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森林资源系统自组织特征研究

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2008年05期
Page:
51-55
Column:
研究论文
publishdate:
2008-09-30

Article Info:/Info

Title:
Research on self-organization characters in forest resource system
Article ID:
1000-2006(2008)05-0051-05
Author(s):
LIU Yi12 SHE Guang-hui1* LIU An-xing3 ZHANG Guo-jiang3
1. College of Forest Resources and Environment Nanjing Forestry University, Nanjing 210037, China; 2. Academy of Forest Inventory and Planning State Forestry Administration, Beijing 100714, China; 3. Monituring Center for Forest Resources Zhejiang Province, Hangzhou 310020, China
Keywords:
Forest resource system Self-organization Fractals l/f noise Zipf law Zhejiang provinc
Classification number :
S757
DOI:
10.3969/j.jssn.1000-2006.2008.05.010
Document Code:
A
Abstract:
Tbe evolution of forest system was a process of self-organization. The impact of human was one of the factors which affected the forest system. Thm’e were three critical indices, i. e., the fractal structure in the dimension of space, the 1/fluctuation in the di~ension of time, and the Zipf law in the dimension of ranking, which could be used to test whether the forest resource system was a self-organized system. According to the data of national forest inventory and furest resource iuventory of Zhejiang province, this paper discusses the three indices. To analyze the fractal structure of space, we divide all the sample plots into 20groups by forest volume. The first group is made up with all the sample plots have volume of O. 5--1. 0m~, and plots with 1. 0--1. 5m3volume make up the second group, and so forth. Then turn the nambers of ever), group into frequency sequence. By studying the relation between volume and frequency, the resuh that the foresl spatial structure obeys power-law and is fractal can be drawn. Next we transform the sequent’e of tlifferent age class vohtme into time series, and find the tiroe series of forest system show l/f fluctuation. The third part, we sort tbe forest volume data of 74unites in Zhejiang province by descending order and get the result that there is Zipf law in the dimension of ranking by analyzing the log-log plot of data. To sum up, forest resource system is inconformity with the three indices. The supposition that forest resource system is a self-organized system can be verified. What’s more, we find that it is feasible to analyze self-orgauization characters by forest inventory data.

References

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Last Update: 2013-05-20