36539.古爾班通古特沙漠白梭梭群落結(jié)構(gòu)特征及其時(shí)空分布差異

1、中國(guó)科學(xué)院新疆生態(tài)與地理研究所碩士學(xué)位論文古爾班通古特沙漠白梭梭群落結(jié)構(gòu)特征及其時(shí)空分布差異姓名：宋春武申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：生態(tài)學(xué)指導(dǎo)教師：蔣進(jìn)20080601AbstractIHAbstractBasedonthefieldinvestigationdatain2007andonMaytoOctobereighttransectsand32plotsofregionfromnorthtosouthintheGurbantonggu

2、tedesertThispaperstudiedonthestructuralcharacters、speciesdiversityandrelationshipofvegetationdistributioncompositionsandenvironmentalfactorsofHaloxyonPeplumcommunitieswithapplicationofMultivariateStatisticalMethodTheconc

3、lusionsareshownasfollowing：1Thespeciescategoryconstitutedtostatistictotallyhas65speciesofhigherplantbelongingto22families56generaofHaloxyonPemwumcommunitiesinthestudyareaAmongthem，Chenophdiaceae(9species)andComposifae(10

4、species)arethemostdominantfamilies，followlyLeguminosae(5species)，Liliaceae(5species)、Cruciferae(4species)、Boraginaceae(4species)，etalTheHaloxyonPerswumcommunitieshavethecharacterofvariouslifeformAmong65speciesofhigherpla

5、nt，ephemeralplant0971％)ephemeroidPlant(2647％)therophytes(1471％)shrubson(1029％)semishrub(588％)smaUnanotree(294％)ontheproportionofspeciesareasfollowing2Quantitativecharacteristicsofthecommunityhasobviouschange：Speciesnumbe

6、rtotalindividuals，thevegetationcoverageinunitareafromhighertolower，wereSpringAutumnSummerwithseasonalchange；thoseweresouthnorthmiddlefromsouthtonorthinregional；andthosewereinterdunesmidslopecrestindifferentphysiognomypos

7、itionsSimpsonindex，Shannonindex，EvennessindexandBfillouinindexhaveseasonalchange：SpringAutumnSummer；andthosewereinterdunesmidslopecrestindifferentphysiognomypositions；ThechangelawofimportancevalueindexwereoverO01arefollo