An Assessment of Vegetation Changes in the Three-River Headwaters Region, China: Integrating NDVI and Its Spatial Heterogeneity
文献类型：期刊论文
| 作者 | Mou, Xuejie2; Chai, Huixia2; Duan, Cheng2; Feng, Yao1; Wang, Xiahui2 |
| 刊名 | PLANTS-BASEL
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 13期号:19页码:2814 |
| 关键词 | spatial heterogeneity driving factors random forest Three-River Headwaters Region |
| DOI | 10.3390/plants13192814 |
| 产权排序 | 2 |
| 英文摘要 | Assessing vegetation changes in alpine arid and fragile ecosystems is imperative for informed ecological restoration initiatives and adaptive ecosystem management. Previous studies primarily employed the Normalized Difference Vegetation Index (NDVI) to reveal vegetation dynamics, ignoring the spatial heterogeneity alterations caused by bare soil. In this study, we used a comprehensive analysis of NDVI and its spatial heterogeneity to examine the vegetation changes across the Three-River Headwaters Region (TRHR) over the past two decades. A random forest model was used to elucidate the underlying causes of these changes. We found that between 2000 and 2022, 9.4% of the regions exhibited significant changes in both NDVI and its spatial heterogeneity. These regions were categorized into six distinct types of vegetation change: improving conditions (62.1%), regrowing conditions (11.0%), slight degradation (16.2%), medium degradation (8.4%), severe degradation (2.0%), and desertification (0.3%). In comparison with steppe regions, meadows showed a greater proportion of improved conditions and medium degradation, whereas steppes had more instances of regrowth and slight degradation. Climate variables are the dominant factors that caused vegetation changes, with contributions to NDVI and spatial heterogeneity reaching 68.9% and 73.2%, respectively. Temperature is the primary driver of vegetation dynamics across the different types of change, with a more pronounced impact in meadows. In severely degraded steppe and meadow regions, grazing intensity emerged as the predominant driver of NDVI change, with an importance value exceeding 0.50. Notably, as degradation progressed from slight to severe, the significance of this factor correspondingly increased. Our findings can provide effective information for guiding the implementation of ecological restoration projects and the sustainable management of alpine arid ecosystems. |
| WOS关键词 | TIBETAN PLATEAU ; TERRESTRIAL ECOSYSTEMS ; DRIVING FORCES ; DESERTIFICATION ; DEGRADATION ; QINGHAI ; TEMPERATURE ; PATTERNS |
| WOS研究方向 | Plant Sciences |
| WOS记录号 | WOS:001332120600001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/208219]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Feng, Yao; Wang, Xiahui |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Chinese Acad Environm Planning, Inst Ecol Protect & Restorat Planning, Yellow River Ecol & Environm Protect Ctr, Beijing 100041, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mou, Xuejie,Chai, Huixia,Duan, Cheng,et al. An Assessment of Vegetation Changes in the Three-River Headwaters Region, China: Integrating NDVI and Its Spatial Heterogeneity[J]. PLANTS-BASEL,2024,13(19):2814. |
| APA | Mou, Xuejie,Chai, Huixia,Duan, Cheng,Feng, Yao,&Wang, Xiahui.(2024).An Assessment of Vegetation Changes in the Three-River Headwaters Region, China: Integrating NDVI and Its Spatial Heterogeneity.PLANTS-BASEL,13(19),2814. |
| MLA | Mou, Xuejie,et al."An Assessment of Vegetation Changes in the Three-River Headwaters Region, China: Integrating NDVI and Its Spatial Heterogeneity".PLANTS-BASEL 13.19(2024):2814. |
入库方式： OAI收割
来源：地理科学与资源研究所
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