土壤呼吸对温度升高的适应-1

2411200411ACTAECOLOGICASINICAVol.24,No.11Nov.,20041,1,13,2,1,1,1(11,100093;21,100101):(30330150);(KZCX12SW201204,KSCX1208203);(G2000018603,G1999043407):2004203204;:2004209215:(1968),,,,.3Authorforcorrespondance.E2mail:[e-mail]:NationalNaturalscienceFoundationofChina(No.30330150);CASProjectofKnowledgeInnovationProgram(No.KZCX12SW201204,No.KSCX1208203);NationalKeyBasicResearchSpecialFoundationProject(No.G20000018603,No.G1999043407)Receiveddate:2004203204;Accepteddate:2004209215Biography:CHENQuan2Sheng,PhD.,mainlyengagedinbiogeochemistryandglobalchange.:,,,,,,Q10,:CO2;;;Q10;;AcclimatizationofsoilrespirationtowarmingCHENQuan2Sheng1,LILing2Hao1,HANXing2Guo13,DONGYun2She2,WANGZhi2Ping1,XIONGXiao2Gang1,YANZhi2Dan1(11LaboratoryofQuantitativeVegetationEcology,InstituteofBotany,theChineseAcademyofSciences,Beijing100093;21InstituteofGeographicSciencesandNaturalResourcesResearch,TheChineseAcademyofSciences,Beijing100101,China).ActaEcologicaSinica,2004,24(11):26492655.Abstract:Soilrespirationisanimportantcomponentofcarboncycleofterrestrialecosystem,andisusuallydrivenbytemperature.Feedbackbetweencarboncycleandglobalclimatechangeismostlydeterminedbythesensitivityofsoilrespirationtowarming..Thesensitivityofsoilrespirationtowarmingdeclineswhentemperaturecontinuallyincreases,orwarmingkeepsmuchlonger,whichisacommonphenomenonknownasacclimatization.Mainmechanismsinvolvetransferbetweendominantfactorsandchangeofotherfactorswithtemperature.Therearemanyfactorsotherthantemperaturethatcouldimposedifferenteffectsonsoilrespirationundercertaintemperatures,suchaswatercontent,soilnutrient,roots,soilmicroorganism,etc.,,whichcouldplaydominantroleswhentemperatureishighenough.Thosefactorsusuallychangewithtemperature,e.g.whentemperatureincreasesorwarmingcontinuesforaprolongedtime,soilmightbecomedryer,labilecarbonmightbedecreased,activityofenzymerelatedtorespirationofsoilmicroorganismandrootsmightbereduced,allocationofphotosyntheticproductiontobelowgroundmightbedepressed.Acclimatizationofsoilrespirationisanegativefeedbackofcarboncycletoglobalwarming,whichcouldmitigatethecouplingofterrestrialecosystemandglobalclimate,i.e.,CO2effluxfromsoilstimulatedbywarmingwouldberestrictedbytheacclimatizationinsomedegree.Becauseofacclimatizationofsoilrespirationtowarming,CO2fluxfromsoilrespondingtoglobalclimatechangeislikelytobecomplexandhighlyvariablespatiallyandtemporally.Modelingisanecessaryapproachforpredictingorsimulatinghowecosystemrespondstoclimatechange,butmostofthecurrentlyusedmodelsdonottakeintoaccountofthesensitivityofsoilrespirationtotemperature.AfixedQ10mightresultinlargeerrorsorbiaseswhenpredictingCO2fluxfromsoilandfutureclimate©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.conditions.Keywords:soilCO2efflux;globalwarming;climatechange;Q10;sensitivitytotemperature;feedbackeffect:100020933(2004)1122649207:S15411,P461,Q14213:A19,,CO2,,014018[1],,IPCC,2100,114518,[1],,,,[2],,[3,4];,,,,,[5],[6],CO2,,,,1,CO2[718],[3,5,9,14,19,20],Q10,10,,[21],[19]Boone[22],CO2Q10[2325],,,,,,,,(Acclimatization)[26],[27]111,Kirschbaum[14],,,20Q102,0Q108,Keith[28],,10Q10114,10Q10311;Davidson[29],HemlockQ10Luo[30],Q10Q10SorZealand,JanssensPileggaard[31],Q10(16)(413)XuQi[32]SierraNevada,,112,,,,,Rustad[2]32,3a,,45,Melillo[33]Massachusetts10a,6a,28%,4a,,10,,Peterjohn[34],1,,,40%,Lin[35](Douglas2firforest)Rustad[36](Sprucefirforest)McHale[37](Hardwoodforest)2,,056224©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,211,,,[38],,,,,,,[17],,,[18,39]Qi[21],XuQi[32]KutschKappen[40]Q10212,(1),,,,,[41,42],,,,,,[41,42][43],,(2)[33],,;,,,(LabileC)[44,45],,,,[2],,[46][47],,(3)(),[48],(),,,,,,,ThornleyCannell[49],,,,,(4)[2,5057],Melillo[33],(10a41göm2),,,,[58],,C:N,,,,,,,(Primingeffect),,,,(5),,Schleser[59]Kirschbaum[14]Trumbore[60]Q10;Boone[22]Q10Q10,,,,,,,,,Q10[31],,,(6):,156211:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,[31,61],,3311,,2050,CO2CO2,,,[5,47]Q10()[21,31,6264]68PgCöa[9],,TEMQ10(Q10=2)[65],100aIPCC518[1],,Q10,2100,,100PgCöa(1),,CO2514PgCöa,CO2116PgCöa[66],,Q10CO2,1Fig.1Relationshipbetweenglobalsoilrespirationandclimaticwarmingregardlessoftheacclimatization,,,CO2,,,Q10,,,,Cox[5]Luo[30],,,,,312,,,[2],,Schleser[59]Kirschbaum[14]Luo[30],,[67],,[1],,[68,69],,,(),,,[31,32,40],,,,4,,,,Q10,,,,,256224©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,Q101,,References:[1]HoughtonJT,DingY,GriggsDJ,etal.,editors.ClimateChange2001:TheScientificBasis.Cambridge:CambridgeUniversityPress,2001.[2]RustadLE,NorbyRJ,MitchellMJ,etal.Ameta2analysisoftheresponseofsoilrespiration,netnitrogenmineralization,andabovegroundplantgrowthtoexperimentalecosystemwarming.Oecologia,2001,126:543562.[3]WoodwellGM,MackenzieFT,HoughtonRA,etal.Bioticfeedbacksinthewarmingoftheearth.ClimaticChange,1998,40:495518.[4]WoodwellGM,MackenzieFT.BioticFeedbacksintheGlobalClimaticSystem:WilltheWarmingFeedtheWarming?OxfordUniv.Press,1995.321.[5]CoxPM,BettsRA,JonesCD,etal.Accelerationofglobalwarmingduetocarbon2cyclefeedbackinacoupled