Spatiotemporal patterns and driving mechanisms of critical soil moisture thresholds in Chinese ecosystems
文献类型：期刊论文
| 作者 | Lan, Lihua1,2; Wang, Zhenbo1,2; Sun, Siao1,2; He, Fei1,2 |
| 刊名 | ECOLOGICAL INDICATORS
 |
| 出版日期 | 2025-11-01 |
| 卷号 | 180页码:114368 |
| 关键词 | Ecosystem responses Spatiotemporal variations Climatic zones Land-use types Critical soil moisture thresholds (Bcrit |
| ISSN号 | 1470-160X |
| DOI | 10.1016/j.ecolind.2025.114368 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Global climate change is profoundly reshaping the hydrological cycles of ecosystems worldwide, heightening the need to understand how these systems respond to shifts in ecohydrological processes. A key indicator in this regard is the critical soil moisture threshold (Bcrit), which marks the transition from unstressed plant water use to moisture-limited conditions. This study provides a systematic analysis of the spatiotemporal patterns of Bcrit across diverse ecosystems in China from 1980 to 2020. Our findings reveal a general decline in Bcrit across most ecosystem types over this period. Notably, however, in northwest China and the Qinghai-Tibetan Plateau, Bcrit exhibited an increasing trend, contrasting with declines observed in other climate zones. At the land-use level, Bcrit decreased in most classifications, with the exception of Open Shrublands and Barren areas. The mechanistic analysis identified that vapor pressure deficit dominated the Bcrit variations in arid and semi-arid zones, while precipitation was the primary factor in more humid regions. In the Qinghai-Tibetan Plateau, solar radiation had a primary negative impact on Bcrit. In the subtropical or tropical humid south of China, the water deficit index was the main negative driver. A comparative analysis reveals a marked shift in the influences of key climatic drivers on the Bcritbetween the two periods (1980-2000 and 2001-2020). The positive effect of precipitation was enhanced, while the inhibitory effect of vapor pressure deficit was reduced. Concurrently, the sensitivity of Bcrit to both water deficit and actual evapotranspiration declined across most regions, suggesting a weakening influence of these factors. Moreover, the negative effect of maximum temperature intensified notably in northern and northwestern China, likely due to enhanced soil moisture depletion and increased atmospheric evaporative demand under warmer conditions. This study provided a theoretical framework for assessing ecosystem adaptability and informing water resource management. |
| URL标识 | 查看原文 |
| WOS关键词 | LAND-ATMOSPHERE INTERACTIONS ; SURFACE-ENERGY-BALANCE ; COUPLING EXPERIMENT ; VEGETATION SYSTEM ; DEEP ROOTS ; CLIMATE ; WATER ; DROUGHT ; TEMPERATURES ; VARIABILITY |
| WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001616145200007 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/219497]  |
| 专题 | 区域可持续发展分析与模拟院重点实验室_外文论文 |
| 通讯作者 | Wang, Zhenbo |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lan, Lihua,Wang, Zhenbo,Sun, Siao,et al. Spatiotemporal patterns and driving mechanisms of critical soil moisture thresholds in Chinese ecosystems[J]. ECOLOGICAL INDICATORS,2025,180:114368. |
| APA | Lan, Lihua,Wang, Zhenbo,Sun, Siao,&He, Fei.(2025).Spatiotemporal patterns and driving mechanisms of critical soil moisture thresholds in Chinese ecosystems.ECOLOGICAL INDICATORS,180,114368. |
| MLA | Lan, Lihua,et al."Spatiotemporal patterns and driving mechanisms of critical soil moisture thresholds in Chinese ecosystems".ECOLOGICAL INDICATORS 180(2025):114368. |
入库方式： OAI收割
来源：地理科学与资源研究所
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