Advances in Earth Science ›› 2019, Vol. 34 ›› Issue (5): 471-479. doi: 10.11867/j.issn.1001-8166.2019.05.0471

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Understanding the Biogeochemical Process and Mechanism of Ecosystem Carbon Cycle from the Perspective of the Earth's Critical Zone

Xuefa Wen 1, 2( ),Xinyu Zhang 1, 2,Jie Wei 1,Sidan Lü 1,Jing Wang 1,Changhua Chen 1,Xianwei Song 1,Jingyuan Wang 1,Xiaoqin Dai 1   

  1. 1. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
    2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
  • Received:2018-11-22 Revised:2019-02-27 Online:2019-05-10 Published:2019-07-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China “Biogeochemical process and control mechanism of carbon and its isotopes in the critical zone of red soil hills in Southern China” (No. 41830860) and “Soil carbon processes and their underlying mechanism in the vertical dimension of Karst critical zone of Southwest China”(No. 41571130043)

Xuefa Wen,Xinyu Zhang,Jie Wei,Sidan Lü,Jing Wang,Changhua Chen,Xianwei Song,Jingyuan Wang,Xiaoqin Dai. Understanding the Biogeochemical Process and Mechanism of Ecosystem Carbon Cycle from the Perspective of the Earth's Critical Zone[J]. Advances in Earth Science, 2019, 34(5): 471-479.

Previous research rarely considers the biogeochemistry process of the whole rock weathering layer-soil profile. The aim of Critical Zone science is re-understanding the structure and function of ecosystems from the canopy to bedrock, which emphasizes the relationship of material and energy between atmosphere and plant, between plant and soil, between soil and river in small watershed on the watershed scale. Carbon fixation and allocation are the key starting processes. Decomposition and transformation of soil carbon are the key turnover processes. Carbon migration and balance in small watershed are the key transfer processes. Further research is needed in the process, mechanism and ecology function of ecosystem carbon cycle from the canopy to bedrock based on the watershed scale. Carbon isotope technology has the function of indication, tracing and integration. Based on the 13C natural tracing and artificial labelling methods, we can further understand the process and mechnism of carbon biogeochemistry.

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