Integrative analysis for the relationships between demographic parameters and functional traits of tree communities

为了全面分析树木人口统计学参数与功能性状之间的关系，这些功能性状与光合作用或凋落物分解等生态功能相关，我们建立了（1）树木人口统计学参数数据库，（2）在日本和东南亚的几个古老的和周围的次生林树木功能性状数据库。特别是，我们集中在功能性状和物种的发芽能力的特点之间的关系，这是在以前的研究中缺乏。在日本的小川森林中，我们发现群落中共存的物种之间的再萌发能力差异很大，并且这种能力与物种的耐荫性和物种适应的干扰机制密切相关。这些结果使我们能够将物种再萌发策略纳入森林动态和/或物种共存的机制。

To comprehensively analyze the relationship between tree demographic parameters and functional traits those area associated with ecological functions such as photosynthesis or litter decomposition, we built (1) a database of tree demographic parameters, and (2) a database of tree functional traits in several old-growth and surrounding secondary forests in Japan and southeast Asia. Particularly, we focused on the relationship between the functional traits and the characteristics of species resprouting ability, which is scarce in previous studies. In Ogawa forests in Japan, we found that the resprouting ability varied largely among species that coexist in a community, and the ability is closely related to the species' shade tolerance and disturbance regime the species adapt to. These results enable us to incorporate the species resprouting strategy into the forest dynamics and/or the mechanisms for species coexistence.