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Spatial distribution regularity and influence factors of population density in the LRGR

Science Bulletin 2007年第S2期 90-97页

作者： SONG GuoBao~(1,2) LI ZhengHai~(1,3+) BAO YaJing~1 L HaiYan~4 GAO JiXi~3 WANG HaiMei~5 XU Tian~6 CHENG Yan~7 1 Institute of Bio-Resources and Environment,College of Life Science,Dalian Nationalities University,Dalian 116600,China 2 College of Resources Science & Technology,Beijing Normal University,Beijing 100875,China 3 Innovation Base of Regional Ecology,Chinese Research Academy of Environmental Sciences,Beijing 100012,China 4 Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China 5 Inner Mongolia Municipality Observatory,Huhhot 010051,China 6 College of Life Science,Inner Mongolia University,Huhhot 010021,China 7 College of Ecological Environment,Inner Mongolia Agricultural University,Huhhot 010018,China

Combining GIS measures and statistic methods,this paper selects the physiographic factors and climatic factors to study the influencing strength and its functional forms of all factors on population density in the *** addition,this paper simulates the status of population density distribution in the LRGR with the factors influencing the population density *** findings indicate the following circumstances:(1)All natural factors have influence on the spatial pattern of population density in the LRGR,but the influencing extent and forms are quite *** factors and traffic network density have great influence on population density,while such factors as temperature and precipitation have little influence on population *** relationship between the popula- tion density and the altitude and traffic network density assumes the negative and positive linear cor- relation trends,while the influence of water system density and slope appears to be the exponential function and logarithmic function separately.(2)The population is scattered throughout LRGR and takes on such features as integral scattering and local concentration because of the influence of natural ***,a high population density belt has been formed in the middle of LRGR,and a high population density patch comes into being in the south of LRGR.(3)There is a good linear re- gression relationship between population density and human activity index(HAI)in the LRGR,which reflects that population density can present the artificial disturbance on natural ecosystem in the LRGR. (4)The increase of population density leads to the decrease of NDVI index.

关键词： population density artificial disturbance vegetation coverage physiographic factor LRGR

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