Spatial Heterogeneity and Variabilit

Spatial Heterogeneity and Variability of a Large-Scale Vegetation Community Using a Power-Law Model

Spatial heterogeneity and stability are fundamental indices for describing vegetation communities. The spatial distribution characteristics of the vegetation in Nenjiang region of northeastern China were evaluated using a variance power-law model. The data fits the model well with estimates given for the levels of heterogeneity for not only single species but also the community as a whole. The linear regression indicates that the species in the community exhibit a consistently organized spatial pattern, as is often discovered in field surveys but rarely seen in artificial systems. The species deviations from the regression line, which exhibit a leptokurtic distribution, may reflect the variability of the community. Thus, the model provides a general tool for management and regulation of ecosystems, especially where there is human disturbances.

作 者： Song Zhiyuan Huang Daming SHIYOMI Masae WANG Yusheng TAKAHASHI Shigeo YOSHIMICHI Hori YAMAMURU Yasuo CHEN Jun   作者单位： Song Zhiyuan,Huang Daming(Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing 100084, China)

SHIYOMI Masae,YOSHIMICHI Hori,YAMAMURU Yasuo,CHEN Jun(Faculty of Science, Ibaraki University, Bunkyo 2-1-1, Mito 310-8512, Japan)

WANG Yusheng(College of Animal Science, Northeast Agricultural University, Harbin 150030, China)

TAKAHASHI Shigeo(National Institute of Livestock and Grassland Science, 768 Senbonmatsu, Nishinasuno, Tochigi 329-2793, Japan) 

刊 名： 清华大学学报（英文版）  EI 英文刊名： TSINGHUA SCIENCE AND TECHNOLOGY  年，卷(期)： 2005 10(4)  分类号： Q94  关键词： power-law model   spatial heterogeneity   community variability   leptokurtic distribution   resilience  

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