摘要
水生植物是维持湖泊生态系统健康发展的重要基础与支撑。与陆地植物相比,水生植物稳定碳同位素(δ13C)的分馏过程较复杂,为系统的了解水生植物δ13C的分馏过程及其在湖泊现代生态系统和古环境研究中的应用,调研了国内外相关研究进展。总结已有研究表明,水生植物的δ13C主要与其吸收利用的碳源和水体环境要素等密切相关,影响因素较复杂,而且目前在利用水生植物的δ13C研究不同时间尺度上湖泊环境变化时所选用的载体存在差异。植物不同组分样品的选择对解释水生植物δ13C与环境之间的关系至关重要。因此,以太湖典型水生植物为研究实例,探讨了水生植物不同组分稳定碳同位素的分布特征及其对环境因子的响应差异,结果显示水生植物不同组分的δ13C存在一定的差异,而且对环境的响应也不同,未来在利用水生植物δ13C研究湖泊环境变化时对于水生植物样品组分的选择应谨慎考虑。
Aquatic plants are essential for maintaining the diversity and stability of the lake ecosystem.Compared with terrestrial plants,the processes of carbon isotopes(δ13C)chemical fractionation in aquatic plants are more complicated.In order to get a comprehensive and systematic understanding of the processes of carbon isotopic fractionation in aquatic plants and its applications in environmental study,the relevant studies were reviewed.This paper introduced the mechanisms of carbon isotope fractionation and its influencing factors.Besides,the application of aquatic plants carbon isotope in lake ecosystems and palaeoenvironments was also summarized.Previous studies indicated that carbon sources utilization and water parameters are key factors affecting theδ13C of aquatic plants.And,there are differences in selecting of organic components of plants when usingδ13C of aquatic plants to study lake environmental changes at different time-space scale.The selection of proper component is crucial for interpreting the relationship betweenδ13C in the aquatic plants and environmental changes.Taking the typical macrophytes in Taihu Lake as an example,we analyzed the values ofδ13C in different components of macrophytes and its response to environmental changes.The results showed that there was significant difference ofδ13C among different components of aquatic plants and their response to environmental factors.Therefore,it is necessary to select proper components of aquatic plants for analyzingδ13C to study the environment changes in lakes.
作者
刘金亮
薛滨
姚书春
程龙娟
李玲玲
LIU Jinliang;XUE Bin;YAO Shuchun;CHENG Longjuan;LI Lingling(State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《生态学报》
CAS
CSCD
北大核心
2020年第8期27-38,共12页
Acta Ecologica Sinica
基金
国家重点研发计划项目(2019YFA0607100)
国家自然科学基金项目(41573129)
科技部基础性工作专项(2014FY110400)。
关键词
水生植物
δ13C
分馏机制
环境因子
生态系统
aquatic plants
δ13C
fractionation mechanisms
environmental factors
ecosystem
