Fractal Analysis on the Distribution Patterns of Tamarix Chinensis Under Environmental Gradients of Different Water Table Depth

HE Qiang; CUI Bao-shan; HU Qiao-mu; YANG Shu-qian; ZHAO Xin-sheng

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Fractal Analysis on the Distribution Patterns of Tamarix Chinensis Under Environmental Gradients of Different Water Table Depth

- Fractal Analysis on the Distribution Patterns of Tamarix Chinensis Under Environmental Gradients of Different Water Table Depth
- Bulletin of Soiland Water Conservation Vol. 27, Issue 5, Pages: 70-74(2008)
- 作者机构：
  
  北京师范大学环境学院环境模拟与污染控制国家重点联合实验室,北京,100875
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- Published：2008
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HE Qiang, CUI Bao-shan, HU Qiao-mu, et al. Fractal Analysis on the Distribution Patterns of Tamarix Chinensis Under Environmental Gradients of Different Water Table Depth[J]. Bulletin of Soiland Water Conservation, 2008, 27(5): 70-74.
DOI：

HE Qiang, CUI Bao-shan, HU Qiao-mu, et al. Fractal Analysis on the Distribution Patterns of Tamarix Chinensis Under Environmental Gradients of Different Water Table Depth[J]. Bulletin of Soiland Water Conservation, 2008, 27(5): 70-74. DOI：

摘要

利用计盒维数和信息维数两种分形方法分析了黄河三角洲湿地柽柳种群的空间分布特征及其随水深梯度的变化。结果表明

不同水深梯度下柽柳种群分布格局的计盒维数均较大

随着水深的增大而逐渐减小

但变化幅度较小

反映了不同水深梯度下柽柳种群对水平空间的占据程度较大;信息维数总体上随水深的增大而减小

在水深低于-1.55 m范围内

信息维数较大

柽柳种群的微观结构较为复杂

格局强度较高

水深高于-1.55 m时

信息维数较小

柽柳种群的微观结构较为简单

格局强度较弱。水深-1.55 m可能是黄河三角洲湿地柽柳种群分布格局的一个阈值。

Abstract

The distribution patterns of Tamarix chinensis population under the environmental gradient of different water table depth were analyzed using two fractal analysis methods—box dimension and information dimension.The box dimension changed little with different water table depths and kept a high dimension

which means that Tamarix chinensis population may keep a high spatial possessive degree for different water table depth.However

the information dimension in general decreased with the decline of water table depth.When water table depth was below-1.55 m

the information dimension was large

indicating that in this section of water table depth gradient

the micro-structure of Tamarix chinensis population was much complex and the pattern intensity was high.When water table depth was above-1.55 m

the information dimension was generally very small

indicating that the micro-structure of Tamarix chinensis population was very simple and the pattern intensity was low.The water table depth of-1.55 m may be a threshold of the distribution patterns of Tamarix chinensis in wetlands of the Yellow River Delta.

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