Fractal Characteristics of Population Canopy Structure of the Mangrove,Bruguiera gymnorrhiza (L.) Lamk

作     者：梁士楚 王伯荪 

作者机构：Key Laboratory of Quantitative Vegetation Ecology Institute of Botany the Chinese Academy of Sciences School of Life Science Zhongshan University Guangzhou 510275 Chuangdong China 

出 版 物：《Marine Science Bulletin》 (海洋通报（英文版）)

年 卷 期：2003年第5卷第2期

页      面：54-61页

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：Supported by grants from Project of NSFC (39860023) 

主　　题：mangrove B. gymnorrhiza population canopy structure fractals 

摘      要：The fractal characteristics of the canopy structure of B. gymnorrhiza population are investigated by fractal dimension analysis in the National Shankou Mangrove Nature Reserve. The 3-year-old branches have box dimensions between 1.22 and 1.55, showing the complexity degree of branching structure and the ability of occupying and utilizing ecological space. It may be considered that fractal dimension provides a useful index for the study of light utilization efficiencies and growth processes of B. gymnorrhiza. Calculated by using the two-surface method, the fractal dimensions for the crown pattern of individuals with ages of 20 to 50 years range from 2.21 to 2.54, indicating that the filling degree of foliage to a tree crown is relatively low and B. gymnorrhiza has the property of a sun plant. Along with the increase of ages of individuals, the filling degree of foliage to a tree crown changes from high to low, and so does the fractal dimension. The box dimensions obtained from the grayscale curves of population canopy are between 1.47 and 1.61. The greater the box dimension, the more loosely organized the canopy spatial structure, and the more the light spots. The canopy structural information and complexity of a population can be effectively captured by box dimensions obtained from canopy grayscale curves.