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Importance of Considered Organic Versus Inorganic Source of Carbon to Lakes for Calculating Net Effect on Landscape C Budgets
Weiqi Lu;  shilu Wang;  kevin M. Yeager;  Fang Liu;  Qiangsheng Huang;  Yuxue Yang;  Peng Xiang;  Yingchun Lü;  Cong-qiang Liu
2018
发表期刊Journal of Geophysical Research Biogeosciences
卷号123期号:4页码:1302-1317
摘要

Lakes and reservoirs transform, emit, and bury carbon that is exported from land and are thus significant components of terrestrial carbon budgets. Their significance is often assessed by integrating these water bodies into terrestrial primary production. However, the transfer of inorganic carbon (IC) is likely a sticking point for these integrations because IC is not part of net ecosystem production. Here we integrated carbon evasion and organic carbon (OC) burial in a lake in the context of inorganic and OC cycling in a karst catchment from a system perspective. The lake emitted carbon dioxide (CO2) and buried OC at rates of 1.0 +/- 0.2 and 0.9 +/- 0.2 g Cm-2 a(-1), respectively, approximately equaling 13% and 11% of catchment net ecosystem production, respectively. These proportions represent significant influences on terrestrial carbon budgets, given an organic origin. However, catchment carbon export is dominated by IC that is derived from carbonates dissolved by soil CO2. Lake CO2 evasion accounts for less than 0.1% of soil CO2 efflux, suggesting little potential in significantly altering terrestrial carbon budgets. This comparison indicates the significance of aquatic CO2 evasion, requiring an adjustment of terrestrial carbon budgets to recognize their dependence on carbon origins. The significance may be overstated if inorganic origin is ignored. Our study suggests that a careful reassessment of the significance of CO2 evasion and OC burial in freshwater ecosystems to local and global carbon budgets, with full consideration of their sources, is necessary and pressing.

收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.gyig.ac.cn/handle/42920512-1/8753
专题环境地球化学国家重点实验室
作者单位1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang,China
2.University of Chinese Academy of Sciences, Beijing, China
3.Department of Earth and Environmental Sciences,University of Kentucky, Lexington, KY, USA
4.Now at Baise University, Baise, China
5.Now at Yantai Institute of Coastal ZoneResearch, Chinese Academy of Sciences, Yaitai, China
推荐引用方式
GB/T 7714
Weiqi Lu;shilu Wang;kevin M. Yeager;Fang Liu;Qiangsheng Huang;Yuxue Yang;Peng Xiang;Yingchun Lü;Cong-qiang Liu. Importance of Considered Organic Versus Inorganic Source of Carbon to Lakes for Calculating Net Effect on Landscape C Budgets[J]. Journal of Geophysical Research Biogeosciences,2018,123(4):1302-1317.
APA Weiqi Lu;shilu Wang;kevin M. Yeager;Fang Liu;Qiangsheng Huang;Yuxue Yang;Peng Xiang;Yingchun Lü;Cong-qiang Liu.(2018).Importance of Considered Organic Versus Inorganic Source of Carbon to Lakes for Calculating Net Effect on Landscape C Budgets.Journal of Geophysical Research Biogeosciences,123(4),1302-1317.
MLA Weiqi Lu;shilu Wang;kevin M. Yeager;Fang Liu;Qiangsheng Huang;Yuxue Yang;Peng Xiang;Yingchun Lü;Cong-qiang Liu."Importance of Considered Organic Versus Inorganic Source of Carbon to Lakes for Calculating Net Effect on Landscape C Budgets".Journal of Geophysical Research Biogeosciences 123.4(2018):1302-1317.
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