29744.秦巴山區(qū)植被類型時空變化特征及驅(qū)動力研究——以漢中市為例

1、西北大學(xué)碩士學(xué)位論文秦巴山區(qū)植被類型時空變化特征及驅(qū)動力研究——以漢中市為例姓名：路莉申請學(xué)位級別：碩士專業(yè)：環(huán)境科學(xué)指導(dǎo)教師：白紅英20090617AbstractWehypothesizedgrassland(interspersedwithgrassandforest)asthestudyobject，andrefefredtherelatedstatisticalbooks：theStatisticalYearbooksofSh

2、aanxiProvinceandland—usechangedatassetsfromDepartmentofLandandRecoursesofShaanxiProvincefrom1996to2007andthefieldsurveyasourresearchdataBasedondynamicchangesandanalysismodelusingSPSS，weanalyzedspatio—temporalvariationoff

3、orestandgrasslandanditsanthropogenicdrivingforceduringpast12yearsinHanzhongarea，theresultsrevealtheregionaleconomicdevelopmentonecosystemstructureandfunctionofthestudiedareaWrecometosomeconclusionsasfollows：(1)Duetotheim

4、plementationof“RestoringFarmlandtoForestorPasture(RFFP)”policytheareaofgrasslandpresentedanincreasedtrendbetween1996and2007Withinthepasttwelveyears，Nearly12years，theareaoffarmlanddecreasedby143265millionkm2，meanwhilethea

5、reaofwoodlandincreased981thousandkm2andgrasslandincreased17391millionkm2nleareaofotherlandtypesmaintainedthesameasbefore(2)Spatialdistributionoforginalvegetationandartificial(second)vegetationaredifferentThedistributedpr

6、oportionofwoodland，shrubberythinstockedlandandorginalgrasslandareaislowinthecentralregionandhightintheperipheralpartYet，thedistributedproportionofatrtificial(second)grasslandishighinthecentral，lowintheperipheralTheyounga

7、fforestationlandmainlyintheperipheralarea，hencethechangeofforestaandgrassinthisregioncouldcontribute85％刀玲structureofforestandgrasslandarechanged。碭eareaofforestandgrasslandincreasedduringthepasttwelveyears，yet9990％ofthear

8、eaisyoungafforestationland，andwoodlanddecreasedslightlyafter2002andtill2007，theareashrinked4923muandorginialvegetationalsodecreased111isperhapscouldindicatedthatanthropogenicpressurehasnegativeimpactonorginialvegetationa

9、ndreplacetheorginialforestecosystems、析tllartificialecosystemsTheanalysisonthedrivingforceofforestpresentedthatthelandusepolicyofcoutylevelplaysamajorroleinthedynamicofforestareawhiletheeconomicconditionshavethemajorimpac

10、tsatcitylelveStudiedondrivingforceofforestchangesshowedthatforcountyareaoflanduse，theinfluenceoflandusepolicychangesoftheforestareaisstrongerwhilethelargermunicipal，regionaleconomicvitalityisthemaininfluenceRegionintheco