收稿日期: 2018-11-22
修回日期: 2019-02-27
网络出版日期: 2019-07-04
基金资助
国家自然科学基金重点项目“南方红壤丘陵关键带碳及其同位素的关键生物地球化学过程与控制机制”(编号：41830860);国家自然科学基金国际(地区)合作与交流项目“喀斯特关键带岩石—土壤—生物—大气连续体的碳过程及其控制机制”(编号：41571130043)
Understanding the Biogeochemical Process and Mechanism of Ecosystem Carbon Cycle from the Perspective of the Earth's Critical Zone
Received date: 2018-11-22
Revised date: 2019-02-27
Online 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)
陆地生态系统研究通常未考虑影响整个岩石风化层——土壤剖面的生物地球化学过程，而关键带科学则强调从冠层到基岩重新认识整个生态系统的结构和功能，在流域尺度上应该强调大气和植物之间、植物和土壤之间、小流域土壤和溪流之间物质和元素循环的相互联系等。植物碳固定及分配、从地表到基岩的土壤碳库分解和转化以及小流域碳迁移与平衡是碳生物地球化学循环的起始、周转和迁移过程的关键环节，应该加强流域尺度上从冠层到基岩的生态系统碳循环过程、机制及其生态功能研究。同位素技术具有指示、示踪和整合功能，通过δ13C自然示踪和人工标记技术，可以辅助解析碳生物地球化学过程与机制。
温学发 , 张心昱 , 魏杰 , 吕斯丹 , 王静 , 陈昌华 , 宋贤威 , 王晶苑 , 戴晓琴 . 地球关键带视角理解生态系统碳生物地球化学过程与机制[J]. 地球科学进展, 2019 , 34(5) : 471 -479 . DOI: 10.11867/j.issn.1001-8166.2019.05.0471
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.
Key words： Critical Zone; Ecosystem; Biogeochemistry; Carbon cycle; Carbon isotope.
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