陆地生态系统碳- 水耦合机制初探

doi:10.11820/dlkxjz.2008.01.005

地理科学进展 ›› 2008, Vol. 27 ›› Issue (1): 32-38.doi: 10.11820/dlkxjz.2008.01.005

陆地生态系统碳- 水耦合机制初探

赵风华^1,2, 于贵瑞¹

1. 中国科学院生态系统网络观测与模拟重点实验室,中国科学院地理科学与资源研究所,北京100101;
2. 中国科学院研究生院,北京100039

收稿日期:2007-10-01 修回日期:2007-10-01 出版日期:2008-01-25 发布日期:2008-01-25
作者简介:赵风华(1979-),男,博士生,主要从事陆地生态系统碳、水过程研究.E- mail:zhaofh.04b@igsnrr.ac.cn
基金资助:
中国科学院知识创新工程重要方向项目(KZCX2- YW- 432)资助.

A Review on the Coupled Carbon and Water Cycles in the Ter r estr ial Ecosystems

ZHAO FengHua^1,2, YU GuiRui¹

1. Key Laboratory of Ecosystem Network Observation and Modeling, the Center for Synthesis Research, Chinese Ecosystem Research Network Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China|
2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Received:2007-10-01 Revised:2007-10-01 Online:2008-01-25 Published:2008-01-25

摘要/Abstract

摘要：

陆地生态系统的碳循环和水循环是当前全球变化研究的热点。大量的研究已经表明两者之间具有密切的耦合作用。但是目前对于两者的耦合关系和耦合机制还缺乏系统的分析和总结。本文在综合相关研究的基础上，对陆地生态系统碳- 水耦合的基本过程和基本作用机制作了概括。我们认为陆地生态系统碳- 水耦合过程共包括土壤- 植被节点、植被- 大气节点(气孔节点)、土壤- 大气节点和生化节点4 个碳- 水耦合节点。碳- 水间的生化反应、气孔对光合- 蒸腾的共同控制和优化调控作用、生态系统对碳、水循环的同向驱动机制分别是陆地生态系统碳- 水耦合的生物化学、生物物理学和生态学基础，共同构成了碳- 水耦合的基本作用机制。我们还用水分利用效率(WUE) 概念对碳- 水耦合过程中的碳/水耦合比例关系作了探讨。

关键词: 陆地生态系统, 全球变化, 水分利用效率, 水循环, 碳循环

Abstract:

Carbon and water cycles absorbed much attention in the global change researches. There were many observations indicating that they were robustly coupled in the terrestrial ecosys-tems. Here we reviewed the correlations between carbon and water cycles from leaf to canopy and to larger scales. Moreover, we discussed the general mechanisms of the coupling relationships between carbon and water cycles. The chain between carbon and water cycles was analyzed into four links: soil- plant link, plant- atmosphere link (stomata link), soil- atmosphere link and biochemical link. The causes for the strong correlations between carbon and water could be generalized as three fundamental functions: 1) the chemosynthesis between carbon and water; 2) the stomatal controls on gas exchange and its optimal function; and 3) the common driving forces and similar controls for carbon and water cycles in the terrestrial ecosystems. Water use efficiency defined as the ratio of carbon assimilation to water use also was discussed as a suitable term indicating the quantity relationship between carbon and water.

Key words: carbon cycle, global change, terrestrial ecosystem, water cycle, water use efficiency

赵风华,于贵瑞. 陆地生态系统碳- 水耦合机制初探[J]. 地理科学进展, 2008, 27(1): 32-38.

ZHAO FengHua, YU GuiRui. A Review on the Coupled Carbon and Water Cycles in the Ter r estr ial Ecosystems[J]. PROGRESS IN GEOGRAPHY, 2008, 27(1): 32-38.

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陆地生态系统碳- 水耦合机制初探

A Review on the Coupled Carbon and Water Cycles in the Ter r estr ial Ecosystems

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