湖泊水生植物稳定碳同位素分馏机制与应用研究进展

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 湖泊水生植物稳定碳同位素分馏机制与应用研究进展 DOI: 10.5846/stxb201903060419 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 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） Mechanisms of stable carbon isotope fractionation of aquatic plants and the research advances of application Author: Affiliation: Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 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。 Abstract: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 the δ13C of aquatic plants. And, there are differences in selecting of organic components of plants when using δ13C of aquatic plants to study lake environmental changes at different time-space scale. The selection of proper component is crucial for interpreting the relationship between δ13C in the aquatic plants and environmental changes. Taking the typical macrophytes in Taihu Lake as an example, we analyzed the values of δ13C in different components of macrophytes and its response to environmental changes. The results showed that there was significant difference of δ13C among different components of aquatic plants and their response to environmental factors. Therefore, it is necessary to select proper components of aquatic plants for analyzing δ13C to study the environment changes in lakes. 参考文献 相似文献 引证文献