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1、智課網(wǎng)TOEFL備考資料美科學家研究蜜蜂數(shù)量減少的原因一托福閱讀機經(jīng)背景Volunteersequippedwithnothingmorethandigitalcamerasaretakingpartinanunusualbeehunt.一些只帶著數(shù)碼相機的義工正在參與一項不尋常的環(huán)境研究。It'spartofanenvironmentalstudythathasamateurphotographersdocumentingtheimpactofclimatechange,pollutionandotherfactorsontheinterplaybe
2、tweenplantsandthecreaturesthatpollinatethem.這個“尋覓蜜蜂計劃”要求業(yè)余攝影家們記錄下氣候變化、污染和其它因素對植物和傳播花粉的蜜蜂之間相互作用所造成的影響。FreezeframeBeespollinate$10billionworthoffruits,nutsandavarietyofrowcropseachyearintheUnitedStates.在美國,蜜蜂每年為價值100億美元的果實、堅果和其它作物傳授花粉。Yetrecentdeclinesinthepopulationoftheseessenti
3、alinsectsthreatenthelucrativeagriculturalindustry.可是,最近蜜蜂數(shù)量的減少,威脅到這些收益良好的農(nóng)副產(chǎn)品的生產(chǎn)。SamDroege,aresearcherattheUSGeologicalSurvey'sNativeBeeInventoryandMonitoringLab,isexaminingpossiblecausesforthebeedecline.Workingwithanonlineenvironmentalencyclopediacalled,"DiscoverLife,"Droegehas
4、helpedorganizetheBeeHuntstudy.為了找出導致蜜蜂數(shù)量下降的可能原因,德羅基利用網(wǎng)上環(huán)境百科全書“發(fā)現(xiàn)生命”,組織起一個叫作“尋找蜜蜂”的研究項目。BeehuntersacrosstheUnitedStatestakepicturesofpollinatorsandtheplantstheypollinate,andthenuploadthemtothe"DiscoverLife"website.Theonlinedatabasekeepstrackoftrendsinpollinatorpopulationsthatshow
5、theeffectsofclimatechange,pollutionorinvasivespecies.美國各地的尋蜂者拍攝傳授花粉的昆蟲和接受花粉傳授的植物照片,并且將這些照片上載到“發(fā)現(xiàn)生命”網(wǎng)站。網(wǎng)路資料追蹤因為氣候變化、污染或外來物種入侵造成的傳授花粉昆蟲數(shù)量的變化趨勢。TrackingpollinatorpopulationsDroege'slabisfilledwithboxesofdeadbeesatvariousstagesofidentification,butthepartofhisjobheseemstoreallyenjoyi
6、sbeingoutsidehuntingforlivebees.山姆·德羅基的實驗室里擺滿了盒子,里面裝著不同時期死亡的蜜蜂。這是他為美國地質(zhì)調(diào)查局的“本土蜜蜂清查監(jiān)測實驗室”所做的工作。在這個工作當中,他最喜歡的是到野外尋找活著的蜜蜂。Afterashort,bumpycarride,Droegestopsatasmallgrassyfieldfilledwithmilkweed,Canadathistleandbees.Hefeelsthereisanurgentneedforalargesamplingofpollinatorpopulation
7、sacrosstheUnitedStates.德羅基在崎嶇道路上開了一小段路,然后停在一小片長滿了紫云英和加拿大薊荊、蜜蜂飛舞的草地上。他說,現(xiàn)在急需大范圍采集全國各地傳授花粉昆蟲的樣品:"There'snobureaucensusofbees,"hesays."Sowearetryingtocreatethatinanywaypossible.There'snotalotoffunding,sohavingcitizenscollectthatkindofinformationwouldbeadvantageous."Informationonthe
8、statusofpollinatorshelpsresearchersunderstandex