摘要
针对云南红豆杉种群分布特点,在滇西北云南红豆杉分布集中区域设置了9个20m×20m的调查样地,采用离散分布理论拟合方法,对该地云南红豆杉种群空间分布格局和动态进行了分析。滇西北云南红豆杉种群个体主要集中于Ⅲ、Ⅳ龄级,而幼龄树(Ⅰ和Ⅱ级)极少或没有,说明滇西北野生云南红豆杉种群更新困难。云南红豆杉在5m×5m、5m×10m和10m×10m取样面积上均呈聚集分布,并且种群在不同发育阶段也均呈聚集分布,说明聚集分布是滇西北云南红豆杉种群空间分布的基本属性。
Taxus yunnanensis is an endangered species distributed mainly in southwestern China. Based on the distribution characteristics of T. yunnanensis population, 9 sampling plots, each with an area of 400 m2 were established in the concentrated distribution area in northwest Yunnan to investigate the spatial dis- tribution pattern and dynamics by using discrete distribution theory. The results showed that most of indi- viduals concentrated in size class Ⅲ and Ⅳ, and few or none individuals appeared in size class Ⅰ and Ⅱ , in- dicating that the regeneration of T. yunnanensis was difficult. At different sampling areas, such as 5 m× 5 m, 5 m×10 m and 10 m× 10 m, T. yunnanensis populations all performed the pattern of congregation distribution. T. yunnanensis populations also performed the pattern of congregation distribution at differ- ent age stages, indicating that congregation distribution was the basic attribute of spatial distribution of T. yunnanensis population in northwest Yunnan.
出处
《西北林学院学报》
CSCD
北大核心
2012年第6期131-138,共8页
Journal of Northwest Forestry University
基金
国家林业局948项目(2011-4-03)
云南省科技厅人才培养资助项目(2011CI072)
关键词
云南红豆杉
空间分布
尺度
龄级
Taxusyunnanensis
spatial distribution
scale
age stage
