Temporal and Spatial Variations in the Leaf Area Index and Its Response to Topography in the Three-River Source Region, China from 2000 to 2017
文献类型：期刊论文
| 作者 | Zhang, Wenqi1,2; Jin, Huaan1 ; Shao, Huaiyong2; Li, Ainong1; Li, Shangzhi3,4; Fan, Wenjie2
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| 刊名 | ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION
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| 出版日期 | 2021 |
| 卷号 | 10期号:1页码:Article |
| 关键词 | Three-River Source Region leaf area index vegetation changes topographic effect |
| DOI | 10.3390/ijgi10010033 |
| 产权排序 | 2 |
| 通讯作者 | Jin, Huaan(jinhuaan@imde.ac.cn) |
| 文献子类 | Article |
| 英文摘要 | The Three-River Source Region (TRSR) is an important area for the ecological security of China. Vegetation growth has been affected by the climate change, topography, and human activities in this area. However, few studies have focused on analyzing time series tendencies of vegetation change in various terrain conditions. To address this issue in the TRSR, this study explored vegetation stability, tendency, and sustainability with multiple methods (e.g., coefficient of variation, Theil-Sen median trend analysis, Mann-Kendall test, and Hurst index) based on the 2000-2017 Global LAnd Surface Satellite Leaf Area Index (GLASS LAI) product. The differentiation patterns of LAI variations and multiyear mean LAI value under different topographic factors were also investigated in combination with digital elevation model (DEM). The results showed that (1) the mean LAI value in the study area increased, with a linear tendency of 0.013 center dot 10 a(-1); (2) LAI values decreased from southeast to northwest in terms of spatial distribution and the CV indicated LAI variations were relatively stable; (3) the trend analysis revealed that the improved area of LAI accounted for 62.72% which was larger than the degraded area (37.28%), and hurst index revealed a weak anti-sustaining effect of the current tendencies; and (4) the increasing trend was found in multiyear mean LAI value as relief amplitude and slope increased, while LAI stability improved with increasing slope. They exhibited a clear regular pattern. Moreover, significant improvement in LAI generally occurred in low-altitude and flat areas. Finally, the overall improvement and sustainability of LAI improved when moving from sunny aspects to shady aspects, but the LAI stability decreased. Note that vegetation degradation was observed in some high slope areas and was further aggravated. This study is beneficial for revealing the spatial and temporal changes of LAI and their changing rules as a function of different topographic factors in the TRSR. Meanwhile, the results of this study provide theoretical support for sustainable development of this area. |
| 电子版国际标准刊号 | 2220-9964 |
| 资助项目 | National Key Research and Development Program of China[2016YFA0600103] ; National Natural Science Foundation of China[41671376] ; National Natural Science Foundation of China[42071352] ; National Natural Science Foundation of China[41801370] ; Sichuan Science and Technology Program[2019YJ0007] |
| WOS研究方向 | Physical Geography ; Remote Sensing |
| 语种 | 英语 |
| WOS记录号 | WOS:000610282200001 |
| 出版者 | MDPI |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Sichuan Science and Technology Program |
| 源URL | [http://ir.imde.ac.cn/handle/131551/55255]  |
| 专题 | 成都山地灾害与环境研究所_数字山地与遥感应用中心 |
| 通讯作者 | Jin, Huaan |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Res Ctr Digital Mt & Remote Sensing Applicat, Chengdu 610041, Peoples R China 2.Chengdu Univ Technol, Coll Earth Sci, Chengdu 610059, Peoples R China 3.Henan Polytech Univ, Sch Surveying & Land Informat Engn, Jiaozuo 454000, Henan, Peoples R China 4.Henan Univ, Minist Educ, Key Lab Geospatial Technol Middle & Lower Yellow, Kaifeng 475004, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Wenqi,Jin, Huaan,Shao, Huaiyong,et al. Temporal and Spatial Variations in the Leaf Area Index and Its Response to Topography in the Three-River Source Region, China from 2000 to 2017[J]. ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION,2021,10(1):Article. |
| APA | Zhang, Wenqi,Jin, Huaan,Shao, Huaiyong,Li, Ainong,Li, Shangzhi,&Fan, Wenjie.(2021).Temporal and Spatial Variations in the Leaf Area Index and Its Response to Topography in the Three-River Source Region, China from 2000 to 2017.ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION,10(1),Article. |
| MLA | Zhang, Wenqi,et al."Temporal and Spatial Variations in the Leaf Area Index and Its Response to Topography in the Three-River Source Region, China from 2000 to 2017".ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION 10.1(2021):Article. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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