中文摘要：

采用立木级法研究华北驼绒藜种群的大小级结构，利用各龄级的存活数编制种群静态生命表和存活曲线，构建时间序列预测图对种群数量动态过程进行预测，利用生活史特征观察结果分析其生殖对策，探讨了生殖特性与种群动态的关系。结果表明：华北驼绒藜种群幼龄和老龄级个体数较少，中龄级个体数量较多，呈稳定或衰退趋势；种群生命表和存活曲线的分析表明，尽管生境条件不同，但存活曲线基本接近DeeveyⅢ型；种群数量的时间序列预测表明，华北驼绒藜种群会随时间推移，呈现老龄级株数先增加后减少的趋势，种群稳定性长期维持困难；生活史特征表明，华北驼绒藜在长期进化过程中形成了兼具r-对策和k-对策的双重特性来维持种群的相对稳定。良好的生殖适应性是物种发展的关键，华北驼绒藜种群年龄结构、生命表、存活曲线以及时间序列预测图反映出其种群数量动态与生殖特性具有密切的相关性，传粉系统效率低、胚胎发育过程营养失调、种子向幼苗的转化率低以及种群更新对母株的依赖性强等生殖生物学特性与种群动态相吻合；生境恶劣和人为干扰也成为其种群发展的制约因素。

英文摘要：

In this paper, the size class structure and the static life table and survival curve of Ceratoides arborescens population in North China were figured out, based on the basal diameter size and on the surviving number in each size-class and the number of filial generations. A time sequence prediction chart was established to predict the numeric dynamics of the population, and the population＇ s reproductive strategy was analyzed. The relationships between the numerical dynamics and reproductive characteristics of the population were also discussed. The age structure of the population showed that both young and old individuals were few, while middle-aged individuals were relatively rich. The analysis of the life tables and survival curves indicated that the survival curve of the population belonged to Deevey Ⅲ. Time sequence prediction suggested the number of old individuals would be increased at the beginning, and decreased over time. All these life-history traits suggested that the C. arborescens population in North China had some characteristics with both r- and k-strategies. Reproductive fitness played a critical role in the species＇ development. The species＇ reproductive strategies were related to the numerical dynamics of C. arborescens population characterized by age structure, life table, survival curve, and time sequence prediction figure. The dynamics of the population coincided with its reproductive biological characteristics, such as low efficiency of pollination system, malnutrition during embryonic development, and low conversion rate from seeds to seedlings, and the population recruitment depended severely on adult plants. Hostile environments in the habitat and human disturbance were also the main factors restricting the population development.