资源描述：
《change in Mediterranean ecosystems》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、WATERRESOURCESRESEARCH,VOL.44,W11412,doi:10.1029/2007WR006371,2008Transientsoil-moisturedynamicsandclimatechangeinMediterraneanecosystems1,23212,4F.Viola,E.Daly,G.Vico,M.Cannarozzo,andA.PorporatoReceived23July2007;revised8September2008;accepted17September2008;pu
2、blished11November2008.[1]PlantsinMediterraneanecosystemshavedevelopeddifferentstrategiestocopewithtransientsoil-moisturedynamicsinducedbythemarkedlyoutofphaseseasonalbehaviorofrainfallandtemperature.Deep-rootedplantsusethesoilmoisturestoredinthewetwinter(extensi
3、veusers),whileshallowerrootedplantsexploitboththewetseasonstorageandthemoresporadicgrowingseasonrainfall(intensiveusers).Usingstochasticmodelsofsoil-moisturedynamics,wepresentananalyticalandnumericaldescriptionoftheprobabilisticstructureofthesoil-moisturestorage
4、atthebeginningofthegrowingseasoninrelationtothedynamicsofthewetseasonandthenstudyitsevolutionduringthesubsequentgrowingseason.Specialattentionisdevotedtoplantwaterstressasafunctionoftherootingdepthandthesoil-moisturestorageatthebeginningofthegrowingseason.Theexi
5、stenceofanoptimalrootingdepthforMediterraneanclimatesanditsdependenceonfuturehydroclimaticscenariosarediscussedwithreferencetoatestcaseinSicily,Italy.OuranalysessuggestthattheforecasteddecreaseinrainfallfortheMediterraneanregionsmightleadtoaconsiderableincreasei
6、nplantwaterstressandfavorvegetationwithshallowerrootsystems.Citation:Viola,F.,E.Daly,G.Vico,M.Cannarozzo,andA.Porporato(2008),Transientsoil-moisturedynamicsandclimatechangeinMediterraneanecosystems,WaterResour.Res.,44,W11412,doi:10.1029/2007WR006371.1.Introducti
7、ontransientsoilmoistureduringthegrowingseason.Atrade-offbetweenshallow-anddeep-rootedplantstrategiesemerges.[2]TheMediterraneaneco-regionisdefinedintermsofWhileitislogicaltoexpectpossibleshiftsinthebalancebioclimaticsimilaritiesand,inadditiontothecountriesbetwee
8、nthesedifferentstrategiesduetoalterationsinfuturelocatedaroundtheMediterraneanSea,isalsocomposedofclimatesandrainfallregimes,itsdirectionanditssensitivityCalifornia,c
