欢迎访问林业科学,今天是

林业科学 ›› 2009, Vol. 12 ›› Issue (8): 1-8.doi: 10.11707/j.1001-7488.20090801

• 论文 •    下一篇

基于栅格数据的沙漠-河岸过渡带白刺沙堆空间格局分析

杨晓晖1 于春堂2 慈龙骏1   

  1. 1.中国林业科学研究院林业研究所 国家林业局林木培育重点实验室北京 100091;2.北京林业大学水土保持学院北京 100083
  • 收稿日期:2007-07-16 修回日期:2009-06-26 出版日期:2009-08-25 发布日期:2009-08-25
  • 通讯作者: 慈龙骏
  • 基金资助:
     

Grid-Based Spatial Pattern of Nitraria tangutorumSand Mounds in Desert-Riverine Ecotones

Yang Xiaohui1,Yu Chuntang2,Ci Longjun1   

  1. 1.Key Laboratory of Tree Breeding and Cultivation of State Forestry AdministrationResearch Institute of Forestry,Chinese Academy of ForestryBeijing 100091; 2.College of Soil and Water Conservation,Beijing Forestry UniversityBeijing 100083
  • Received:2007-07-16 Revised:2009-06-26 Online:2009-08-25 Published:2009-08-25
  • Supported by:
     

摘要:

在详细介绍基于栅格数据的植物空间格局分析方法的基础上,以鄂尔多斯高原北缘沙漠-河岸过渡带上的2种不同气候类型区的白刺沙堆为例,采用g函数和L函数对沙堆的空间格局进行分析。结果表明: 无论是所有沙堆还是面积大小不同的沙堆均以聚集分布为主,这可能是沙漠生态系统中庇护植物效应的反映,基于栅格的空间格局分析方法较概化点格局分析方法所反映的近距离聚集程度明显;双变量分析结果显示在2种气候类型区内不同大小的白刺沙堆间存在着不同程度的竞争,这种竞争在干旱区的巴拉贡表现得更为明显,而基于栅格的空间格局分析方法和概化点格局的分析方法则在较远距离得出不同的结果,其原因有待于进一步探讨。基于栅格的空间格局分析方法作为一种新的方法,更加适合在植物比较稀疏的干旱半干旱地区应用遥感技术来研究植物的空间格局。

 

关键词: 白刺沙堆, 栅格数据, 空间格局分析, 点对相关函数, Ripley L函数, 干旱半干旱区

Abstract:

This paper introduced a grid-based point pattern analysis method and analyzed the spatial pattern of Nitraria tangutorum sand mounds in desert-riverine ecotones,Ordos Plateau,using pair correlation function and Ripley L function. The results showed that the total mounds and different size mounds were clumped,which might result from the nursing effects of the desert ecosystem on plants. Grid-based method showed stronger aggregating tendency at small scale than point approximation method. Bivariate analysis results showed there existed different degree of competition between mounds with different sizes in two climatic zones,and a stronger competition appeared in arid Balagong area. The two methods produced different results at large scale, which cannot be explained clearly yet. Grid-based method,as a new analysis method for spatial pattern,was more suitable for sparse plant pattern analysis in arid and semi-arid areas using remote sensing data.

 

Key words: Nitraria tangutorum sand mounds, grid data sources, spatial pattern analysis, pair correlation function, Ripley L function, arid and semi-arid areas

中图分类号: