DOI: 10.1002/2017JG004159
Scopus记录号: 2-s2.0-85046673116
论文题名: Importance of Considered Organic Versus Inorganic Source of Carbon to Lakes for Calculating Net Effect on Landscape C Budgets
作者: Lu W. ; Wang S. ; Yeager K.M. ; Liu F. ; Huang Q. ; Yang Y. ; Xiang P. ; Lü Y. ; Liu C.-Q.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期: 4 起始页码: 1302
结束页码: 1317
语种: 英语
英文关键词: CO2 evasion
; lakes and reservoirs
; landscape C budgets
; organic carbon burial
; origins of carbon
Scopus关键词: carbon budget
; carbon dioxide
; catchment
; freshwater ecosystem
; inorganic carbon
; lake
; landscape
; organic carbon
; primary production
; reservoir
; terrestrial ecosystem
英文摘要: 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 C m−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. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114217
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China; University of Chinese Academy of Sciences, Beijing, China; Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY, United States; Now at Baise University, Baise, China; Now at Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yaitai, China
Recommended Citation:
Lu W.,Wang S.,Yeager K.M.,et al. 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,2018-01-01,123(4)