摘要
在新疆塔里木河中游轮台县胡杨林自然保护区内设置0.5hm2的样地,应用相邻格子法进行每木调查获取野外资料,研究灰杨种群径级结构和空间格局特征。结果表明:灰杨种群幼苗、幼树极度缺乏,中、大龄个体较多,其径级结构呈中间大、两头小的壶形,属衰退型种群,其生存发展前景堪忧。灰杨种群空间格局符合聚集分布,随发育进程其空间格局由随机向聚集型转变,大树阶段聚集强度逐渐减弱。种群不同发育阶段的空间分布格局差异与物种本身的生物、生态学特性有关,而且与物种的生境密切相关。
0.5hm^2 plots were established in natural Populus euphratica Oliv forest in the middle reaches of Tarim river, Luntai county, XingJing province and field data were obtained by investigating with contiguous grid quadrate method. The spatial distribution pattern and size class structure of Populus pruinosa were studied. The result showed resources of seedling and sapling were lack and media and large trees were abundant, Size class structure of P. pruinosa population was pot shape and belong to the type of declining population. It was weak ability in natural regeneration and has large difficult to live in the future. Spatial distribution pattern of P. pruinosa population conformed to clumped distribution. The distribution patterns of different development stages of P. prninosa population transformed from random to clumpe distribution with age development and aggregated intensity gradually decreasing in large tree stage. The differences of spatial distribution pattern at different development stages were closely related to ecological and biological characteristics of species and it's environment.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2009年第11期182-185,共4页
Journal of Arid Land Resources and Environment
基金
国家重点基础研究规划前期研究专项(2008CB417216)
新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室开放课题(BR0603)
中国科学院西部之光项目(RCPY200807)资助
关键词
塔里木河中游
灰杨
种群
径级结构
分布格局
The middle reaches of Tarim river
Populus pruinosa Sehrenk
population
size class structure
spatial distribution pattern