地球脉动_两极之间Planet_Earth_From_Ploe_to_Pole.ppt

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1、-FromPoletoPoleGroup2PlanetEarthNorth北极熊Polarbears.极昼Polarday北极苔原Arctictundra北美驯鹿caribouNotenoughenergyreachesgroundtoenabletreestogrow亚寒带针叶林Subarcticconiferous远东豹Amurleopards温带阔叶林temperatebroadleavesVariousbirds热带丛林jungle海豹Seals大白鲨Greatwhites海洋ocean雄帝

2、企鹅MaleEmperorPenguins极夜polarnightSouthRepresentativeCreaturesPolarday极昼It’smarch.AndlightreturnstohighArctic,aPolarbearstirsfromherden.Heremergencemarksthebeginningofspring.Andthelittlebearscometotheirmothertogetfood.Theirmotherthathasnoteatenfor5month

3、sandhaslosthalfherbodyweightconvertsthelastofherfatreservesintomilkforherbabies.Temperature-30.Thebabiesstillneedtoliveintheshelter.Thesunwilldissolvetheice,whichwillhinderthebeartohuntitsfood(seal).Nearlyhalfofthebabybearswilldieinthefirstyearinthebro

4、kenice.Polarbears北极熊Arctictundra北极苔原NorthernCanada’swildfrontierEveryyear3millionsofcariboumigrateacrosstheArctictundra(北极苔原）.Thisisthelongestoverlandmigrationmadebyanyanimal.Someherdstravelsover2000milesayearinsearchoffreshpastures.Thisisthelongestove

5、rlandmigrationmadebyanyanimal.Therearewolvesinhangerschemingtocatchthenewlyborncalves.Thestrategyisthatrunningdirecrlyattheherdtomaketheminpanicfirst,andthentrytocapturetheseparatedtheherd.Andnowit’seasiertotargetanindividual.caribou北美驯鹿Midsummerontund

6、raandthesundoesnotset.Astheselatitudesthesun’sraysareglancing.Andnotenoughoftheirenergyreachesthegroundtoenabletreestogrow.temperatebroadleaves温带阔叶林TheAmurleopard-therarestcatintheworld,syblolizethefragilityofournatureheritage.Thereareonly40Amurleopard

7、sleftinthewild.Andthatnumberisfalling.Thecatshasbeenpushedtotheveryedgeofextinctionbyhuntingandthedestructionoftheirhabitat.Amurleopards远东豹Allanimals,rareorcommon,ultimatelydependfortheirenergyonthesun.JungleInthetropicsthesun’sraysstriketheearthheadon

8、,sothejunglegrowssovigorouslyand supportssomuchlife.Thisforestcoversonly3percentoftheplanet’ssurface,butitcontainsmorethan50percentofallitsplantsandanimals.Thereare42differentspeciesofbirdsofparadiselivinginthegreatislandofNewGuinea,eac