中国科学院水生生物研究所机构知识库
Advanced  
IHB OpenIR  > 中科院水生所知识产出(2009年前)  > 期刊论文
题名: Preliminary study on fractal character of growth pattern of reed
作者: Cai Qinghua, Zhao Bin ; Pan Wenbin
通讯作者: Inst. Hydrobiol., Chinese Acad. Sci., Wuhan 430072, China
刊名: Acta Hydrobiologica Sinica
发表日期: 1998
卷: 22, 期:2, 页:123-127
收录类别: 其他
英文摘要: The researches about reed (Phragmites communis) growth were mainly concentrated on seasonal dynamics, investigation of large area resource, and comparison of different ecological forms of reed. The study on size distribution of reed, however, was scarcely reported. By means of fractal geometric theory of non-linear science, we studied the fractal character of growth pattern of reed, for the purpose of quantitatively exploring the mechanism of reed growth. The classical method of studying size distribution is to draw histogram and then to fit distribution curve. it is well known, however, that the obtained histogram is strongly depended on the number of class interval and its correspondent width. The determination of rational number and width of class interval is somewhat arbitrary, since it is gotten according to analyst's experience. In general, there are a certain similarity among histograms described at different class number of class interval and width somehow. It implies that we could use the fractal geometry to analyze the relationship among them, and reach more reliable conclusion. The data we used in our analyses is from the monthly sampling in Caogang Lake (114degreeE, 35degreeN), an emergent macrophyte dominated lake in Fengqiu Experimental Area of the Huanghuaihai Plain, Henan Province, P.R. China. The way to calculate ct-actal dimension (FD) of reed growth is box-dimension (BD) and information dimension (ID). Because the longest reed occasionally exceeds 400cm, for the reason of convenience, we define the largest scale S = 400 cm. Halving the scale S until it could recognize each individual reed (S < 1 cm), the relationship between different scale S and the number of samples fallen in each S and their correspondent entropy were calculated, respectively (cf. Tab. 1,2). The slope of each regression is the FD at different growth stages. In order to answer whether the difference between FD at any two different growth stages is significant, t-test was carried out to judge if the regressions are parallel. The common slope of two regressions, i.e., the common FD of reed at any two growth stages was therefore calculated while the functions are parallel (cf. Tab. 3 and 4). The results showed that the difference between 'two samplings in May and those among three samplings in June and later were not remarkable for both BD or ID. It was noted, however, that the difference between samplings in and after May is significant. It was demonstrated that the fractal dimension of size distribution of reed ranged from 0.6235 to 0.8761. The distribution pattern could be statistically divided as two significant periods: the size of reed is quite well-distributed at the beginning of reed growth (fractal dimension > 0.8), but is irregular in the middle and later growth season (fractal dimension < 0.7). These results are benefit to reach the goal of rational use of reed resources and to protect the biodiversity in wetland ecosystem.
ISSN号: 1000-3207
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/17799
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

Files in This Item: Download All
File Name/ File Size Content Type Version Access License
Preliminary study on fractal character of growth pattern of reed.pdf(2251KB)----开放获取--View Download

Recommended Citation:
Cai Qinghua, Zhao Bin; Pan Wenbin.Preliminary study on fractal character of growth pattern of reed,Acta Hydrobiologica Sinica,1998,22(2):123-127
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Cai Qinghua, Zhao Bin]'s Articles
[Pan Wenbin]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Cai Qinghua, Zhao Bin]‘s Articles
[Pan Wenbin]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: Preliminary study on fractal character of growth pattern of reed.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2016  中国科学院水生生物研究所 - Feedback
Powered by CSpace