Median to Strong Rainfall Intensity Favors Carbon Sink in a Temperate Grassland Ecosystem in China
文献类型：期刊论文
| 作者 | Hao, Guangcun2; Hu, Zhongmin2,3 ; Guo, Qun1,4; Di, Kai2; Li, Shenggong1,4
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| 刊名 | SUSTAINABILITY
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| 出版日期 | 2019-11-01 |
| 卷号 | 11期号:22页码:13 |
| 关键词 | climate change rainfall pattern grassland ecosystem carbon exchange |
| DOI | 10.3390/su11226376 |
| 通讯作者 | Hu, Zhongmin(huzm@m.scnu.edu.cn) |
| 英文摘要 | Over the past 50 years, rainfall events have made significant alterations to environments due to global warming. The grasslands in arid and semi-arid regions are extremely sensitive to variations in rainfall patterns, which are considered to significantly affect ecosystem functions. In this study, an experiment with varying rainfall sizes and frequencies (0 mm, 2 mm, 5 mm, 10 mm, 20 mm, and 40 mm) was conducted during growing seasons in typical grasslands, to study the effect of changes in rainfall regime on net ecosystem exchange (NEE). Our results indicated that NEE exhibited nonlinear responses to rainfall treatments, and reached its peak under 20 mm in middle growing season. Further, the component fluxes of both NEE (i.e., gross primary productivity (GPP)) and ecosystem respiration (ER) illustrated nonlinear responses to treatment gradient, with peak values at 20 mm and 5 mm, respectively. Based on five-year eddy flux measurements, further analyses demonstrated that GPP and ER increased with increasing soil moisture, and net ecosystem carbon uptake (-1*NEE) was significantly stimulated due to a more enhanced GPP than ER, when soil moisture was above 8%. Additionally, we found that the response of root biomass was different from that of carbon fluxes to changes in rainfall patterns. Overall, these findings highlight the importance of both changes in rainfall regimes in controlling ecosystem C exchange and investigation of the potential threshold for ecosystem function shifts, which are crucial to further understand C cycles in grasslands. |
| WOS关键词 | SOIL RESPIRATION ; PRECIPITATION PULSE ; INNER-MONGOLIA ; EXCHANGE ; NITROGEN ; RESPONSES ; WATER ; VARIABILITY ; PRODUCTIVITY ; RESILIENCE |
| 资助项目 | National Key R&D Program of China[2016YFC0501603] ; National Key R&D Program of China[2017YFA060481] ; National Natural Science Foundation of China[31922053] ; National Natural Science Foundation of China[31570437] ; Startup Foundation for Talented Scholars in South China Normal University[S82360] |
| WOS研究方向 | Science & Technology - Other Topics ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000503277900189 |
| 出版者 | MDPI |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; Startup Foundation for Talented Scholars in South China Normal University |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/131097]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Hu, Zhongmin |
| 作者单位 | 1.Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.South China Normal Univ, Sch Geog, Guangzhou 510631, Guangdong, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab, Zhuhai 519082, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hao, Guangcun,Hu, Zhongmin,Guo, Qun,et al. Median to Strong Rainfall Intensity Favors Carbon Sink in a Temperate Grassland Ecosystem in China[J]. SUSTAINABILITY,2019,11(22):13. |
| APA | Hao, Guangcun,Hu, Zhongmin,Guo, Qun,Di, Kai,&Li, Shenggong.(2019).Median to Strong Rainfall Intensity Favors Carbon Sink in a Temperate Grassland Ecosystem in China.SUSTAINABILITY,11(22),13. |
| MLA | Hao, Guangcun,et al."Median to Strong Rainfall Intensity Favors Carbon Sink in a Temperate Grassland Ecosystem in China".SUSTAINABILITY 11.22(2019):13. |
入库方式： OAI收割
来源：地理科学与资源研究所
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