高级检索+
何艳华, 闫明, 武丽君, 张直峰, 毕润成. 山西霍山白桦种群不同龄级立木的点格局分析[J]. 植物科学学报, 2011, 29(6): 662-667.
引用本文: 何艳华, 闫明, 武丽君, 张直峰, 毕润成. 山西霍山白桦种群不同龄级立木的点格局分析[J]. 植物科学学报, 2011, 29(6): 662-667.
HE Yan-Hua, YAN Ming, WU Li-Jun, ZHANG Zhi-Feng, BI Run-Cheng. Spatial Pattern Analysis of Individuals in Different Age-classes of Betula platyphylla in Huoshan Mountain of Shanxi Province[J]. Plant Science Journal, 2011, 29(6): 662-667.
Citation: HE Yan-Hua, YAN Ming, WU Li-Jun, ZHANG Zhi-Feng, BI Run-Cheng. Spatial Pattern Analysis of Individuals in Different Age-classes of Betula platyphylla in Huoshan Mountain of Shanxi Province[J]. Plant Science Journal, 2011, 29(6): 662-667.

山西霍山白桦种群不同龄级立木的点格局分析

Spatial Pattern Analysis of Individuals in Different Age-classes of Betula platyphylla in Huoshan Mountain of Shanxi Province

  • 摘要: 以山西霍山地区的先锋树种之一白桦(Betula platyphylla)为研究对象,在霍山七里峪林场典型地段设置一个50 m×50 m的样方,应用点格局分析方法对其不同龄级(Ⅰ级、Ⅱ级、Ⅲ级和Ⅳ级)个体的分布格局及相互关系进行了研究。结果表明:(1)白桦种群不同龄级的个体间密度也不相同,中间龄级Ⅱ级(7 cm21 cm)之外,其余龄级间基本都是小尺度下负关联,并随尺度的增大关联性逐渐变得不显著。

     

    Abstract: Betula platyphylla is a pioneer plant and is distributed intensively in Huoshan mountain.One 50 m×50 m quadrat was established in Qiliyu from which we recorded the DBH of each individual and the spatial points of all individuals were mapped.The data were analyzed by point pattern analysis.All individuals were divided into four DBH classes:DBH Ⅰ(DBH≤7 cm);DBH Ⅱ(7 cm21 cm).The results of this study showed:(1)The densities of four age-classes varied in the order:age-class Ⅱ>age-class Ⅲ>age-class Ⅰ>age-class Ⅳ.The middle age-classes Ⅱ and Ⅲ had many more individuals than age-classes Ⅰ and Ⅳ,which indicated that the population was currently in decline.(2)The individuals of all age-classes focused on clumping distribution in space,except the age-class Ⅰ.The feature of clumping distribution became more significant with increasing age.(3)The relationships between individuals in different age-classes were significantly correlated with each other on a small scale,but became non-significant with increasing scale,except for age-classes Ⅰ and Ⅱ,age-classes Ⅱ and Ⅲ,and age-classes Ⅱ and Ⅳ.

     

/

返回文章
返回