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ID:28836275
大小:59.50 KB
页数:10页
时间:2018-12-14
《第九集 桧木森林的共生现象.doc》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第九集檜木森林的共生現象大片頭30”ForestStoryofTaiwanWithintheforestitisactuallynotasquietasthenakedeyeseesitOrganismsbothdependonandcompetewithoneanotherforsurvivalThisisYuanyangLakeNatureReserve//situatedon110ForestRoadofftheNorthernHorizontalHighwayAsthetoweringcypresstre
2、esstrivetosurviveatthesametimemanyorganismsarealsoquietlyandpassively//markingtheirownterritorieswithintheforest小片頭:片名字幕:SymbiosisWithintheCypressForestSituatedat1670metresabovesealevelbeinginfluencedbyitstopographyandthenorth-easterlymonsoonYuanyangLakehasah
3、ighlevelofprecipitationandhumidityItalsopossessesavastareaofnaturalandstructurallycomplete//yellowcypress(扁柏)forestAsrainfallsrainwaterwillpassthroughthecypress’canopyleavesandbranchesandfinallypenetrateintothesoilAsrainfallstopsthebottomlayeroftheforestbegin
4、stostirTurningoverapieceoffallenleafasnailisslowlymovingaroundTheforest’shumidanddimenvironment//isafavouritehabitatforsnailsWithintheforestplantswhichcannotsurviveontheirownwillliveoffothertreesThehumidenvironmentofthecypressforest//hasprovidedasuitablehabit
5、atforthegrowthofmanyinvertebratesIthasalsonurturedmanyepiphytes//astheyliveonothertreestoobtainnutrientsManyfernandorchidaceaeplantsarecommonexamplesofplantswhichliveontreetrunksandbranchesforsurvivalandgrowthTobedefinedasanepiphytefirstlytheplanthastobeonewh
6、ichlivesonatree//anddoesnottouchthegroundandsecondlyisthatitdoesnotextractnutrientsfromitshostOntheotherhandparasiticplantsaredifferentinthat//theywillextractnutrientsfromtheirhostsThereforewhileepiphytesneedtoevolve//sothattheycanproducetheirownnutrientsforg
7、rowththisisnotnecessaryinthecaseofparasiticplantsbecausesomeofthemwillgrowrootsdeepintothebark//oftheirhosttreestodrawandabsorbnutrientsThisisthebiggestdifferencebetweenthetwoOnaglobalscaleepiphyticplantsaremainlydistributedintropicalandsubtropicalrainforests
8、aswellasfogforests(霧林)inmountainregionsSincetheirhabitatisafoggyandrainyenvironmenttheycaneasilyobtainsufficientamountsofwaterandnutrientsBecauseofTaiwan’srelativelyhighlevelofhumiditythe
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