercompaction,petrochemical,formingislandsandreefs,knownascoralreefs.,2,Coralsarebiological,cnidariadoor,includedanimalssuchasjellyfish,polyps,softcoralandseaanemones.Coralreefs,ismadeupofstonecoralspurposecoralskeletons.Thebonesofmaincomponentiscalciumcarbonate(CaCO3).,3,Theclassificationofthecoral,Accordingtothepresenceofsymbioticalgaecanbedividedinto:Aclassofreef-buildingcoralsaresymbioticalgae,livinginshallowareasofthesunshine;Anotherkindisnoalgaesymbiosisofreef-buildingcorals,liveinthedeepsea.,4,Theclassificationofthecoralreefs,Accordingtoformdivisionare:fringingreef(fringingreef),thebarrierreefandreefatoll,tableandsometransitiontype,瑚礁的分类,5,Fringingreef,6,Barrierreef,Barrierreefisalsocalledthebarrierreef,likelongbeach,aroundtheoutsideofthefartheroffshore,andseparatedbyawideshallowseasandcoast,orthroughaknownasthewatersofthelagoon.SuchasAustraliasGreatBarrierReef,7,atoll,AccordingtothesettlementofDarwinstheory,themajorityofcoralreefsisthroughvolcanicactivityintobasaltformedislanddevelopment,duetofallingoftheland(orsearise)andformatoll.,8,TheformationoftheGreatBarrierReef,Coralpostureisexquisite,colorandlusterisbeautiful,canonlyliveintheyearkeepin22to28degreesofwater,watertemperatureandwatermustbecleanandtransparent.Australiasnortheastcoastoutercontinentalshelfwatersaretheidealconditionsofreproductivecoralpolyps.Coralreefbuildingprocessisveryslow,inthebestcondition,thethickeningofthereefbodyeveryyearbut3-4cm.Somerockthicknesshasamountedtohundredsofmeters,explainthearchitectherehasgonethroughalongtime.AtthesametimealsoshowsthatAustraliasnortheastcoastonthegeologichistoryofsubsidenceprocess,hasexperiencedthepursuitofsunandfoodcoralgrowthup.,9,TheGreatBarrierReefformationYuZhongxinperiod,morethan25millionyearsofhistory.Itsareaisstillexpanding.Itisafterthelasticeage,searosetothepositionafterayearsnow.TheGreatBarrierReefonearthisthemostbeautifuldecorations,likeashiningskyblue,indigo,blueandpurewhitelight,eveniftolookonthemoonisalsoclearlyvisible.,10,Thecolorfulcoral,InthegroupoftheGreatBarrierReef,colorfulcoralreefshavered,pink,green,purple,yellow.Theirshapedifferences,withantlers,ganodermalucidum,lotusleaf,seaweedinthesea-floorspreadingthebeautyofthebody.Thisdistributionofmorethan400differenttypesofcoralreefs,includingtheworldslargestcoralreef.,11,12,13,雀鲷鱼,蝴蝶鱼,天使鱼,14,海葵,海蜇,15,AustraliasGreatBarrierReefisthenatureofthecreatedamiracle.However,ourchildrenmayneverseethismiracle.OceanographersCharlieOolongaccordingtoareportreleasedrecently,theglobalclimatewarmingwilllettheGreatBarrierReefinashortspanof20yearstimetheworldher