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首页> 外文期刊>International journal of digital Earth >Improved modeling and analysis of the patch size-frequency distribution of forest disturbances in China based on a Landsat forest cover change product
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Improved modeling and analysis of the patch size-frequency distribution of forest disturbances in China based on a Landsat forest cover change product

机译：基于Landsat Forest Cover改变产品的中国森林紊乱补丁尺寸分布的改进建模与分析

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摘要

Forest disturbances have been altering the ecological properties of ecosystems; meanwhile, disturbance events of varying sizes create different structures and functions for a forest landscape. Therefore, size and frequency are important attributes of disturbances, and their relationship should be studied. We present a hierarchical method through the modeling of the overall trend of the size-frequency distribution and the characterization of the non-constant variances of disturbance sizes at each frequency level. This method was demonstrated to accurately model the sizes as well as the corresponding frequencies; thus, the total disturbed area and number of disturbance patches were both accurately estimated. By applying the method to 13 provinces in China, consistent patterns were revealed by the modeling results and remote-sensing-based product, showing that between 2000 and 2005, forests in most provinces were dominated by moderate disturbances (10 ha < size < 100 ha). Southeastern provinces contain the largest proportion of small disturbances (size < 10 ha), whereas most of the very large disturbances (size > 1000 ha) occurred in the northeastern and northwestern provinces. This study concludes that the proposed method can improve the representation of the size- frequency distribution of forest disturbances.
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  • 作者

    Dan-Xia Song; Chengquan Huang; Tao He; Joseph O. Sexton; Ainong Li; Sike Li; Hao Wu; John R. Townshend;

  • 作者单位

    College of Urban and Environmental Sciences Central China Normal University Wuhan People's Republic of China;

    Department of Geographical Sciences University of Maryland College Park MD USA;

    School of Remote Sensing and Information Engineering Wuhan University Wuhan People's Republic of China;

    terraPulse Inc Gaithersburg MD USA;

    Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu People's Republic of China;

    School of Earth Atmosphere and Environment Monash University - Clayton Campus Victoria Australia;

    College of Urban and Environmental Sciences Central China Normal University Wuhan People's Republic of China;

    Department of Geographical Sciences University of Maryland College Park MD USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地球物理学;
  • 关键词

    Forest disturbance; patch size; remote sensing; forestry;

    机译：森林骚扰;补丁尺寸;遥感;林业;

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