Predominance of precipitation event controls ecosystem CO2 exchange in an Inner Mongolian desert grassland, China
文献类型：期刊论文
| 作者 | Wang Yuhui6; Chen Jiquan6; Zhou Guangsheng5; Shao Changliang3,4; Chen Jun; Wang Yu2,6; Song Jianmin |
| 刊名 | JOURNAL OF CLEANER PRODUCTION
 |
| 出版日期 | 2018 |
| 卷号 | 197页码:781-793 |
| 关键词 | Extreme precipitation Ecosystem CO2 exchange Accumulative NEE Nonlinear equation Desert grassland |
| ISSN号 | 0959-6526 |
| DOI | 10.1016/j.jclepro.2018.06.107 |
| 文献子类 | Article |
| 英文摘要 | The intensity and frequency of precipitation events, especially extreme precipitation events (EPE), are increasingly recognized for their importance in regulating ecosystem functions (e.g., C fluxes). Here we assessed the effects of precipitation events on ecosystem carbon exchange following the precipitation events. Naturally occurring precipitation events and CO2 exchange were measured by applying an eddy covariance technique and meteorological tower between 2008 and 2010 in a desert grassland in Inner Mongolia, China. The results indicate that the accumulative net ecosystem exchange (NEE) of carbon was -11.08 gC.m(-2), -15.62 gC.m(-2) and 26.68 gC 110 in 2008, 2009 and 2010, respectively. The magnitude and timing of precipitation controlled the variation in accumulative NEE. Summer and autumn precipitation produced stronger impacts than those in the spring. The desert grassland appeared more sensitive to precipitation than other grassland ecosystems, with a threshold of similar to 1-2 mm precipitation. During the 3-year study period, EPEs significantly enhanced the carbon sink strength due to discrepant sensitivity of gross ecosystem productivity (GEP) and ecosystem respiration (R-eco) to precipitation events. NEE response time to EPE (T-L) lasted 5-17 days. Total accumulative carbon was - 40.32 gC m(-2), which was 91% more than the 3-year average of NEE during T-L and 33% more than the growing season average. GEP and R-eco were disproportionally promoted by 52% and 37% with EPEs during T-L. A nonlinear equation (NEE = alpha + beta te(-gamma t)) was developed with high confidence (R-2 = 0.84) to model the changes of NEE following the precipitation event. The sensitivity response of carbon exchange processes to larger precipitation events suggests that the carbon sink strength of the Inner Mongolian desert grassland will be elevated with the increase in the frequency and intensity of extreme precipitation. This study provides updated evidence regarding how precipitation events alter ecosystem carbon sequestration and helps mitigate the uncertainty when quantifying the carbon budget of a semi-arid ecosystem with a different future climate. Further studies are crucial to investigate the long-term responses of carbon exchange processes to variations in precipitation patterns and characterize the responses of biological components of the carbon balance following precipitation events. (C) 2018 Elsevier Ltd. All rights reserved. |
| 学科主题 | Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences |
| 出版地 | OXFORD |
| 电子版国际标准刊号 | 1879-1786 |
| WOS关键词 | CARBON-DIOXIDE EXCHANGE ; NET ECOSYSTEM ; SEMIARID GRASSLAND ; CLIMATE EXTREMES ; PRIMARY PRODUCTIVITY ; USE EFFICIENCY ; WATER PULSES ; RESPONSES ; FLUXES ; MANIPULATION |
| 语种 | 英语 |
| WOS记录号 | WOS:000441998400073 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41775108] ; China Scholarship CouncilChina Scholarship Council ; Special fund for Meteorological research in the public interest [GYHY201406034] ; Dynamics of Coupled Natural and Human Systems (CNH) Program of the National Science Foundation (NSF)National Science Foundation (NSF) [1313761] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/20446]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Henan Univ Sci & Technol, Coll Forestry, Luoyang 471003, Henan, Peoples R China 2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China 3.Chinese Acad Agr Sci, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China 4.Chinese Acad Meteorol Sci, Beijing, Peoples R China 5.Michigan State Univ, Dept Geog, Ctr Global Change & Earth Observat, E Lansing, MI 48824 USA 6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Yuhui,Chen Jiquan,Zhou Guangsheng,et al. Predominance of precipitation event controls ecosystem CO2 exchange in an Inner Mongolian desert grassland, China[J]. JOURNAL OF CLEANER PRODUCTION,2018,197:781-793. |
| APA | Wang Yuhui.,Chen Jiquan.,Zhou Guangsheng.,Shao Changliang.,Chen Jun.,...&Song Jianmin.(2018).Predominance of precipitation event controls ecosystem CO2 exchange in an Inner Mongolian desert grassland, China.JOURNAL OF CLEANER PRODUCTION,197,781-793. |
| MLA | Wang Yuhui,et al."Predominance of precipitation event controls ecosystem CO2 exchange in an Inner Mongolian desert grassland, China".JOURNAL OF CLEANER PRODUCTION 197(2018):781-793. |
入库方式： OAI收割
来源：植物研究所
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