淡水生态系统水溶性有机碳对全球变化的响应研究进展  

The response of dissolved organic carbon in freshwater ecosystems to global change: A review

作　　者：黄玮[1] 阮宏华[1] 徐自坤 

机构地区：[1]南京林业大学江苏省林业生态工程重点实验室,南京210037 [2]福建武夷山国家级自然保护区管理局,福建武夷山354300

出　　处：《生态学杂志》2014年第2期518-524,共7页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31170417);江苏省研究生培养创新工程项目(CXZZ_110510)资助

摘　　要：淡水生态系统水溶性有机碳(dissolved organic carbon,DOC)是全球碳循环的重要组成部分,也是淡水生态系统异养生物物质和能量来源,其对全球变化的响应很大程度上影响着全球碳汇的大小和淡水生态系统结构和功能。过去对陆地生态系统碳循环的研究较多,而有关淡水生态系统碳循环,特别是淡水生态系统DOC在全球碳循环中的作用及其对气候变化的响应研究相对缺乏。本文综述了近年全球变化对淡水生态系统DOC的影响,以及淡水生态系统DOC对全球变化的反馈。指出了全球变化各因子对淡水生态系统DOC的影响存在交互作用,各因子的影响程度也会随时间、空间而变化。淡水生态系统DOC对全球变的反馈程度也存在时空变异,但该方面的研究十分有限,反馈机制不十分清楚。基于目前研究,本文提出今后值得深入研究的三个方面,即:(1)扩展研究区域和范围,了解DOC在不同区域淡水生态系统中的动态变化特征;(2)加强全球变化对淡水生态系统DOC的组成和结构特征影响的研究;(3)深入研究淡水生态系统DOC对全球变化的反馈程度和机制。Dissolved organic carbon （DOC） in freshwater is an important component of the global carbon cycle, and is also carbon and energy source for heterotrophs in freshwater. The response of freshwater DOC to global change will affect the size of global carbon sink, and structure and function of freshwater ecosystems. We reviewed the influence of global change on freshwater DOC, and the feedback of freshwater DOC dynamics to climate change. We pointed out that in- teractions among global change factors affected freshwater DOC, and the influencing degrees of global change factors varied with time and space. The feedback of freshwater DOC to global change was also substantially different across time and space. But there is little information re- garding the feedback of freshwater DOC to global change, and much less is known about the feed- back mechanism of freshwater DOC to global change. Based on present researches, more atten- tion should be devoted to the three aspects ： （ 1 ） to expand research areas to understand the tem- poral dynamic characteristics of DOC in freshwater ecosystems in different regions; （2） to better understand the effect of global change on DOC composition and structure in freshwater ecosys- tems ; and （3） to gain better insight into the feedback degree and mechanism of freshwater DOC to global change.

关 键 词：水溶性有机碳 淡水 集水区 全球变化 

分 类 号：P332.7[天文地球—水文科学]