Critical thresholds for nonlinear responses of ecosystem water use efficiency to drought
文献类型：期刊论文
| 作者 | Hu, Ying1; Wei, Fangli2; Wang, Shuai3; Zhang, Wenmin4; Fensholt, Rasmus4; Xiao, Xiangming5; Fu, Bojie1 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2024-03-25 |
| 卷号 | 918页码:10 |
| ISSN号 | 0048-9697 |
| 关键词 | Drought Water use efficiency Response trajectory Critical thresholds Ecological risks |
| DOI | 10.1016/j.scitotenv.2024.170713 |
| 通讯作者 | Fu, Bojie(bfu@rcees.ac.cn) |
| 英文摘要 | Climate change is expected to lead to greater variability in precipitation and drought in different regions. However, the responses of ecosystem carbon and water cycles (i.e., water use efficiency, WUE) to different levels of drought stress are not fully understood. Here, we examined the relationship between WUE and precipitation anomalies and identified the critical drought threshold (Dr(CW)) above which WUE showed substantial decrease. The results revealed that 85.56 % of the study area had nonlinear WUE responses to drought stress; that is, the WUE decreased sustainably and steeply when the precipitation deficit exceeded the Dr(CW). Dr(CW) indicates inflection points for changing ecosystem responses from relatively resistant to vulnerable to drought stress, thus providing an instructive early warning for intensifying suppressive impacts on vegetation growth. Additionally, Dr(CW) varies across aridity gradients and among vegetation types. Based on the Dr(CW) at the pixel level, the future eco-drought is projected to increase in >67 % of the study area under both the SSP2&RCP4.5 and SSP5&RCP8.5 scenarios by the end of the 21st century. Our study elucidates the response of the ecosystem function to drought and supports the development of accurate ecosystem adaptation policies for future drought stress. |
| WOS关键词 | GROSS PRIMARY PRODUCTION |
| 资助项目 | National Natural Science Foundation of China[42041007] ; Bureau of International Cooperation, Chinese Academy of Sciences (Joint CAS-MPG Research Project)[HZXM20225001MI] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001184971300001 |
| 资助机构 | National Natural Science Foundation of China ; Bureau of International Cooperation, Chinese Academy of Sciences (Joint CAS-MPG Research Project) |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/203876]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Fu, Bojie |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 3.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 4.Univ Copenhagen, Dept Geosci & Nat Resource Management, Copenhagen, Denmark 5.Univ Oklahoma, Ctr Earth Observat & Modeling, Dept Microbiol & Plant Biol, Norman, OK USA |
| 推荐引用方式 GB/T 7714 | Hu, Ying,Wei, Fangli,Wang, Shuai,et al. Critical thresholds for nonlinear responses of ecosystem water use efficiency to drought[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,918:10. |
| APA | Hu, Ying.,Wei, Fangli.,Wang, Shuai.,Zhang, Wenmin.,Fensholt, Rasmus.,...&Fu, Bojie.(2024).Critical thresholds for nonlinear responses of ecosystem water use efficiency to drought.SCIENCE OF THE TOTAL ENVIRONMENT,918,10. |
| MLA | Hu, Ying,et al."Critical thresholds for nonlinear responses of ecosystem water use efficiency to drought".SCIENCE OF THE TOTAL ENVIRONMENT 918(2024):10. |
入库方式： OAI收割
来源：地理科学与资源研究所
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