globalchange  > 气候减缓与适应
DOI: 10.1111/ele.13078
Scopus记录号: 2-s2.0-85046398149
论文题名:
Climatic role of terrestrial ecosystem under elevated CO2: a bottom-up greenhouse gases budget
作者: Liu S.; Ji C.; Wang C.; Chen J.; Jin Y.; Zou Z.; Li S.; Niu S.; Zou J.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2018
卷: 21, 期:7
起始页码: 1108
结束页码: 1118
语种: 英语
英文关键词: Climate change ; elevated CO2 ; greenhouse gas ; meta-analysis ; plant C pool ; soil C and N cycle
英文摘要: The net balance of greenhouse gas (GHG) exchanges between terrestrial ecosystems and the atmosphere under elevated atmospheric carbon dioxide (CO2) remains poorly understood. Here, we synthesise 1655 measurements from 169 published studies to assess GHGs budget of terrestrial ecosystems under elevated CO2. We show that elevated CO2 significantly stimulates plant C pool (NPP) by 20%, soil CO2 fluxes by 24%, and methane (CH4) fluxes by 34% from rice paddies and by 12% from natural wetlands, while it slightly decreases CH4 uptake of upland soils by 3.8%. Elevated CO2 causes insignificant increases in soil nitrous oxide (N2O) fluxes (4.6%), soil organic C (4.3%) and N (3.6%) pools. The elevated CO2-induced increase in GHG emissions may decline with CO2 enrichment levels. An elevated CO2-induced rise in soil CH4 and N2O emissions (2.76 Pg CO2-equivalent year−1) could negate soil C enrichment (2.42 Pg CO2 year−1) or reduce mitigation potential of terrestrial net ecosystem production by as much as 69% (NEP, 3.99 Pg CO2 year−1) under elevated CO2. Our analysis highlights that the capacity of terrestrial ecosystems to act as a sink to slow climate warming under elevated CO2 might have been largely offset by its induced increases in soil GHGs source strength. © 2018 John Wiley & Sons Ltd/CNRS
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107433
Appears in Collections:气候减缓与适应

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作者单位: Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, China; Jiangsu Key Lab and Engineering Center for Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, China; College of Overseas Education, Nanjing Tech University, Nanjing, China; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Liu S.,Ji C.,Wang C.,et al. Climatic role of terrestrial ecosystem under elevated CO2: a bottom-up greenhouse gases budget[J]. Ecology Letters,2018-01-01,21(7)
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