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1、Comment[TW1]:Breviashouldbeascloseto1printedpageaspossible.PleaseOld-GrowthForestsCanAccumulateCarboninSoilskeepthisinmindwhenmakingcorrections.121111GuoyiZhou,*†ShuguangLiu,*ZhianLi,DeqiangZhang,XuliTang,ChuanyanZhou,11JunhuaYan,andJiangmingMo1SouthChin
2、aBotanicalGarden,ChineseAcademyofSciences,Guangzhou,510650,China.2SAIC,contractortoU.S.GeologicalSurvey(USGS)CenterforEarthResourcesObservationandScience,SiouxFalls,SD57198,USA.WorkperformedunderUSGScontract03CRCN0001.Comment[TW2]:Thisinformationwasmoved
3、totheacknowledgements*Theseauthorscontributedequallytothiswork.note.†TowhomcorrespondenceshouldbeaddressedCorrespondingauthor.eE-mail:gyzhou@scib.ac.cnAuthor:Pleasecheckcarefullyalleditingchangeshereandrespondtothequeriestoyouthatareshownintherighthandma
4、rginandmarkedby[TW1],[TW2],etc.Insertedtextisingreenandbold;deletedtextisredandstrickenthrough.Pleasemarkallchangesdirectlyonthegalleys.Thankyou.TristaWagonerSeniorCopyEditorScience1200NewYorkAve.,NW,11thFloorWashington,DC20005phone:202-326-6519fax:202-7
5、89-4669e-mail:twagoner@aaas.orgZhouetal.,p.2Comment[TW3]:UseofOld-growthforestsarehavetraditionallybeenconsideredinsignificantascarbonsinksbecause“significant”isrestrictedtostatisticalcarbonuptakehasbeenthoughttobebalancedbyrespiration.HerewWeshowthatsoi
6、lsthetopsignificance.Ifstatisticalsignificanceisnotmeant,pleasesubstituteanother20-centimetersoillayerinpreservedold-growthforestsinsouthernChinaaccumulatedappropriateterm(forexample,atmosphericcarbonatanunexpectedlyhighaveragerateof0.61MmegagramsgofCcar
7、bon“substantial”or“notable”).−1−1hectareyearfrom1979to2003inthetop20cmsoillayerinpreservedold-growthforestsinComment[TW4]:Revisedtoavoidrepeating“soil”andtoeliminateasouthernChina.Thisstudysuggeststhatthecarboncycleprocessesinthebelowgroundsystempreposit
8、ion,butpleaserevisefurtherifIoftheseforestsarechanginginresponsetothechangingenvironment.Theresultdirectlyhavealteredyouroriginalmeaning.challengestheprevailingbeliefinecosystemecologyregardingcarbonbudgetinold-growthComme
