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1、Module6 AnimalsinDangerⅠ.话题延读(2018河北衡水中学二模)Illegallytradedendangeredspeciesthatescape,formingsecondarypopulations,offerhopetotheirlong-termsurvival,astudysuggests.“ThisfirstcametomyattentionwhenIreadanewsstoryabouttheseizureofanillegalshipmentof23yellow-crestedcockatoos(小葵花凤头鹦鹉),”saidLukeGibson,acol
2、legeteacher.Helearnedthatthespecieswascriticallyendangered,whichsurprisedhim.ThisencouragedDr.Gibsonandhiscolleaguetoinvestigate(调查)howacriticallyendangeredspecieshadbecomeself-sustainingoutsideofitsnaturalrange.Theydiscovered49casesofagloballythreatenedspeciesbecomingestablishedasaseparatepopulatio
3、n,whichtheyhadn’tthoughtof,includingtheyellow-crestedcockatoointheircity.“Thisisaspecieswhichisprimarilythreatenedbywildlifetrade,”hetoldBBCNews.“PoachersgooutintotheforestinitsnativerangeineasternIndonesiaandcapturethebirdandthenshipthemoff,usuallyuptoourcitywherethereisastrongdemandforpetbirds.Thi
4、siswhathasfueledthedeclineofthisspeciesinitsnativerange.Butit’sreallyinterestingbecausethatsamecausealsohadanothereffect:someofthepeoplewhowerekeepingthisspecieshereaccidentallyorintentionallyreleasedthem.”Asaresultofenoughofthebirdsbeingreleased,itallowedanewself-sustainingpopulationtobeestablished
5、inthiscity.ThegovernmentinDr.Gibson’scityhasmadeitillegaltocapturethespecies,eventhoughitisanon-nativespecies.Becausethecityisaffluentandrelativelywelleducated,thecasesofpeoplebreakingthelawareextremelyrare,explainedDr.Gibson,unlikeinitsnativerangeinIndonesia,wherecapturingbirdsformsamajorsourceofin
6、come.However,therecanbedownsides(缺点)tothenewlyestablishedpopulationofendangeredspecies,suchasalimitedgeneticpool,andsufferingfromnoveldiseases.Itdidalsopresentapossible“veryinteresting”opportunityforconservationists,Dr.Gibsonsuggested.Thiswouldinvolve“harvesting”someofthenewlyestablishedsecondarypop
7、ulation,whichmayprovideawaytohelpslowglobalbiodiversityloss.1.WhatwasbeyondGibson’sexpectationsaccordingtothefirstparagraph?A.Thehighrateofwildlifetrade.B.Thepreciousnessofthebirds.C.Thefactthatthebir
