| 利用氮稳定同位素记录重构古海洋氮素生物地球化学循环 |
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| 引用本文： | 洪义国,徐向荣,岳维忠.利用氮稳定同位素记录重构古海洋氮素生物地球化学循环[J].自然杂志,2014,36(6):431-436. |
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| 作者姓名： | 洪义国 徐向荣 岳维忠 |
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| 作者单位： | 1.研究员，3副研究员，中国科学院南海海洋研究所热带海洋环境国家重点实验室(LTO)，广州 510301；2研究员，中国科学院南海海洋研究所热带海洋生物资源与生态重点实验室，广州 510301 |
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| 摘 要： | 初始地球的氮素循环是由大气反应和缓慢的地质过程来控制的。在大约27亿年前，微生物代谢逐渐进化成为控制地球氮素转化的最核心驱动力，使得地球上的氮循环逐渐进化成为现在的模式。不同的微生物过程会产生不同的氮稳定同位素分馏，这种分馏的信号会储存于古生物介质中，因此通过分析古生物介质中氮的稳定同位素值，可以重构古海洋的氮素生物地球化学循环过程。
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| 关 键 词： | 氮稳定同位素 古海洋 氮循环 重构 |
Reconstruction of past nitrogen biogeochemical cycle in the ancient oceans with#br# nitrogen isotopes |
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| HONG Yi-guo,XU Xiang-rong,YUE Wei-zhong.Reconstruction of past nitrogen biogeochemical cycle in the ancient oceans with#br# nitrogen isotopes[J].Chinese Journal of Nature,2014,36(6):431-436. |
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| Authors: | HONG Yi-guo XU Xiang-rong YUE Wei-zhong |
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| Institution: | 1.Professor, 3Associate Professor, State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;2.Professor, Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| Abstract: | The earliest nitrogen cycle on the earth was controlled by both atmospheric reactions and geological processes. Approximately 2.7 billion years ago, a linked suite of microbial processes evolved to be the most crucial driving force to control the nitrogen transformation, resulting in the current modern nitrogen cycling model. There is a different isotope effect associated with different microbial metabolism and this signal of isotope fractionation is reserved in the palaeobios. Therefore, nitrogen biogeochemical cycle in ancient oceans could be reconstructed by analyzing the stable isotopic ratio of nitrogen in the palaeobios. |
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