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1、2015年1月高三英语限时训练NewgeneticanalysishasrevealedthatmanyAmazontreespeciesarelikelytosurvivehuman-madeclimatewarminginthecomingcentury,contrarytopreviousfindingsthattemperatureincreaseswouldcausethemtodieout.Astudy,36inthelatesteditionofEcologyandEvolution,revealsthe37ageofso
2、meAmazoniantreespecies--morethan8millionyears--and38showsthattheyhavesurvivedpreviousperiodsaswarmasmanyoftheglobalwarmingimaginedperiods39fortheyear2100.Theauthorswritethat,havingsurvivedwarmperiodsinthepast,thetreeswill40survivefuturewarming,providedtherearenoothermajo
3、renvironmentalchanges.41extremedroughtsandforestfireswillimpactAmazoniaastemperatures42,thetreeswillstandthedirectimpactofhighertemperatures.Theauthors43thataswellasreducinggreenhousegasemissionstominimizetheriskofdroughtandfire,conservationpolicyshouldremain44onpreventi
4、ngdeforestationforagricultureandmining.Thestudydisagreeswithotherrecentresearcheswhichpredictedtreespecies’extinctions45relativelysmallincreasesinglobalaverageairtemperatures.Studyco-authorDrSimonLewis(UCLGeography)saidthe46weregoodnewsforAmazontreespecies,butwarnedthatd
5、roughtandover-exploitationoftheforestremainedmajor47totheAmazon’sfuture.DrLewissaid:“Thepastcannotbecompareddirectlywiththefuture.whiletreespeciesseemlikelyto48higherairtemperaturesthantoday,theAmazonforestisbeingtransformedforagricultureand49,andwhatremainsisbeingdegrad
6、edbylogging,andincreasinglysplitupbyfieldsandroads.“Specieswillnotmoveasfreelyintoday’sAmazonastheydidinpreviouswarmperiods,whentherewasnohuman50.Similarly,today’sclimatechangeisextremelyfast,makingcomparisonswithslowerchangesinthepast51.”“Withaclearer52oftherelativerisk
7、stotheAmazonforest,we53thatdirecthumanimpacts--suchasforestclearancesforagricultureormining--shouldremainakeypointofconservationpolicy.Wealsoneedmoreaggressive54toreducegreenhousegasemissionsinordertomakeminimumtheriskofdroughtandfireimpactsand55thefutureofmostAmazontree
8、species.”36.A.advertisedB.describedC.publishedD.presented37.A.frighteningB.surprisingC.excitingD.intere
