Differential responses of ecosystem carbon flux components to experimental precipitation gradient in an alpine meadow
文献类型：期刊论文
| 作者 | Zhang, Fangyue1,2; Quan, Quan1,2; Ma, Fangfang1,2; Tian, Dashuan1; Zhou, Qingping3; Niu, Shuli1,2 |
| 刊名 | FUNCTIONAL ECOLOGY
 |
| 出版日期 | 2019-05-01 |
| 卷号 | 33期号:5页码:889-900 |
| 关键词 | alpine meadow carbon fluxes climate extremes manipulative experiment nonlinear response precipitation gradient |
| ISSN号 | 0269-8463 |
| DOI | 10.1111/1365-2435.13300 |
| 通讯作者 | Niu, Shuli(sniu@igsnrr.ac.cn) |
| 英文摘要 | Changes in precipitation have the potential to cause dramatic changes in ecosystem carbon (C) cycling; however, it remains unclear whether different components of the net ecosystem exchange (NEE) (e.g., C uptake vs. release, plant vs. microbe respiration, above-ground vs. below-ground plant respiration) have similar or differential sensitivity to precipitation gradients. We conducted a manipulative field experiment (from 2015 to 2017) with six precipitation treatments, including 1/12 annual precipitation (P), 1/4 P, 1/2 P, 3/4 P, P and 5/4 P in an alpine meadow to investigate the responses of the NEE components. Over the 3years, all C fluxes showed a nonlinear response to the precipitation gradients, except for root respiration. The most extreme drought treatment (1/12 P) caused strong reductions in NEE by 15.57%, gross primary productivity by 17.26% and ecosystem respiration by 19.05%, in contrast to the control. Plant respiration was more sensitive to precipitation change than microbe respiration, and above-ground plant respiration was more susceptible than below-ground respiration. Structural equation models revealed that the response of C fluxes under precipitation changes was primarily due to changes in the soil water content and above-ground net primary productivity. Our findings indicate that future precipitation changes, particularly extreme drought, will decrease ecosystem C fluxes with different magnitudes, leading to a consequent reduction of NEE. These emergent ecosystem properties are essential for the improved elucidation of carbon cycle dynamics and benchmarking models, to predict ecosystem responses to precipitation changes. A plain language summary is available for this article. |
| WOS关键词 | NET PRIMARY PRODUCTIVITY ; PLANT-SPECIES DIVERSITY ; SOIL-MOISTURE ; CLIMATE-CHANGE ; HETEROTROPHIC RESPIRATION ; INTERANNUAL VARIABILITY ; EXPERIMENTAL DROUGHT ; WATER AVAILABILITY ; DIOXIDE EXCHANGE ; EXTREME DROUGHT |
| 资助项目 | Ministry of Science and Technology of the People's Republic of China[2016YFC0501803] ; National Natural Science Foundation of China[31470528] ; National Natural Science Foundation of China[31625006] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000471332200013 |
| 出版者 | WILEY |
| 资助机构 | Ministry of Science and Technology of the People's Republic of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/58675]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Niu, Shuli |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Southwest Minzu Univ, Inst Qinghai Tibetan Plateau, Chengdu, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Fangyue,Quan, Quan,Ma, Fangfang,et al. Differential responses of ecosystem carbon flux components to experimental precipitation gradient in an alpine meadow[J]. FUNCTIONAL ECOLOGY,2019,33(5):889-900. |
| APA | Zhang, Fangyue,Quan, Quan,Ma, Fangfang,Tian, Dashuan,Zhou, Qingping,&Niu, Shuli.(2019).Differential responses of ecosystem carbon flux components to experimental precipitation gradient in an alpine meadow.FUNCTIONAL ECOLOGY,33(5),889-900. |
| MLA | Zhang, Fangyue,et al."Differential responses of ecosystem carbon flux components to experimental precipitation gradient in an alpine meadow".FUNCTIONAL ECOLOGY 33.5(2019):889-900. |
入库方式： OAI收割
来源：地理科学与资源研究所
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