典型岩溶区县森林景观格局动态研究——以重庆市酉阳土家族苗族自治县为例

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1、ABSTRACTResearchonDynamicPatternofForestLandscapeinTheTypicalKarstCountyacaseofYouyangautonomouscountyMajor：PhysicalGeographyPostgraduate．"ZhangHuanyuTutor：ProfessorXieShiyouFocusonthetypicalkarstareacounty---Youyang，basedonClassIIsurveydataofforestresourcesin2002and2012，combi

2、nedwithfieldsurveydata，thispaperconductedaresearchonthedynamicchangeandlandscapepaRerncharacteristicsofforestresourcesin10years．UnderthesustentationofArcGIS9．3andFragstats3．3，bymeansofprincipleoflandscapeecology,itanalyzedthecompositionoftheforestlandscapeandthecharacteristics

3、ofspatialpatterninthestudyareafromlandscapeelements，patchcharacteristicsandlandscapeheterogeneityrespectively．Inaddition，ithasextractedthreeterrainfactors(elevation，slope，slopeaspect)formtheDEMofresearchedregion，andstudiedtheforestlandscapetypesdistributionalongthedifferentter

4、raincharacteristicsin10years．Theresultsshowthattheforestlandscapepatternchangedsignificantlyfrom2002to2012．Asalandscapematrix，woodlandareapercentageincreasedfrom58．48％to58．48％．However,non-forest，forestation-suitablelandandshrubberyisdecreasing，thetotalnumberofpatchesincreasedb

5、y43356withanincreaserateof166．86％．Itisworthnotingthattheaveragepatchsizeshowesatrendofdecrease，gradedstructureisgivenprioritytowithsmallpatchesandlandscapetendstobefragmentationasawhole．Moreover,thepatchdensity,edgedensity,thedegreeoflandscapefragmentationandoveralllandscapepa

6、tchshapeindexincreased，whichprovesthatpatchesshapechangetowardstocomplicatedandirregular．Inaddition，landscapediversityindexandevennessindexincreased，landscapeelementpatchesisdevelopingtowardsmultipleanduniform，andforestlandscapeheterogeneitystrengthened．Itisnotonlyaffectedbyth

7、ezonalclimatecondition，bualsobythethreeterrainfactorsregularlyanddifferently．Specifically,non—forestdistributiontendstolowslopeareas，woodlandextendtothehigheraltitude，slopesteepregion，andtheforestlandscapetypes’distributionintheslopeisroughlysimilarotherthantheeastandsoutheast

8、whichincreasedinareaproportion．Thestatisticsshowthatthemainre