喀斯特水系氮转化与碳汇耦合研究进展

IF 2.3 Q3 ENVIRONMENTAL SCIENCES
Wenwen Chen, Huan-fang Huang, Haixiang Li, Jianhua Cao, Qiang Li, Yingjie Chen, B. Bai, H. Zeng
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引用次数: 1

摘要

碳酸盐岩基岩区占地球大陆表面积的14%,由于碳酸盐岩矿物风化过程中二氧化碳的消耗,喀斯特水中的碳(C)汇在全球碳循环中起着重要作用。集约化农业和城市化导致水体系统中氮(N)的过量输入,而喀斯特水体中高浓度的无机碳可能会影响氮循环。本文总结了喀斯特地区水体的特征,讨论了高Ca2+含量、高pH、高C/N比条件下的N转化与C循环。碳酸盐具有高溶解度和高溶蚀速率,比非碳酸盐消耗更多的大气和土壤CO2,导致世界范围内岩溶盆地的平均CO2汇高于非岩溶盆地。因此,碳酸盐矿物风化和水生光合作用是CO2吸收的两种主要方式,称为耦合碳酸盐风化。由于岩溶水的碱度和高C/N含量抑制了反硝化和矿化过程,岩溶水环境也起到了N汇的作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Coupled nitrogen transformation and carbon sink in the karst aquatic system: a review
Carbonate bedrock regions represent that 14% of Earth's continental surface and carbon (C) sink in karst water plays an important role in the global C cycle due to the CO2 consumption during carbonate mineral weathering. Intensive agriculture and urbanization have led to the excessive input of nitrogen (N) into aquatic systems, while the high concentrations of inorganic C in the karst water might affect the N cycle. This paper summarized the characteristics of water in karst regions and discussed the N transformation coupled with the C cycle in the condition of high Ca2+ content, high pH, and high C/N ratios. Carbonates can consume more atmospheric and pedologic CO2 than non-carbonates because of their high solubility and high rate of dissolution, resulting in the higher average CO2 sink in karst basins worldwide than that in non-karst basins. Therefore, carbonate mineral weathering and aquatic photosynthesis are the two dominant ways of CO2 absorption, which are termed as coupled carbonate weathering. As the alkalinity and high C/N content of karst water inhibit the denitrification and mineralization processes, the karst aquatic environment is also served as the N sink.
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来源期刊
Blue-Green Systems
Blue-Green Systems Multiple-
CiteScore
8.70
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