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引用本文:胡恩,张振文,王文科,孙长顺,苏雅玲,刘正文.老碳对水生态系统食物网的贡献.湖泊科学,2018,30(5):1187-1195. DOI:10.18307/2018.0502
HU En,ZHANG Zhenwen,WANG Wenke,SUN Changshun,SU Yaling,LIU Zhengwen.Review on contribution of ancient organic carbon to aquatic food webs. J. Lake Sci.2018,30(5):1187-1195. DOI:10.18307/2018.0502
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老碳对水生态系统食物网的贡献
胡恩1,2, 张振文1, 王文科2, 孙长顺1, 苏雅玲3, 刘正文3,4,5
1.陕西省环境科学研究院, 西安 710069;2.长安大学环境与工程学院, 西安 710069;3.中国科学院南京地理与湖泊研究所, 南京 210008;4.暨南大学生态学系与水生生物研究中心, 广州 510632;5.中国科学院大学中丹学院, 北京 100049
摘要:
传统理论认为,支撑水生态系统食物网的碳主要来自于系统内部的初级生产者,如藻类、大型水生植物等,或者来自陆源输入的新鲜且容易分解的有机质;而部分生物或非生物生产的有机碳,在冰川、冻土等环境中可停留数百年至数千年(定义为老碳),由于储存环境稳定、物理化学性质顽固,难以参与水生生态系统有机碳循环.近年来这一观念不断被挑战.研究表明老碳能够参与水生态系统食物网碳循环:可以被微生物分解利用;被浮游动物、无脊椎动物直接或者间接摄取、或沿着营养级传递至鱼类、水禽等高级消费者.这意味着除了内部初级生产,老碳是支撑水生态系统重要的碳源.本文概述了当前老碳与水生态系统食物网关系研究最新进展和所取得的研究成果,介绍放射性14C同位素技术在水生态学领域的应用,同时提出研究中存在的问题以及未来研究应关注的方向,以期促进我国水生态系统碳循环研究的进一步发展.
关键词:  水生态系统  食物网  老碳  14C同位素技术
DOI:10.18307/2018.0502
分类号:
基金项目:国家自然科学基金项目(31670461)和陕西省博士后基金项目(2017BSHQYXMZZ10)联合资助.
Review on contribution of ancient organic carbon to aquatic food webs
HU En1,2, ZHANG Zhenwen1, WANG Wenke2, SUN Changshun1, SU Yaling3, LIU Zhengwen3,4,5
1.Shaanxi Provincial Academy of Environmental Science, Xi'an 710069, P. R. China;2.School of Environmental Science and Engineering, Chang'an University, Xi'an 710069, P. R. China;3.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;4.Institute of Hydrobiology, Jinan University, Guangzhou 510632, P. R. China;5.Sino-Danish Centre for Education and Research/Sino-Danish College of University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Abstract:
Traditionally, aquatic ecosystem consumers are considered to mainly feed on primary production derived organic carbon (OC) from contemporary photosynthesis(e.g. algae, macrophytes) or on fresh terrestrial OC from watershed that is less refractory than previously thought. Due to structure stability and stubborn physicochemical feature, some biotical or abiotic OC stored in glacier and permafrost systems for hundreds to thousands years (defined as ancient or highly aged OC) may be hardly incorporated into biogeochemistry process in aquatic ecosystems. Recent studies, however, have increasingly revealed that ancient OC may be an important resource for microbes, zooplankton, invertebrates, and higher trophic consumers such as fish and waterfowl and significantly subsidizes food webs of aquatic ecosystems. The ancient OC of aquatic consumers indicates that a shortage of modern primary production may not necessarily limit or constrain the food supply to consumers in aquatic ecosystems. In this paper, we have summarized the research progresses on the relationship between terrestrial ancient OC and aquatic food webs worldwide, introduced the application of 14C technology in aquatic ecology, and pointed out the problems existing in the studies and the direction in the future research. This study will promote the research of carbon cycle of aquatic ecosystems in China.
Key words:  Aquatic ecosystems  food webs  ancient organic carbon  radiocarbon isotope technology
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