Quantifying Time-Lag and Time-Accumulation Effects of Climate Change and Human Activities on Vegetation Dynamics in the Yarlung Zangbo River Basin of the Tibetan Plateau
文献类型：期刊论文
| 作者 | Li, Ning1; Wang, Di2 |
| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2025 |
| 卷号 | 17期号:1页码:160 |
| 关键词 | vegetation dynamics leaf area index time-lag effect time-accumulation effect climate change human activities the Yarlung Zangbo river |
| DOI | 10.3390/rs17010160 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Vegetation, as a fundamental component of terrestrial ecosystems, plays a pivotal role in the flux of water, heat, and nutrients between the lithosphere, biosphere, and atmosphere. Assessing the impacts of climate change and human activities on vegetation dynamics is essential for maintaining the health and stability of fragile ecosystems, such as the Yarlung Zangbo River (YZR) basin of the Tibetan Plateau, the highest-elevation river basin in the world. Vegetation responses to climate change are inherently asymmetric, characterized by distinct temporal effects. However, these temporal effects remain poorly understood, particularly in high-altitude ecosystems. Here, we examine the spatiotemporal changes in leaf area index (LAI) and four climatic factors-air temperature, precipitation, potential evapotranspiration, and solar radiation-in the YZR basin over the period 2000-2019. We further explore the time-lag and time-accumulation impacts of these climatic factors on LAI dynamics and apply an enhanced residual trend analysis to disentangle the relative contributions of climate change and human activities. Results indicated that (1) a modest increase in annual LAI at a rate of 0.02 m(2) m(-2) dec(-1) was detected across the YZR basin. Spatially, LAI increased in 66% of vegetated areas, with significant increases (p < 0.05) in 10% of the basin. (2) Temperature, precipitation, and potential evapotranspiration exhibited minimal time-lag (<0.5 months) but pronounced notable time-accumulation effects on LAI variations, with accumulation periods ranging from 1 to 2 months. In contrast, solar radiation demonstrated significant time-lag impacts, with an average lag period of 2.4 months, while its accumulation effects were relatively weaker. (3) Climate change and human activities contributed 0.023 +/- 0.092 and -0.005 +/- 0.109 m(2) m(-2) dec(-1) to LAI changes, respectively, accounting for 60% and 40% on the observed variability. Spatially, climate change accounted for 85% of the changes in LAI in the upper YZR basin, while vegetation dynamics in the lower basin was primarily driven by human activities, contributing 63%. In the middle basin, vegetation dynamics were influenced by the combined effects of climate change and human activities. Our findings deepen insights into the drivers of vegetation dynamics and provide critical guidance for formulating adaptive management strategies in alpine ecosystems. |
| URL标识 | 查看原文 |
| WOS关键词 | POTENTIAL EVAPOTRANSPIRATION ; RESPONSES ; CHINA ; RESTORATION ; GROWTH ; SOIL ; TEMPERATURE ; MECHANISMS ; FEEDBACKS ; IMPACTS |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:001396323000001 |
| 出版者 | MDPI |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/211366]  |
| 专题 | 资源利用与环境修复重点实验室_外文论文 |
| 通讯作者 | Wang, Di |
| 作者单位 | 1.Chinese Acad Sci, Aerosp Informat Res Inst, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China; 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Ning,Wang, Di. Quantifying Time-Lag and Time-Accumulation Effects of Climate Change and Human Activities on Vegetation Dynamics in the Yarlung Zangbo River Basin of the Tibetan Plateau[J]. REMOTE SENSING,2025,17(1):160. |
| APA | Li, Ning,&Wang, Di.(2025).Quantifying Time-Lag and Time-Accumulation Effects of Climate Change and Human Activities on Vegetation Dynamics in the Yarlung Zangbo River Basin of the Tibetan Plateau.REMOTE SENSING,17(1),160. |
| MLA | Li, Ning,et al."Quantifying Time-Lag and Time-Accumulation Effects of Climate Change and Human Activities on Vegetation Dynamics in the Yarlung Zangbo River Basin of the Tibetan Plateau".REMOTE SENSING 17.1(2025):160. |
入库方式： OAI收割
来源：地理科学与资源研究所
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