摘要
为了更好地了解大蜀山大叶榉Zelkova schneideriana种群的数量动态，根据对大叶榉种群的实地调查资料，以种群生命表及生存分析理论为基础，采用空间序列代时间变化的方法，以林木径级结构代替年龄结构，编制大叶榉种群静态生命表，绘制亏损率曲线、存活曲线、死亡率曲线和生存函数曲线．结果表明：大叶榉种群的个体数量主要集中在Ⅰ（胸径为0～5cm）、Ⅱ龄级（胸径为5～10cm）（个体数量比例占72．60％），幼龄个体数量较多；生命过程中的Ⅰ龄级的年龄阶段为死亡高峰，而Ⅳ龄级（胸径为15～20cm）死亡率最小，种群存活曲线趋于Deevey-Ⅲ型;大叶榉生长更新良好，更新方式为种子繁殖，幼龄数量储备充足，结合量化分析为增长型种群．结果表明种群在发展前期出现较大的波动，选择合适的恢复和保存方法为大叶榉更新层个体发育创造适宜的生境是保护该物种的有效途径．
By using the method of ＂spatial sequence as a surrogate for temporal change＂, this paper made an analysis of the size structure of Zelkova schneideriana population in Mountain Dashu. Based on the life table of a population and the theory of survival analysis, a static life table of Z. schneideriana was worked out, its curves of loss rate, survival rate, mortality rate and function value were drawn, and its life process was analyzed. Restilts show that young individuals of this population are dramatically abundant, most of them （72.60%） concentrated in the Age I and II classes （the age of 0～10）; that the population has a peak of mortality in the Age I class and a lowest rate of mortality in the Age IV class, and the survival curve of the population tends to follow the type of Deevey- Ⅲ and that this population grows well and is capable of keeping its population stable through seed germination. To select right rehabilitation and preservation methods for the creation of suitable habitats for the development of Z. schneideriana individuals is an effective way to protect this species.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2009年第3期65-69,共5页
Journal of Central South University of Forestry & Technology
关键词
生态学
大叶榉
种群数量
结构动态
大蜀山
ecology
Zelkova schneideriana
population quantity
structure dynamics
Mountain Dashu
