| 北京东灵山地区景观格局及破碎化评价 |
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| 引用本文： | 马克明,傅伯杰.北京东灵山地区景观格局及破碎化评价[J].植物生态学报,2000,24(3):320-326. |
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| 作者姓名： | 马克明 傅伯杰 |
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| 作者单位： | 中国科学院生态环境研究中心!北京100085 |
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| 基金项目： | 国家自然科学基金资助项目!( 3 9770 15 0和 4972 5 10 1) |
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| 摘 要： | 人类活动已将北京东灵山地区地带性原生暖温带落叶阔叶林破坏殆尽。本项研究基于植被图，在地理信息系统(GIS)支持下，选择多种景观格局指数，从斑块面积、斑块数、斑块周长、分形维数和多样性的角度进行了格局分析和破碎化评价。结果表明，该区景观类型以次生林和灌丛为主，面积分布极不均衡，且多呈小面积零散分布。各森林类型的分布面积、周长和斑块数一般小于灌丛、草地和农田，且边界密度和斑块密度较高，显示出较高程度的破碎化。各景观类型的平均斑块面积和周长遵从分形规律，分形维数1.30，景观整体的斑块边界的褶皱程度较低。景观多样性的Shannon指数，景观组分的类型面积(2.262)<类型周长(2.435)<类型斑块数(2.675)，均小于等概率情形(2.940)。上述结果均显示，该区森林景观破碎化程度较高。
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| 关 键 词： | 北京东灵山区 景观格局 景观破碎化 |
| 修稿时间： | 1998-09-11 |
LANDSCAPE PATTERN AND FRAGMENTATION IN DONGLINGSHAN MONTANE REGION |
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| MA Ke,Ming and FU Bo,Jie.LANDSCAPE PATTERN AND FRAGMENTATION IN DONGLINGSHAN MONTANE REGION[J].Acta Phytoecologica Sinica,2000,24(3):320-326. |
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| Authors: | MA Ke Ming and FU Bo Jie |
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| Abstract: | As a result of the disturbance associated with human activities, the zonal vegetation in Donglingshan montane region, Beijing ,— warm temperate zone deciduous broad-leaf forest—has been completely destroyed. Present vegetation consists of secondary vegetation and plantations. By examining vegetation maps, on a GIS platform, and utilizing a number of landscape pattern indices, the landscape pattern of the Donglingshan montane region was analyzed and the degree of fragmentation evaluated. Fragmentation was assessed through measures of patch area, perimeter, number of patches, fractal dimension and landscape diversity. Results showed that, forest and shrub types are the main components of the present vegetation in the montane region. The area of different landscape elements was very uneven, with most landscape types are dispersed among many small areas. The area, perimeter and number of patches of forest areas are smaller than those of shrublands, grasslands and farmlands, however the perimeter and patch densities are higher, indicating a higher degree of fragmentation of forest areas. A power law relationship was found among the mean patch areas and perimeters of all the landscape elements, with a fractal dimension of 1.30, indicating a low degree of patch perimeter complexity in the landscape. The Shannon index of landscape diversity were ranked as follows: element type area (2.262) element type perimeter (2.435) < element type patch number (2.675), while all were smaller than that of equal probability (2.940). All of these results emphasize the highly fragmented condition of the forest landscape in this montane region. |
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| Keywords: | Beijing Donglingshan montane region Landscape pattern Landscape fragmentation |
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