濒临灭绝的动物英语PPT

1aDoyoulikeanimals?Havealook～～2a3aWhatdoyouthink?

Theyarereallylovely!Butunfortunately,theyareallendangeredanimal.

4aThetwelvemostendangered

animalspecies

古巴鳄（Cubancrocodile）佛罗里达戴帽蝙蝠

(Floridabonnetedbat)

5a绿眼蛙（GreenFrog）格林纳达鸽（Grenadadove

）6a亨氏羚羊

(Heinzantelope)犁头龟

(Ploughsharetortoise)7a苏门答腊猩猩

(SumatranOrangutan)岛屿灰狐

(Urocyonlittoralis)8a白头叶猴

Whiteheadedleafmonkey小头鼠海豚

PhocoenasinusNorris9a普氏野马(Equusprzewalskii)

罗默小树蛙(Luo'streefrog)10aThereareover5000Vertebrate(脊椎动物）animalsarethreatenedorendangered.Manythingscancauseanimalstobecomethreatenedorendangered;Mostproblemsarecausedby……11aFollowingaresomemajor

PROBLEMS:FirstProblems:habitatloss

Habitatistheecosystem(生态系统）ofanimals,theyneedtoliveinproperplace,suchasswamp,rainforest,desert,etc.Humanreplacetheanimalhabitats,itcouldcauseanextensivelossofrangesforanimals.12aSecondProblem:pollution

Commercialandindustrialoperationscanreducelandandpolluteenvironment.

Airpollution

Waterpollution13aThirdFactor:

predationorillegalkilling

Predationmakesanimalsbecomeendangeredisover-fishingorover-hunting.14aForthFactor:introductionanimal

Manyrarityanimalsareintroducedbypeopletoareaswheretheyneverexistedbefore.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。15aFifthFactor:disease

Introducedanimalsbringnewdiseaseswiththem,becomesanotherreasonofwhyareanimalsendangered.Thenativeanimalscan’tresistance（抵抗）tonon-nativediseases.Anothercauseofdiseaseischemicals.Somechemicalsdirecteffectonsomeanimal’spopulation.16aWhat’syourfeelingnow?Doyouwanttheselovelyanimalslive?Wehavetoknowthatwhenanimalsbecomeendangered,theentirefoodchaincanbeaffected.ThesefivemajorPROBLEMSareall