碳同位素在湿地碳循环研究中的应用及进展

Applications of carbon isotopic method in wetland carbon cycle and related research advances

湿地碳库是区域生态系统中最重要的碳库之一,湿地碳循环是全球碳循环的重要环节。在湿地碳循环研究中,传统方法越来越不能满足人们对湿地中碳循环微观机理的了解,而碳同位素方法因其特殊的物源和过程示踪价值成为湿地碳循环研究的重要手段。本文从湿地碳循环的主要研究对象和基本研究方法出发,讨论了碳同位素方法的基本原理及其在碳循环研究中的优势,分析了碳同位素方法在湿地生物过程、水体、沉积物和土壤以及温室气体排放等方面的应用,归纳总结了碳同位素在我国湿地生态系统碳循环研究中的不足及未来发展方向。

Wetland carbon pool is one of the important carbon sinks in regional ecosystems,while wetland carbon cycle is an important link in global carbon cycle.However,in the researches of wetland carbon cycle,traditional methods cannot meet our requirements for investigating microscopic mechanisms.Carbon isotopic method,due to its special merit in providing source-and process information,has been used as one of the most important tools,helping us probe more detailed mechanisms of wetland carbon cycle.Aiming at the main objects and the basic methods in wetland carbon cycle research,this paper introduced the basic principles of carbon isotopic method and its advantages in carbon cycle research,and summarized the applications of this method in researching wetland biological processes,water body,sediment,and soil,as well as the greenhouse gases emission from wetland.The deficiencies of carbon isotopic research in wetland ecosystem carbon cycle in China and the future directions of this research were also discussed.