欢迎访问《生态学杂志》官方网站,今天是 分享到:

生态学杂志

• 研究报告 • 上一篇    下一篇

皖北石灰岩山地青檀种群不同发育阶段的点格局分析

张兴旺1**,张小平2,郭传友1,张强1   

  1. 1淮北师范大学生命科学学院资源植物生物学安徽省重点实验室, 安徽淮北 235000; 2安徽师范大学 安徽省重要生物资源-保护与利用研究重点实验室, 安徽芜湖 241000)
  • 出版日期:2013-03-10 发布日期:2013-03-10

Point pattern analysis of Pteroceltis tatarinowii population at its different development stages in limestone mountain area of north Anhui, East China.

ZHANG Xing-wang1**, ZHANG Xiao-ping2, GUO Chuan-you1, ZHANG Qiang1   

  1. (1Key Laboratory of Resources and Plant Biology of Anhui, School of Life Sciences, Huaibei Normal University, Huaibei 235000, Anhui, China; 2Key Laboratory of Conservation and Employment of Biological Resources of Anhui, Anhui Normal University, Wuhu 241000, Anhui, China)
  • Online:2013-03-10 Published:2013-03-10

摘要: 基于皖北石灰岩山地青檀次生林的样地调查数据,采用空间代替时间和点格局Oring统计法,研究了青檀种群的径级结构、不同发育阶段的空间分布格局及其相互关联性。结果表明:(1)不同样地青檀种群的径级结构大体呈倒“J”型,各径级均有个体分布,但主要集中在幼苗、幼树阶段,中树和大树较少,种群均属增长型。(2)幼苗、幼树和中树在个别小尺度上呈现出明显的聚集分布,且皇藏峪种群的聚集强度显著高于相山种群;随着尺度的增加,个体趋于随机分布。成树阶段的青檀个体均表现为随机分布或接近均匀分布。(3)各发育阶段间的空间关联主要表现在中、小尺度上,随着空间尺度的增加,空间关联性不显著。青檀种群结构和空间格局主要受群落生境的异质性、自身生物学特性(尤其是克隆繁殖)以及人为活动的干扰等因素影响。

关键词: CO2浓度增高, 水稻, 稗草, 生长, 产量, 竞争

Abstract: Based on the investigation data from the sampling plots of Pteroceltis tatarinowii secondary forest in limestone mountain area of north Anhui, and by the methods of space substituting time and Oring statistics, this paper studied the diameter-class structure and the spatial distribution pattern and association of the P. tatarinowii population at its different development stages. In the plots, the diameter-class structure of P. tatarinowii population presented an invert “J” shape, and the individuals, mainly seedlings and saplings but fewer medium and mature trees, were distributed in each diameter-class, showing a stablegrowth type of the population in different habitats. The seedlings, saplings, and medium trees exhibited an obvious clumped distribution at some small spatial scales, and the aggregate intensity of Huangcangyu population was significantly higher than that of Xiangshan population. With the increase of spatial scale, the individuals tended to distribute randomly. The individuals at mature stage all exhibited random or approximately uniform distribution. The spatial association of the population at different development stages was mainly at medium and small scales, and, with the increase of the scale, the spatial association turned to be not significant. It was suggested that the diameter-class structure and spatial distribution of the P. tatarinowii population were mainly affected by the habitat heterogeneity, population’s itself biological properties (especially clonal reproduction), and human disturbances.