人为干扰强度对村级景观结构特征的影响

    Effect of Human Disturbance Intensity on Characteristics of Village-level Landscape Structure

    • 摘要: 以研究点与村落中心间的距离作为人为干扰强度的划分指标 ,把村落按重度人为干扰、中度人为干扰和轻度人为干扰 3个等级分为中心区、过渡区和基质区 ,分析不同人为干扰强度与村级景观特征的相互关系。结果表明 :随着人为干扰强度的增强 ,多样性指数、相对丰富度指数和均匀度指数均相应增大 ,在中度人为干扰强度区 ,上述 3种指数均最大 ,但优势度指数最小。随着干扰强度的增强 ,与人们生活密切相关的景观类型的分形维数减小 ,斑块的相似性增强。

       

      Abstract: With the distance from the research site to the center of a village as index for grading human disturbance intensity,the village could be divided into three zones,center,transition and base,different in human disturbance intensity,severe,moderate and light,respectively.Analysis was conducted of the relationship between human disturbance intensity and village level landscape characteristics.Results showed that they were closely related.With rise in intensity,the diversity index,relative abundance index and evenness index increased correspondingly,but stayed at peak and dominance index,however,fell to the bottom when the human disturbance was moderate in intensity.With increasing disturbance,the fractal value of landscapes in close relation to human life was getting less,but the similarity of landscape patches enhanced.

       

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