2019版高二英语unit-5-Macquarie-Island课件

MacquarieIsland:fromChaostoConservationLearningaimsTolearnhowthechaoswascausedinMacquarieIslandandhowpeopletriedtoconserve(保护)theisland.2.Touse“causeandeffect”structure(因果结构)tounderstandthepassage.3.Torealizethegreateffectofhumans’actionsonecologyandtheimportanceofecologicalbalance.（生态平衡）Whatanimalscanyouseeinthepicture?

Penguinsandabird.导入2.Whatwouldtakeplaceifcats,ratsandrabbitswereintroducedtoanenvironmentlikethis?Theywouldhuntthebirdsandeatthenativevegetation,thusbreakingthelocalecologicalbalance.MacquarieIsland:fromChaostoConservation预习检测一

decreasedeparturetackleinterventionpest-freemultiplychaos

conservation

9.vegetation10.parakeetimmunitysoilerosionMacquarieIsland

inconsequenceWorldHeritageSiteelephantsealsinvadingspeciesinharmonywith

下降离开解决干预无害虫的增加混乱保护麦夸里岛结果是世界文化遗产海象植被土壤侵蚀长尾鹦鹉免疫力入侵物种与---和谐共处预习检测二（structure）Part1Para1

Part2Para2-3 Part3Para4-6

theintroductiontotheislandthechaosoftheislandtheconservationoftheisland

Lookthroughthepassageandmatchthemainideawitheachpart.ReadthePart1andthink:Howdoesthewriterintroducetheislandfromthefollowingaspects?1.Location1486km1294km2.Shapelongandthin

Howwastheshapeformed?Strongwindsandstormyseassculpteditsshape.

Inthe________________Ocean,________betweenAustraliaandAntarctica.South-westPacifichalfway3.LandscapeGreengrass;barerock;awildandnaturalbeauty

theintroductiontotheisland

4.Inhabitants

royalpenguins;kingpenguins;elephantseals1.Whatanimalswerebroughttotheisland?2.Whathappenedaftertheanimalsreachedtheisland?ReadPart2(paras.2-3)andanswerthequestions.Ratsandmice,rabbitsandcatswerebroughttotheisland.Theratstookover...,eating...andattacking...Thecatsdeveloped...Therabbitsmultiplied...andbeganeating...and...,causing...

thechaosoftheisland

rats&micerabbitshumansbirdssoilerosionparakeets

thecauseandresultflowchart

catsproviderats&micetakeover...eating...andattacking...controlrabbitsdeveloped...humansintroducedeat...dig...unknowinglybroughtbirdssoilerosionparakeetshunted...

thecauseandresultflowchart

catsbroughtrats&micebirdstakeover...eating...andattacking...catscontrolrabbitsdeveloped...humansintroducedsoilerosioneat...dig...provideunknowinglybroughtbroughtbirdseating...andattacking...soilerosionparakeetshumansrats&micehumanstakeover...hunted...Retellthispartaccordingtotheflowchart

Humans__________actionshavea________effectonecologycarelessbadWhatdidpeopledotodealwiththebadeffect?

themeasurestodealwiththechaos

TimeMeasure(s)Purpose(s)Result(s)ReadPart3(paras.4-6)&postscript,

andfillintheblanks.afterthe1970sinthe1980safter2006____wasreleased__________wereused.toremove_______________to__________toremovealltheremaininginvadingspeciesThelastcatwascaughtin_______.Themouseandratpopulationstartedto________.avirustraps&dogscatchthecatsTherabbitpopulation_______,butlatertheydevelopedan________tothevirusandtheirnumbers_______onceagain.Thecatsturnedtheirstomachsbackto______.alltherabbitsdecreasedimmunityexplodednativebirds2000increase______and_____wereused.poisondogsIn2014,theislandwas________anditsecologyisontheroadto________pest-freerecoveryproper?Humans’____________measuresmaydogreaterharmtoecology.improper

MacquarieIslandusedtobea1.________(natural)beautifulplacebuteverythingchangedwhenhumansarrivedontheisland.Theybroughtratsandmiceontotheisland,andthesesmallanimalsquicklytookovertheisland,2__________(eat)thebirds`eggsandattackingbabybirds.Catswerebroughttotheislandtocontroltheratsandmice.3_______________(fortunate),thecatssubsequentlydeveloped4_____________appetiteforthebirdstoo.Meanwhile,rabbits5_________________(introduce)totheislandasasourceoffoodforhumans,buttheymultipliedrapidlyandbeganeatingthenativevegetationanddiggingholes,6____________causedsoilerosion.

Theexplodingrabbitpopulationprovidedplentifulfoodforthecats.7_________consequence,thenumberofcatsalsoincreased.Thisinturnledtomorecats8_______________(hunt)thebirds.Later,aviruswasreleasedontotheisland,andtherabbitpopulationdecreased.Butmeanwhilethecatskilledmorebirdsforlackoffood.Inthe1980s,trapsanddogswereused9_____________(catch)thecats,anditworked.Withthedepartureofcatsfromtheisland,themouseandratpopulationincreasedagain.Therabbitsalsodevelopedanimmunitytothevirus,andtheirnumbersexplodedagain.Thisincidentmade10________clearthattheproblemneededsolvingonceandforall.

eating

Unfortunately

an

wereintroduced

which

In

hunting

tocatch

it

naturallySummaryDeeperthinking:WhatdoyouthinkistoblameforthechaosinMacquarieIsland?rats&mice?cats?rabbits?human’scarelessbehaviors

human'simpropermeasures“Wehumansoweittotheislandtogiveitahappyending.”ReadforuseGroupworkDisscus