global warming全球变暖对动物的影响.ppt

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1、Whereismyhome?Asthetemperaturerise,theearth‘spoles(极点)islandfatesnowmeltcanleadtorisingsealevels,manyislandswillbedrowned,someislandmaynotexist.Iceismelting!It’stimetorun!北极植物迁移2007年6月15日的《科学》杂志发表文章称，许多北极植物不断地开拓新的领地，这表明人类活动导致的全球变暖已经引起了植物生存气候条件的重新分布，北极植物的广泛迁移可能是该区域对于剧烈气候波动自然倾向进化的结果。美国山区植物“移民”疑与全

2、球气候变暖有关一项最新研究显示，美国加利福尼亚州南部山区有大量植物死亡，有些灭绝。另有9种植物生长范围海拔上升。专家认为这一现象或许与全球变暖有关。植物“移民”专家发现，位于较低海拔的树木和灌木大量死亡，而高海拔地区则林木繁盛。另类警告美国亚利桑那大学生态学家特拉维斯·赫克斯曼说，植物生长海拔高度上升速度远比科学家想象的快，这对人类是一个警告。SpeakerYaoChengTheEffectsOfGlobalWarmingOnAnimalsandplantsTableofContentsOne.IntroductionTwo.howglobalwarmingeffectanimals

3、andplantsThree.conclusionPartoneintroductionwhathaveIdone1.analyzed143scientificstudiesinvolvingatotalof1,473speciesofanimalsandplants.2.statisticalanalysesofall143studies.whatdidIfoundadirectcorrelationbetweenglobalwarmingandbiologicalchangesomewhere.globalwarmingis,infact,havingasignificanti

4、mpactonanimalandplantpopulations.Parttwohowglobalwarmingeffectanimalsorevenkillthem1.Extinction2.Habitatloss3.Ecologicalimbalance4.BiologicalrhythmExtinctionAreportfrom《Nature》saysglobalwarmingwillleadtotheworldaquarterofterrestrialwildlife(morethan100millionspecies)beextinctinthenext50years.T

5、hetreefroginMadagascarrainforestwilldisappearbecauseofglobalchangeSilverArrowGrassgrowinHawaiiisattheedgeofextinctionduetoglobalwarminghabitatlossAnExampleAboutPolarBearsealMigratingduetohabitatlossSomeanimalslikechipmunksandsquirrelswhichtendtoliveinthemountains,inthe1990s,nowwecanfindtheminso

6、mehills.EcologicalimbalanceNearAlaskasincethemid-1970s,about50%ofthenearly1millionacres(400,000hectares)ofmaturesprucetreessuccumbedKenaiPeninsulasprucebarkbeetleGlobalwarmingleadtoforestseatenbyalargenumbersofpestsbiologicalrhythmOuroverallanalysisofstudiesinvolvingtemperate-zonespeciesreveale

7、dthatspringtimeevents--suchasblooming,egglayingandtheendofhibernation--nowoccurabout5.1daysearlierperdecadeonaverage.Partthree:conclusionGlobalbiodiversityisavaluableassetworthbeingcherished.Butitisbeingdamagedbyglobalwarmingandin