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干扰改变景观格局,同时又受景观格局的影响,干扰是景观异质性的一个主要来源。应用ILWIS地理信息系统,以1∶20000植被图为基础,结合野外考察,分析了北京东灵山地区森林景观空间格局,采用缓冲区分析方法,研究了人类活动对该地区森林景观格局的影响。研究结果表明,在东灵山地区,人类活动的强弱与景观的破碎化表现出一定的相关性。人类作用强的地区斑块面积较小,作用弱的地区斑块面积较大,人类的活动对该地区的景观破碎化产生了明显的影响。随着距所选择的干扰区的远近,几个景观多样性指数没有表现出有规律的大小变化。虽然该地区人类活动有愈来愈强的趋势,但目前决定该地区景观空间格局的因子主要还是自然要素,人类活动虽然也对该区的景观格局产生了一定的影响,但还不是决定因素
Interference changes the landscape pattern, meanwhile, it is influenced by the landscape pattern. Interference is one of the main sources of landscape heterogeneity. Based on 1: 20000 vegetation map and field investigation, ILWIS geographic information system was used to analyze the spatial pattern of forest landscape in Dongling Mountain, Beijing. The impact of human activities on the forest landscape pattern was studied by using buffer analysis method. The results show that in the Dongling Mountain area, the intensity of human activities and the landscape fragmentation show some correlation. Plaque area is small in the human-intensive area, plaque area is weak in the weak area, and human activities have a significant impact on the landscape fragmentation in the area. With the distance from the selected interference area, several landscape diversity indices did not show a regular size change. Although the human activities in this area are getting stronger and stronger, the factors determining the landscape spatial pattern in the area are mainly natural elements. Although human activities have some influence on the landscape pattern of the area, they are not the determinants