森林植被不同尺度的碳水过程及耦合机制研究进展

Research Progress of Carbon-water Processes and Coupling Mechanisms ofForest Vegetation at Different Scales

[目的]陆地生态系统中的碳循环和水循环是陆地生态系统物质和能量循环的核心,也是连接地圈、生物圈和大气层的纽带。森林植被是陆地生态系统的重要组成部分,是表征陆地碳-水循环的重要变量,在维持生物圈和大气圈的动态平衡中发挥着重要作用。目前,对陆地生态系统中碳-水循环的耦合关系和机制缺乏系统的分析和总结。[方法]从森林植被碳与水过程及其相互作用、植被水分利用和耦合机制的角度,综述了森林植被碳与水循环过程及其相互作用的研究与进展,以及不同空间尺度(叶片到区域/全球尺度)碳-水耦合的定义、方法、进展和展望。[结果]新兴的技术和方法实现了不同尺度碳水过程的高频观测,WUE等耦合指标体系推动了碳水耦合机制的研究和发展。[结论]通过系统阐述植被碳水耦合关系的多尺度整合和碳水耦合机理,为系统认识森林碳水耦合机理和水资源管理提供了理论基础,对未来植被经营管理决策具有重要的科学支撑意义。

[Objective]The carbon and water cycles in terrestrial ecosystems are the core of the material and energy cycles in terrestrial ecosystems,and also the link connecting the geosphere,the biosphere and the atmosphere.Forest vegetation is an important component of terrestrial ecosystems,an important variable characterized the terrestrial carbon-water cycle,and plays an important role in maintaining the dynamic balance of the biosphere and the atmosphere.Currently,there is a lack of systematic analysis and summary of the coupling relationship and mechanism of carbon-water cycle in terrestrial ecosystems.[Methods]This paper summarizes the research and its progress on forest vegetation carbon and water cycle processes and their interactions,as well as the definition,methods,progress and outlook of carbon-water coupling at different spatial scales(leaf to regional/global scales)from the perspectives of forest vegetation carbon and water processes and their interactions,and vegetation water use and coupling mechanisms,respectively.[Results]Emerging technologies and methods have realized high-frequency observations of hydrocarbon processes at different scales,and coupled indicator systems such as WUE have promoted the research and development of hydrocarbon coupling mechanisms.[Conclusion]In conclusion,we have systematically elucidated the multi-scale integration of vegetation carbon-water coupling relationship and carbon-water coupling mechanism,which provides a theoretical basis for the systematic understanding of forest carbon-water coupling mechanism and water resource management,and is of great significance as a scientific support for the future decision-making of vegetation operation and management.