濒临灭绝的动物英语PPT

Doyoulikeanimals?Havealook～～Whatdoyouthink?Theyarereallylovely!Butunfortunately,theyareallendangeredanimal.Thetwelvemostendangeredanimalspecies古巴鳄（Cubancrocodile）佛罗里达戴帽蝙蝠(Floridabonnetedbat)绿眼蛙（GreenFrog）格林纳达鸽（Grenadadove）亨氏羚羊(Heinzantelope)犁头龟(Ploughsharetortoise)苏门答腊猩猩(SumatranOrangutan)岛屿灰狐(Urocyonlittoralis)白头叶猴Whiteheadedleafmonkey小头鼠海豚PhocoenasinusNorris普氏野马(Equusprzewalskii)罗默小树蛙(Luo'streefrog)Thereareover5000Vertebrate(脊椎动物）animalsarethreatenedorendangered.Manythingscancauseanimalstobecomethreatenedorendangered;Mostproblemsarecausedby……FollowingaresomemajorPROBLEMS:FirstProblems:habitatlossHabitatistheecosystem(生态系统）ofanimals,theyneedtoliveinproperplace,suchasswamp,rainforest,desert,etc.Humanreplacetheanimalhabitats,itcouldcauseanextensivelossofrangesforanimals.SecondProblem:pollutionCommercialandindustrialoperationscanreducelandandpolluteenvironment.AirpollutionWaterpollutionThirdFactor:predationorillegalkillingPredationmakesanimalsbecomeendangeredisover-fishingorover-hunting.捕杀藏羚羊捕杀藏羚羊ForthFactor:introductionanimalManyrarityanimalsareintroducedbypeopletoareaswheretheyneverexistedbefore.Theintroductionofanon-nativespeciestoahabitatmaymakeanimalsbecomeendangered.许多稀有的动物被人们引进到他们从未生存过的地方，引进一个非本地物种到一个栖息地可能使动物濒临灭绝。FifthFactor:diseaseIntroducedanimalsbringnewdiseaseswiththem,becomesanotherreasonofwhyareanimalsendangered.Thenativeanimalscan’tresistance（抵抗）tonon-nativediseases.Anothercauseofdiseaseischemicals.Somechemicalsdirecteffectonsomeanimal’spopulation.What’syourfeelingnow?Doyouwanttheselovelyanimalslive?Wehavetoknowthatwhenanimalsbecomeendangered,theentirefoodchaincanbeaffected.ThesefivemajorPROBLEMSareallcausedbyHUMANS!!So!!Please!!Helptheendangeredanimals,helpourselves,helptheworld!