植物性状种内变异对阔叶红松林性状协作与群落结构的影响

本研究依托于丰林30公顷和凉水9公顷阔叶红松林动态监测样地，探究功能性状及其种内变异对性状协作、群落动态、组成和多样性的影响机制。以丰林样地毛榛子幼苗和成年树为研究对象，探究不同生境、生活史阶段的叶、枝和根的形态、解剖性状的变异、协作和多样性格局；以凉水样地幼苗样方内所有个体为研究目标，探究环境、个体大小对幼苗叶片性状变异、协作格局的影响；运用混合效应模型，揭示个体水平性状对幼苗生长和存活的影响机制；结合个体水平幼苗叶片性状和物种分布数据，探究个体和群落性状分布与环境的关系及生境过滤的作用机制；基于个体和物种水平的功能性状数据，探究性状种内变异对功能多样性及推断群落构建机制的影响。通过以上研究系统性地探究功能性状及其种内变异在个体、种群和群落水平上的变异、协作、群落动态、结构和多样性维持中的角色，研究结果可为东北地区阔叶红松林保护和该地区温带森林对气候变化响应的预测提供科学依据。

Based on the Fenglin 30 ha and Liangshui 9 ha mixed broadleaved-Korean pine forest plots, we examine roles of plant functional traits and their intraspecific variation on the trait correlations, community dynamics, composition and functional diversity. Using the seedling and adult trait data in the Fenglin plot, we explore the patterns of variation, correlations and functional diversity for the morphological and anatomical traits of leaf, branch and root across habitats and life stages. Based on the all seedlings in the Liangshui plot, we explore the effects of environment and seedling size on leaf traits variation and correlations across all species. We used the generalized linear mixed effect models, to examine the effects of individual-level leaf traits on seedling growth and survival. By leaf traits at the individual level, we explore the responses of species- and community-trait values to environmental gradients. By combining the traits at individual- and species-levels, we explore the effects of intraspecific trait variation on functional diversity and community assembly. Based on these projects above, we systematically explore the effects of intraspecific trait values on the variation, correlation, community dynamics, composition, and the maintenance of functional diversity; these results can improve our understanding of the conservation for mixed broadleaved-Korean pine forests and the response of these forests to climate change.