Water use efficiency of China's karst ecosystems: The effect of different ecohydrological and climatic factors
文献类型：期刊论文
| 作者 | Zhou, Xu; Ao, Yang; Jiang, Xiao3; Yang, Shengtian2; Hu, Yuxue; Wang, Xiaohua1; Zhang, Ji4 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-12-20 |
| 卷号 | 905页码:167069 |
| 关键词 | Water use efficiency Ecohydrological factors Different climatic conditions Path analysis Elasticity coefficient analysis Karst ecosystem |
| DOI | 10.1016/j.scitotenv.2023.167069 |
| 文献子类 | Article |
| 英文摘要 | Water use efficiency (WUE) is an important indicator for understanding the coupled ecosystem carbon and water cycles. However, the effect and contributions of factors on WUE variations in China's karst ecosystems for different climatic conditions have not been extensively studied. Our studies on WUE variations of China's karst ecosystems from 2001 to 2021 based on evapotranspiration and net primary productivity (NPP) from Moderateresolution imaging spectroradiometer revealed the contributions of soil moisture (SM), leaf area index (LAI), precipitation (P), temperature (T), vapor pressure deficit (VPD), and CO2 concentration (CO2). Results showed that the trend of WUE was similar to that of NPP in terms of the latitude, longitude, and elevation, and WUE started abruptly decreasing after an elevation >3000 m until it reached 0 at 4500 m. WUE was primarily slightly increased in the humid region (H) and slightly decreased in the semi-humid region (SH), arid and semi-arid regions (ASA), and Qinghai-Tibet plateau region (QTP). CO2 (0.34), LAI (0.60), P (0.58), and LAI (0.55) exhibited the strongest positive direct effects on WUE in H, SH, ASA, and QTP, while VPD exhibited the strongest negative direct effect. VPD (0.26), VPD (0.28), SM (0.47), and P (0.39) had the strongest positive indirect effect, while T (-0.24), T (-0.18), VPD (-0.35), and P (-0.03) had the strongest negative indirect effect on WUE. The positive contributions of WUE variations in H, SH, ASA, and QTP were dominated by T (47.96 %), CO2 (26.36 %), P (8.81 %), and CO2 (52.97 %), whereas the negative contributions were dominated by P (-7.95 %), LAI (-26.57 %), CO2 (-35.98 %), and VPD (-9.59 %), respectively. This study quantifies the spatial and temporal distribution patterns of WUE in China's karst ecosystems and the regional differences between the multiple ecohydrological factors, thereby facilitating in-depth understanding and effective regulation for the carbon and water cycles in karst ecosystems. |
| WOS关键词 | NET PRIMARY PRODUCTION ; TERRESTRIAL ECOSYSTEMS ; VEGETATION ; REGION ; DRIVERS ; IMPACT ; AREA ; LEAF |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS记录号 | WOS:001083900900001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/200914]  |
| 专题 | 资源与环境信息系统国家重点实验室_外文论文 |
| 作者单位 | 1.Beijing Normal Univ, Coll Water Sci, Beijing 100875, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 3.Guizhou Normal Univ, Sch Geog & Environm Sci, Guiyang 550025, Peoples R China 4.PIESAT Informat Technol Co Ltd, Beijing 100195, Peoples R China 5.Chongqing Inst Meteorol Sci, Chongqing 401147, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Xu,Ao, Yang,Jiang, Xiao,et al. Water use efficiency of China's karst ecosystems: The effect of different ecohydrological and climatic factors[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,905:167069. |
| APA | Zhou, Xu.,Ao, Yang.,Jiang, Xiao.,Yang, Shengtian.,Hu, Yuxue.,...&Zhang, Ji.(2023).Water use efficiency of China's karst ecosystems: The effect of different ecohydrological and climatic factors.SCIENCE OF THE TOTAL ENVIRONMENT,905,167069. |
| MLA | Zhou, Xu,et al."Water use efficiency of China's karst ecosystems: The effect of different ecohydrological and climatic factors".SCIENCE OF THE TOTAL ENVIRONMENT 905(2023):167069. |
入库方式： OAI收割
来源：地理科学与资源研究所
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