杭州五云山米槠种群幼苗大小结构及空间分布格局研究

生态学杂志 ›› 2003, Vol. ›› Issue (5): 35-39.

杭州五云山米槠种群幼苗大小结构及空间分布格局研究

谢佳彦¹, 邓志平²

1. 浙江海洋学院, 舟山, 316004;
2. 杭州市园文局钱江管理处, 杭州, 310008

收稿日期:2001-06-07 修回日期:2001-06-13 出版日期:2003-05-10

Spatial pattern and size structure of Castanopsis castanopsis population in Wuyun Mountain

XIE Jiayan¹, DENG Zhiping²

Zhejiang Ocean Institute, Zhoushan 316004, China

Received:2001-06-07 Revised:2001-06-13 Online:2003-05-10

摘要/Abstract

摘要： 采用相邻格子法研究了杭州五云山米槠种群幼苗的大小结构,分析了不同立木级幼苗的死亡率及死亡动态和原因.采用"方差/均值"法,Lloyd聚块性指标m^*/m等指数测定了各立木级米槠幼苗的空间分布格局,并探讨了用不同样方取样情况下空间格局的变化情况.结果表明,该区米槠幼苗库比较丰富,平均3.3株·m^-2,大小结构呈显著的金字塔型,表明种群为增长型种群.各大小级幼苗死亡率不同,从Ⅰ级到Ⅴ级呈波状起伏,有两个死亡高峰.采用不同样方取样均表明种群分布格局为集群分布.米槠幼苗种群的集群分布主要是由米槠种子的散布特性所致,不同大小级幼苗分布格局的变化是种内种间竞争的结果.

关键词: 杂草稻, 落粒粳, 生物学, 抗逆境特性

Abstract: The size structure and spatial pattern of seedlings of Castanopsis carlesii Hayata, were studied with the contiguous grid quadrat method. The causes and dynamics of the mortality of different grade of seedlings were analysed. The spatial pattern of each grade of seedlings was tested with"v/m ratio"," Morisita’s dispersion index", and "Lloyd’s patchiness index" etc. The variation of the spatial pattern sampled with different quadrats is discussed.It showed that the seedling bank of C.carlesii(Hemsl.)Hayata population in this area was abundant, with 3.3 seedlings per m^-2, and the size structure was a typical pyramid shape, which indicated a developing population. Each grade of seedlings had respective mortality. From gradeⅠto grade Ⅴ, the curve of mortality had two peaks. Analysis of the seedlings sampled with different quadrats showed an aggregated distribution pattern. The C.carlesii(Hemsl)Hayata seedling population’s aggregated distribution pattern was primarily due to the dispersion character of the seeds.The differences among all size grade of seedlings were due to the interspecific competition.

Key words: Weedy rice, Luolijing (Oryza sativa), Biology, Stress-resistance

中图分类号:

Q948.11

谢佳彦, 邓志平. 杭州五云山米槠种群幼苗大小结构及空间分布格局研究[J]. 生态学杂志, 2003, (5): 35-39.

XIE Jiayan, DENG Zhiping. Spatial pattern and size structure of Castanopsis castanopsis population in Wuyun Mountain[J]. cje, 2003, (5): 35-39.

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