林业科学英语Unit 6 Lecture 2.pptx

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林业科学英语Unit 6 Lecture 2.pptx

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Unit6ForestProtection

Lecture2ComprehensionofTextA

HowmanyanimalsarementionedintextA?Whatdamagehavetheydonetoforest?

Whatdamagehaveanimalsdonetoforest?Hogsburrowintothegroundandeatthetender,nutritiousrootsofmanyyounggrowingtrees.Mooseandelkimpairreproductionoftreesbyoverbrowsing.

Deereatupacorncrops,nipofftheleadersofyoungtrees,andremovethebarkbytheactionofrubbingthevelvetfromtheirantlersagainsttrees.Blackbearsscratchandbiteoffthetree’souterbarktogetcambium.Whatdamagehaveanimalsdonetoforest?

Rabbitsnipandnibbleyoungshoots,whichresultsinadeformedbushofatree,ifnotkillit.Porcupinesgirdletreesallyearlong.Whatdamagehaveanimalsdonetoforest?

Beaverscutdownsmallpole-sizedtreesfortheirfood,housing,anddamconstruction.Squirrels,chipmunksandwhite-footedmicedodamagetoseedcrops.Whatdamagehaveanimalsdonetoforest?

Domesticsheepbrowseonsucculentrootsofyoungpines,andtrampledownthegrassyareas.Elephantspushover,break,anduproottrees.Whatdamagehaveanimalsdonetoforest?

Thereare13animalsmentionedinthetext.HowmanyanimalsarementionedintextA?

comprehensionquestions1.Whatisblackbears’majorfooditem?howdopeopleknowit?

Whatisblackbears’majorfooditem?Howdopeopleknowit?Thejuicycambiumnearthebaseofcertaintreesisamajorfooditemofblackbears.Theyscratchandbiteoffthetree’souterbarkinthespringandearlysummer.Ananalysisofabear’sstomachexplainstheirbehavior.

comprehensionquestions2.Whycouldrabbitsquicklyoverpopulatetheirhabitatanddamageforestvegetation?Isthereanyeffectivemethodtocontrolthem?

Whycouldrabbitsquicklyoverpopulatetheirhabitatanddamageforestvegetation?Isthereanyeffectivemethodtocontrolthem?Becauserabbitshaveshortreproductioncycle.Themajorsuccesshasbeenexperiencedwithrepellentstocontrolthem.