Characterization of water use efficiency changes in Tibetan Plateau grasslands based on eco-geographic zoning
文献类型：期刊论文
| 作者 | Wang, Licheng |
| 刊名 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
 |
| 出版日期 | 2022-11-14 |
| 页码 | 15 |
| 关键词 | Tibetan Plateau WUE Eco-geographic regions |
| ISSN号 | 0944-1344 |
| DOI | 10.1007/s11356-022-23939-0 |
| 通讯作者 | Wang, Licheng(1203112026@qq.com) |
| 英文摘要 | Water use efficiency (WUE) is an effective indicator to study the coupling of terrestrial carbon and water cycles. The Tibetan Plateau (TP) is the most important ecological security barrier in China, and it is important to understand the characteristics of WUE and the change mechanism to study the carbon and water cycles of plateau ecosystems and the rational use of water resources. This study analyzes the spatial and temporal characteristics of WUE on the TP and the influence of climate factors on WUE based on the gross primary productivity (GPP) and evapotranspiration (ET) data from GLASS. The results show that from 1985 to 2018, the WUE of the TP is on the rise under the combined effect of GPP and ET; the regions with higher mean WUE values are the southeastern and eastern parts of the plateau, and the low value areas are the central and northwestern parts of the plateau. Compared with precipitation, WUE is influenced by temperature over a larger area. The correlations between precipitation and temperature and WUE in different eco-geographic regions are complex, and there is a threshold effect on the correlation between WUE and temperature and precipitation. Temperature is the main driver of WUE changes in HIIA and HIB1 regions, while precipitation has a greater impact on WUE changes in HIIC2, HIIC2, HIC2, HIID3, and HIIC regions. Precipitation, temperature, and elevation are the main factors explaining the variation of WUE in the TP. According to the risk detector, it can be determined that grassland vegetation in warm and humid steep areas of low and medium elevations is more able to maintain efficient use of water. Meanwhile, grasslands located in the shade of northern slopes have weaker transpiration, which is conducive to vegetation accumulation of growth water, and thus can ensure higher WUE. The related study can provide a reference for the response of vegetation WUE to global changes in key climatic regions. |
| WOS关键词 | CARBON-DIOXIDE ; LOESS PLATEAU ; VAPOR EXCHANGE ; PRECIPITATION ; ECOSYSTEM ; VEGETATION ; CO2 ; RESPONSES ; FOREST ; REVEGETATION |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000882750700002 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/187208]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wang, Licheng |
| 作者单位 | Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Licheng. Characterization of water use efficiency changes in Tibetan Plateau grasslands based on eco-geographic zoning[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2022:15. |
| APA | Wang, Licheng.(2022).Characterization of water use efficiency changes in Tibetan Plateau grasslands based on eco-geographic zoning.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,15. |
| MLA | Wang, Licheng."Characterization of water use efficiency changes in Tibetan Plateau grasslands based on eco-geographic zoning".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2022):15. |
入库方式： OAI收割
来源：地理科学与资源研究所
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