兰科植物种群动态研究进展

Research advances in population dynamics of Orchidaceae

兰科植物种群动态研究中,种群统计学分析能够很好地揭示植物个体在时空上的变化,是研究种群动态的核心.在自然生境中,许多附生兰科植物更倾向于离散或斑块状分布,可以通过集合种群研究分析斑块之间个体的基因流动,判断物种种群保护的规模.长期的种群动态研究能够获得兰科植物生活史和种群动态方面的可靠信息,以及一定环境条件下其时空波动及与种群功能之间的关系;短期的研究能够更好地理解具有结构性的独立植株与其所处的群落间的关系.本文根据种群生态学原理以及兰科植物的生态特点,从种群的密度及分布、种群统计学、种群的调节、集合种群和种群生存力分析(PVA)模型等方面阐述了国内外兰科植物种群动态研究进展.

In the study of population dynamics of Orchidaceae,demographic analysis can make us better understand the spatiotemporal variation of plant individuals,the core of the population dynamics study.Nevertheless,many orchid species have an epiphytic or lithophytic habit,which predisposes them to a discrete or patchy distribution.In this case,metapopulation study is a good method to judge the protective scale of the population by analyzing the extent of gene flow among patches.In addition,long-term observation is needed to obtain reliable information on the life history and population dynamics of Orchidaceae,and to understand the relationships between the spatiotemporal variation and functioning of orchid population in certain environmental conditions.As for the short-term study,it＇s essential for a better understanding of the relationships between the structurally dependent plants and the communities in which they are fund.This paper reviewed the research advances in the population dynamics of Orchidaceae from the viewpoints of the population ecology and ecological characteristics of Orchidaceae.