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1、8英语泛读教程1--UnitFour--Text1英汉对照TextOneMigratoryBirdsandCoffeeIntroduction--Shade-growcoffeeplantationsplayakeyroleintheconservationofmigratorybirdsthathavefoundasanctuaryinheforest-likeenvironment.Readthefollowingfactsheetandlearnmoreaboutit.1．InbothNorthand
2、LatinAmerica,migratorybirdshavefoundasanctuaryintheforest-likeenvironmentoftraditionalcoffeeplantations.IneasternChiapas,Mexico,biologistsfoundthattraditionally-managedcoffeeandcacao(chocolate)plantationssupportover150speciesofbirds;agreaternumberisfoundin
3、otheragriculturalhabitats,andexceededonlyinundisturbedtropicalforest.Eveninverydisturbedareas,coffeeplantationssupportgoodpopulationsofmigrantsandotherspeciesthatpreferorarerestrictedtoforesthabitats,suchasredstarts,black-throatedgreenwarblers,andresidents
4、includingparrotsandwoodcreepers.2．However,becauseofrecentchangesincoffeeproductionandmarketing,shadecoffeeplantationsareathreatenedhabitat.Inthepasttwentyyears,coffeehasbeguntobegrownwithnoshadecanopyatall.Whilethismannerofcultivation课文一MigratoryBirdsandCo
5、ffee导语：侯鸟在类似森林环境的荫栽咖啡种植园找到了栖息地，这些种植园在保护候鸟方面起了重要作用。阅读下面的介绍，以了解更多这方面的信息。1.在北美洲和拉丁美洲，候鸟在传统咖啡种植园类似森林的环境中找到栖息地。生物学家发现，在东恰帕斯和墨西哥，传统方式经营的咖啡和可可(巧克力)种植园支持的鸟类超过150种。在其他农业栖息地，发现的鸟类数目更大，末受侵扰的热带森林才会超过这个数目。即使在受到较大侵扰的地区，咖啡种植园也支持为数可观的候鸟和其他鸟类。这些候鸟和其他鸟类，如红尾鸟和黑喉绿莺，以及包括鹦鹉和砍林鸟
6、在内的居民，选择了森林栖息地，或者仅限于森林栖息地。2.8英语泛读教程1--UnitFour--Text1英汉对照producesincreasedyields,thesecannotbesustainedformanyyearswithoutintensivemanagement(additionsofchemicalfertilizersandarangeofinsecticides,herbicidesandfungicides).1．Asidefromtheagronomicrisks,suncof
7、feeproductionhasresultedinmajorhabitatchangeformigratorybirdsinthepasttwodecades.Ofthepermanentcroplandplantedincoffee,theamountundermodern,reduced-shadecoffeesystemsrangesfrom17%inMexicoto40%inCostaRicaand69%inColombia.Thefewstudiesthathavebeenconductedha
8、vefoundthatthediversityofmigratorybirdsdropssharplywhencoffeeisconvertedfromshadetosun.Onestudyfoundadecreasefrom10to4commonspeciesofmigratorybirds.Asfortheoverallavifauna,studiesinColombiaandMexicofound94-97
