摘要
通过计算种群空间分布格局的经典指数对拐棍竹(Fargesia robusta)无性系种群在不同取样尺度上的空间分布格局和聚集强度进行了研究。利用地理信息系统计算了不同龄级分株与其他龄级分株的平均距离,探讨了分株年龄与空间分布的关系。结果表明:①拐棍竹无性系种群呈聚集分布;②种群的聚集分布的强度随着取样尺度的增大而减弱;③分株间的平均距离随龄级差距的增大而增大。
Umbrella bamboo （Fargesia robusta） is one of the major species of bamboos on which giant pandas feed in Wolong Nature Reserve. In this article, studies were made of the distribution pattern of umbrella bamboo clones by using a t test of Dispersal Index （ c）, F test of Morisita＇s Index （ I）, Negative Binomial index （K）, Lloyd＇s Index （m） and Patch Area Index （PAI） across different block sizes. Analysis was also made of clumping intensity of umbrella bamboo clones in different block sizes by using Negative Binomial Index, Lloyd＇s Index and Patch Area Index. Then the average distance was computed be- tween different age classes of umbrella bamboo ramets by using GIS software, and the relationship was an- alyzed between age and distribution of umbrella bamboo ramets. The results indicated that：（1） umbrella bamboo clones were distributed in a clumped pattern, （2） the clumping intensity of umbrella bamboo clones decreased with increasing block size, （3） the average distance between different age classes of umbrella bamboo ramets increased with increasing age gap.
出处
《四川林业科技》
2012年第1期14-18,共5页
Journal of Sichuan Forestry Science and Technology
基金
大熊猫国际合作资金项目(SD0631)
关键词
拐棍竹
无性系
种群
空间格局
聚集强度
分株距离
Umbrella bamboo （ Fargesia robusta）, Clone, Population, Spatial pattern, Clumping intensity, Distance between ramets
