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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

查看全文 作　　者：Dan-Xia [1,2]Song;Chengquan [3]Huang;Tao [4]He;Joseph [5]O.Sexton;Ainong [6]Li;Sike [7]Li;Hao [1,2]Wu;John [3]R.Townshend 高影响力作者 机构地区：[1]College of Urban and Environmental Sciences,Central China Normal University,Wuhan,People’s Republic of China;[2]Hubei Provincial Key Laboratory for Geographical Process Analysis and Simulation,Central China Normal University,Wuhan,People’s Republic of China;[3]Department of Geographical Sciences,University of Maryland,College Park,MD,USA;[4]School of Remote Sensing and Information Engineering,Wuhan University,Wuhan,People’s Republic of China;[5]terraPulse,Inc,Gaithersburg,MD,USA;[6]Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu,People’s Republic of China;[7]School of Earth,Atmosphere and Environment,Monash University–Clayton Campus,Victoria,Australia高影响力机构 出　　处：《International Journal of Digital Earth》索引2021年第14卷第2期,共21页高影响力期刊 基　　金：supported by the Natural Science Foundation of China[grant number 41901300];the Fundamental Research Funds for the Central Universities[grant number CCNU19TD002];the Scientific Research Project of Department of Natural Resources of Hubei Province[grant number ZRZY2020KJ01]. 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 ha1000 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. 关 键 词：Forest disturbance patch size remote sensing FORESTRY
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