植物学报 ›› 2008, Vol. 25 ›› Issue (04): 437-442.

• 实验简报 • 上一篇    下一篇

科尔沁沙地植被恢复中差不嘎蒿种群不同龄级个体的点格局分析

曹晏宁, 史利莎, 韩烁, 侯安燕, 涂凡, 张金屯*   

  1. 北京师范大学生命科学学院, 北京 100875
  • 收稿日期:2007-06-12 修回日期:2008-01-17 出版日期:2008-07-01 发布日期:2008-07-01
  • 通讯作者: 张金屯

Point Pattern Analysis for a Population of Artemisia halodendron in a Kerqin Sandlot

Yanning Cao, Lisha Shi, Shuo Han, Anyan Hou, Fan Tu, Jintun Zhang   

  1. College of Life Sciences, Beijing Normal University, Beijing 100875, China
  • Received:2007-06-12 Revised:2008-01-17 Online:2008-07-01 Published:2008-07-01
  • Contact: Jintun Zhang

摘要: 差不嘎蒿(Artemisia halodendron)主要分布在呼伦贝尔沙地和科尔沁沙地的流动和半固定沙丘上, 是良好的乡土固沙半灌木, 也是退化沙地固定和植被恢复过程中的建群种。点格局分析方法是20世纪末发展起来的多尺度空间格局分析方法。通过对差不嘎蒿种群的点格局分析, 发现差不嘎蒿幼体的空间格局多为集群分布, 在各个尺度上都极为显著, 而随着差不嘎蒿龄级的增加, 其空间分布也逐渐显现为随机分布。差不嘎蒿相邻龄级的空间关系差异不显著, 而间隔龄级间则呈空间负相关。这与其幼体聚集, 成体随机分布的空间格局相一致。

Abstract: Artemisia halodendron is mainly distributed on shifting or semi- fixed sand dunes in the Hulunbeier and Kerqin Sandlands of Inner Mongolia. It is a semi-shrub and a valuable species for sand fixation. A. halodendron is a constructive species for controlling the shiftings and dunes during vegetation restoration. In this study, we used point pattern analysis, a multivariate spatial-pattern analysis method, to examine the spatial pattern of A. halodendron in relation to ground conditions. Young individuals are generally aggregated at all scales, and older individuals display a tendency for random distribution. Individuals of the neighboring age classes show no apparent spatial association, whereas individuals of disjunct age classes show a negative spatial association. This pattern is consistent with the spatial pattern of clustered distribution of young individuals but random distribution of adults.