【摘要】 以我国东北部地区为研究对象,针对区域自然植被分布特点,利用多元分析和GIS技术,建立了基于8个环境变量(气候、地形和土壤)的东北地区区域“植被-环境”模型,对当前环境条件下,东北地区潜在自然植被类型及其地理分布进行了模拟分析.经检验,“植被-环境”模型取得了较好的模拟效果,总体精度为66.91%,Kappa统计量值为0.61.在此基础上,获得我国东北地区“潜在自然植被图”.该模型可进一步用于全球变化条件下,潜在自然植被类型及其变化的预测.更多还原

【Abstract】 Based on the characteristics of natural vegetation distribution in northeast China,using multivariate analysis and geographical information system(GIS) technology,the regional ‘vegetation-environment’ model was established to simulate geographical distribution of 16 climax vegetation types representing the potential natural vegetation (PNV) of the northeast China,on the basis of digital maps of 8 environmental variables including climate,topography and soil types.The model was interfaced to GIS and used to generate a PNV map of the northeast China.The similarity between the simulated PNV and the actual natural vegetation distribution was very good with the accuracy of 66.91% and Kappa value of 0.61.The model can be used to analyze the effect of climatic changes on natural vegetation.更多还原