Heterogeneous impacts of human activities and climate change on transformed vegetation dynamics on the Qinghai-Tibet Plateau
文献类型：期刊论文
| 作者 | Yang, Dazhi1,3; Liu, Yaqun2,3 |
| 刊名 | JOURNAL OF ENVIRONMENTAL MANAGEMENT
 |
| 出版日期 | 2025-09-01 |
| 卷号 | 392页码:126575 |
| 关键词 | Qinghai-Tibet plateau Vegetation Driving factors Transition type GNDVI Human activities |
| ISSN号 | 0301-4797 |
| DOI | 10.1016/j.jenvman.2025.126575 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | In the context of intensifying global environmental change, elucidating vegetation dynamics and their driving mechanisms is vital for sustainable ecosystem management. The Qinghai-Tibet Plateau (QTP), a region known for its sensitivity and vulnerability, exhibits a high degree of responsiveness to climate change and human activities. The region's pronounced spatiotemporal heterogeneity renders it an optimal area for investigating vegetation changes and their driving mechanisms. However, existing research predominantly emphasizes natural factors, with insufficient systematic analysis of human activities, thereby constraining a comprehensive understanding of driving mechanisms. This study utilizes MODIS NDVI data to systematically analyze GNDVI (the average NDVI during the growing season) trends and their driving mechanisms across the QTP from 2000 to 2018, integrating natural factors (temperature, precipitation, potential evapotranspiration, snow depth, elevation, slope) and human factors (roads, population, grazing intensity) from multi-scale and vegetation-type perspectives. Results reveal a significant increasing trend in GNDVI (p < 0.05) across the QTP, with pronounced improvements in the northeast and degradation in specific regions of the southwest and southeast. From 2000 to 2018, 79.19% of QTP vegetation exhibited improvement (39.52% significantly), while 14.28% experienced degradation (2.78% significantly). During the study period, the QTP climate exhibited a warming and moistening trend, which generally benefited vegetation growth. The impacts of natural and human factors on vegetation changes vary significantly across different spatial regions. Population density and grazing intensity have obvious threshold effects on vegetation dynamics: when population density exceeds 17 pop/km2, their effects on vegetation change rate approach marginal effects, while grazing intensity exceeds 250 SU/km2, resulting in a significant decrease in GNDVI change rate. Notably, grazing and tourism activities near roads and lakes negatively impacted GNDVI in the southwest and southeast, partially offsetting the positive effects of climate change and contributing to degradation. Based on these findings, the study recommends establishing a long-term investment mechanism for ecosystem protection, implementing differentiated regional management strategies, and enhancing regulatory oversight of human activities. Specifically, strict controls on grazing and tourism development in ecologically sensitive areas are necessary to mitigate their impacts on fragile ecosystems. This study constructs a framework that integrates the spatiotemporal heterogeneity of natural and human factors, overcoming the limitations of traditional methods. It advances the theoretical understanding of the driving mechanisms behind vegetation dynamics in alpine ecosystems and provides a scientific foundation for formulating differentiated ecological protection policies and sustainable management strategies. |
| URL标识 | 查看原文 |
| WOS关键词 | MANN-KENDALL ; NDVI ; CALIBRATION ; REGRESSION ; VARIABLES ; RESPONSES ; GROWTH ; TESTS ; AREA |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001540969500006 |
| 出版者 | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/215576]  |
| 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 | Liu, Yaqun |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Reg Sustainable Dev Modeling, 11A Datun Rd, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Yang, Dazhi,Liu, Yaqun. Heterogeneous impacts of human activities and climate change on transformed vegetation dynamics on the Qinghai-Tibet Plateau[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2025,392:126575. |
| APA | Yang, Dazhi,&Liu, Yaqun.(2025).Heterogeneous impacts of human activities and climate change on transformed vegetation dynamics on the Qinghai-Tibet Plateau.JOURNAL OF ENVIRONMENTAL MANAGEMENT,392,126575. |
| MLA | Yang, Dazhi,et al."Heterogeneous impacts of human activities and climate change on transformed vegetation dynamics on the Qinghai-Tibet Plateau".JOURNAL OF ENVIRONMENTAL MANAGEMENT 392(2025):126575. |
入库方式： OAI收割
来源：地理科学与资源研究所
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