天然次生林群落中刺五加种群生态学的研究

【作者】 臧润国；

【导师】 祝宁； 陈大珂； 王义弘；

【作者基本信息】 东北林业大学 ， 生态学， 1990， 硕士

【摘要】 本文通过调查和试验,对天然次生林群落中的刺五加种群生态学进行了较为细致的研究。研究结果表明:刺五加种群是一个进展种群将随着次生林的进展演替而发展。刺五加种群的高度结构与径级结构的变化都与群落环境以及本身的年龄结构特点有关。应用生命表与生殖力表能很好地反映刺五加种群的动态与生死过程,刺五加种群的存活曲线属于Deevey-Ⅲ型。与生命表和生殖力表相对应,刺五加种群的生殖值的动态变化趋势与生命表中所反映的刺五加种群动态趋势相一致,根据K_X及V_X的变化趋势,可将刺五加种群的动态变化过程分为三个阶段,即出生竞争期,相对稳定增长期和逐渐衰老期。本文通过应用Leslie矩阵模型来预测刺五加种群的未来动态做了尝试。对刺五加种群构筑型的调查表明,刺五加的构筑型是其种群在长期进化过程中形成的一种固有生物学特性,但这种特性也多少受种群所处群落环境的影响。刺五加无性系种群的分布格局属于聚集型。本文还对刺五加无性系内分生小株的分布进行了探讨,设计了特殊的调查方法。刺五加种群的种子生态学特殊性与种群所在群落的稳定性有关。本文中刺五加种群生殖力表的编制方法与一般植物种群不同,对类似无性系植物种群的研究具有重要的参考价值。更多还原

【Abstract】 Through investigation and experiment, the population ecology of Acanthopanax senticosus in natural secondary forest communities has been seriously studied in this thesis. The results show that A.sentieosus population is a developing population, which will develop with the developing succession of the secondary forests. The height structure and diameter structure of A.senticosus population relate with community environments and with its own age structure characteristics. The life table and fecundity schedule can well reflect the dynamic processes of the population. The survivorship cuerve of A. senticosus population belonges to the Deevey-Ⅲ type. Corresponding to life table and fecundity schedule of the population, the dynamic trend of reproductive value (V_X) of A. senticoaus is similar to that reflected in the life table. Based on the changing trends of K_X (killing power) and V_X ,the dynamic process of A sent-icosus population can be divided into three phases, that is the recruitment and competition period, comparatively stabie increasing and gradually aging period. It has been tentatively discussed to predict future dynamicprocessesof A. senticosus population with the Leslie Tiatrir model. The architecture characteristics of the population has also "been investigated. The results show the’: the architectures of A. senticosus are indigenous copulation characteristics, which have been formed through long term evolutionary processes, "but are more or less affected by community environments. The distribution pattern of A. senticosus clones belonges to the segregated type. And that for ratnets in the clones has 13lso been discussed. A special investigation method has been designed. The seed ecology properties of the population relate with the stabilities of communities the population lodged in 3?he method for making the fecundity schedule of the population is different from that for ordinary plant populations. It has an important reference value for the study of similar clonal plant populations.更多还原