全球变化显著影响南亚热森林生态系统植物的生长和存活，然而，导致森林植物生活史策略发生变化的生理生态学机理尚不清晰。围绕这一核心科学问题，本项目拟从植物生理生态学的角度出发，以叶片光合速率、机械抗性、叶片寿命等植物叶片经济学性状和叶片导水率、叶片水力安全系数和叶脉密度等叶片水力学性状为切入点，结合植物系统发育以及南亚热带森林群落大样地长期物种监测数据和环境因子数据，运用生物统计学和模型模拟的方法，分析植物叶片功能性状与森林植物生活史策略之间的关系，明确影响森林植物生活史变化的关键因子，探究叶片功能性状、植物系统发育和环境因子对南亚热带森林植物生活史差异的相对贡献，揭示群落植物生活史差异的生理机制和本质规律，为预测未来南亚热带森林群落物种的变化趋势提供理论依据，进而为我国森林生态系统的保护和经营管理提供参考。

Previous studies have shown that shifts in plant growth and survival of forest ecosystems were indisputable under the background of global change. However, the physiological and ecological mechanisms underpinning the variation in plant life history strategies are not fully understood. Focusing on this scientific question, based on leaf economic traits (e.g. photosynthetic rate, mechanical strength and leaf lifespan) and leaf hydraulic traits (e.g. leaf hydraulic conductance, hydraulic safety margin and vein density) and the data of species phylogeny, forest community and environmental factors, we try to analysis the relationships between leaf functional traits and plant life history strategies via using the methods of biostatistics and modelling. We plan to find the key traits and environmental factors in affecting plant life history strategies in subtropical forests, and explore the relative contributions of leaf functional traits, species phylogeny and environmental factors to the variation in plant life history strategies. Our study will reveal the physiological mechanisms and essential laws in changes of plant life history strategies in subtropical forests and will likely improve our ability to predict the trends of species shifts in subtropical forests in the face of climate change, thus providing scientific data and new insights into protection and management for forest ecosystems.