植物生态化学计量学的全球格局综述

Global pattern of plant ecological stoichiometrics characteristics

生态化学计量学是研究生物体在生态相互作用过程中多种化学元素平衡关系的一门科学,由于其综合了物理、化学和生物学的相关原理,因此在综合研究生态系统各个层次中元素的流动方面具有较大优势。综述了海洋植物、陆生植物、水生植物、植物细根及凋落物化学计量学特征及其驱动因素,结果表明,不同类型植物化学计量学特征差异较大,并不存在一个普遍的最佳比例,而是受到各种外界和内在的因素影响。研究不同类型植物化学计量学的时候需要综合考虑植物自身组织结构、生长发育阶段、器官功能等内在因素和外界气温、降水、营养条件等外在因素,还需要考虑各因素之间的相互作用造成的影响。

The ecological stoichiometry is a discipline that studies the interactions among multiple elements in organisms across different ecological scales. It has great advantage in integrated study of element flow among different levels of ecosystem,due to its combination of the relevant principles of physics,chemistry and ecology. This study reviewed the stoichiometric characteristics of marine plants,terrestrial plants,aquatic plants,fine roots,litterfall,and their driving factors. The results indicate that the stoichiometric characteristics vary among different types of plants. Due to various external and internal affecting factors,there were no universally accepted optimal ratios. We should consider both internal factors such as their organizational structure,growth stage and organ function and external factors such as annual temperature,precipitation,nutrient,etc. when studying stoichiometric characteristics of different types of plants.