Effects of Rainfall Manipulation on Ecosystem Respiration and Soil Respiration in an Alpine Steppe in Northern Tibet Plateau
文献类型：期刊论文
| 作者 | Li, Xueqin1,2; Yan, Yan2 ; Fu, Lijiao1,2
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| 刊名 | FRONTIERS IN ECOLOGY AND EVOLUTION
 |
| 出版日期 | 2021-10-15 |
| 卷号 | 9页码:16 |
| 关键词 | ecosystem respiration soil respiration precipitation change soil moisture aboveground biomass |
| ISSN号 | 2296-701X |
| DOI | 10.3389/fevo.2021.708761 |
| 英文摘要 | The response mechanism of ecosystem respiration (Re) and soil respiration (Rs) to different water conditions is of great significance for understanding the carbon cycle under future changes in the precipitation patterns. We used seven precipitation treatments to investigate the effects of precipitation on Re and Rs on a typical alpine steppe in Northern Tibet. Precipitation was captured and relocated to simulate the precipitation rates of -25, -50, -75, 0 (CK), +25, +50, and +75%. The soil moisture was influenced by all the precipitation treatments. There was a positive linear relationship between the soil moisture and Re, Rs in the study area during the experiment (July-October). Soil volumetric water content (VWC), absolute water content (AWC), soil temperature (ST), aboveground biomass (AGB), bulk density, soil total nitrogen (TN), and alkaline hydrolysis nitrogen (AHN) were the predictors of Re and Rs. The multiple linear regression analysis showed that ST and AWC could explain 90.6% of Rs, and ST, AWC, and AHN could explain 89.4% of Re. Ecosystem respiration was more sensitive to the increased precipitation (+29.5%) whereas Rs was more sensitive to the decreased precipitation (-23.8%). An appropriate increase in water (+25 and +50%) could improve the Re and Rs, but a greater increase (+75%) would not have a significant effect; it could have an effect even lower than those of the first two. Our study highlights the importance of increased precipitation and the disadvantage of decreased precipitation on Re and Rs in an arid region. The precipitation changes will lead to significant changes in the soil properties and AGB, and affect Re and Rs, to change the climate of the alpine steppe in Northern Tibet in the future. These findings contribute to our understanding of the regional patterns of environmental C exchange and soil C flux under the climate change scenarios and highlight the importance of water availability to the regulating ecosystem processes in semi-arid steppe ecosystems. In view of these findings, we urge future researchers to focus on manipulating the precipitation over longer time scales, seasonality, and incorporating more environmental factors to improve our ability to predict and model Re and Rs and feedback from climate change. |
| WOS关键词 | EXPERIMENTAL DROUGHT ; CARBON STORAGE ; DIFFERENTIAL RESPONSES ; SEMIARID GRASSLANDS ; CLIMATE-CHANGE ; CO2 EFFLUX ; PRECIPITATION ; PLANT ; WATER ; TEMPERATURE |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000714849200001 |
| 出版者 | FRONTIERS MEDIA SA |
| 源URL | [http://ir.imde.ac.cn/handle/131551/56143]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 通讯作者 | Yan, Yan |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xueqin,Yan, Yan,Fu, Lijiao. Effects of Rainfall Manipulation on Ecosystem Respiration and Soil Respiration in an Alpine Steppe in Northern Tibet Plateau[J]. FRONTIERS IN ECOLOGY AND EVOLUTION,2021,9:16. |
| APA | Li, Xueqin,Yan, Yan,&Fu, Lijiao.(2021).Effects of Rainfall Manipulation on Ecosystem Respiration and Soil Respiration in an Alpine Steppe in Northern Tibet Plateau.FRONTIERS IN ECOLOGY AND EVOLUTION,9,16. |
| MLA | Li, Xueqin,et al."Effects of Rainfall Manipulation on Ecosystem Respiration and Soil Respiration in an Alpine Steppe in Northern Tibet Plateau".FRONTIERS IN ECOLOGY AND EVOLUTION 9(2021):16. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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