水生态学杂志2024，Vol.45Issue(4)：9-18,10.DOI:10.15928/j.1674-3075.202404220149
河流溶解无机碳稳定碳同位素示踪技术及其在中国河流碳循环研究中的应用
Reviews on Stable Isotopic Tracing Techniques of Riverine Dissolved Inorganic Carbon and Its Applications in the Study of Carbon Cycle in Chinese Rivers
摘要
Abstract
Dissolved inorganic carbon(DIC)in rivers is an important component of the global carbon cycle.The stable carbon isotope of riverine DIC(δ 13CDIC)has been extensively used to identify the sources,migration and transformation processes of carbon in river basins.In this study,we systemati-cally reviewed the influencing factors and change mechanisms of δ 13CDIC in rivers based on the latest relevant researches.It has been demonstrated that δ 13CDIC can faithfully and sensitively reflect the en-vironmental characteristics of watersheds and various surface processes,making it a useful tool for re-constructing the biogeochemical processes within the watershed carbon cycle.However,due to the complexity of carbon sources and migration and transformation processes in rivers,many details re-garding the influencing mechanisms of riverine δ 13CDIC remain unclear.We also summarized the spa-tial distribution patterns and influencing mechanisms of δ 13CDIC in China's rivers based on the report-ed δ 13CDIC data from major Chinese rivers.It has been found that the δ 13CDIC values displayed a spa-tial pattern of"high in the west and low in the east",basically reflecting the spatial distribution char-acteristics of geology,climate,and ecological environments in China.The δ 13CDIC values in rivers of the Tibetan Plateau were remarkably higher than those in other regions,and the underlying mecha-nism for this discrepancy requires further investigation.Finally,we proposed suggestions for future studies,and it is suggested to combine the use of δ 13C and radiocarbon isotope(Δ 14C),and strength-en the basic theoretical research on the stable carbon isotope fractionation of dissolved inorganic car-bon in water bodies.关键词
河流溶解无机碳/稳定碳同位素/流域过程/人类活动/中国河流Key words
riverine dissolved inorganic carbon/stable carbon isotope/watershed processes/human activities/rivers in China分类
资源环境引用本文复制引用
武恩鹏,孙会国,刘文景,徐志方..河流溶解无机碳稳定碳同位素示踪技术及其在中国河流碳循环研究中的应用[J].水生态学杂志,2024,45(4):9-18,10.基金项目
国家重点研发计划项目(2020YFA0607700) （2020YFA0607700）
国家自然科学基金项目(41877402) （41877402）
中国科学院青年创新促进会资助项目(Y2023014). （Y2023014）
