Spectral characteristics of alpine grassland and their changes responding to grassland degradation on the Tibetan Plateau
文献类型：期刊论文
| 作者 | Liu, Bo1; You, Guangyong1; Li, Ru1; Shen, Weishou1; Yue, Yuemin1; Lin, Naifeng1 |
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2015 |
| 卷号 | 74期号:3页码:89-96 |
| 关键词 | Spectral analysis Alpine grassland Spectral characteristic Vegetation index Tibetan Plateau |
| 通讯作者 | Shen, WS (reprint author), Nanjing Inst Environm Sci, Minist Environm Protect, Nanjing 210042, Jiangsu, Peoples R China. |
| 英文摘要 | Remote sensing is used as the indispensable technology in alpine grassland degradation assessment especially at regional scale on the Tibetan Plateau. However, the lack of field spectral data, as the foundation of remote sensing, due to the formidable natural and climate conditions hinders the understanding of spectral characteristics of alpine grassland and their degradation assessment. In this study, spectral characteristics of alpine grasslands and their changes responding to degradation were explored. The results showed that the main spectral characteristics for discriminating the dominant species of alpine meadow (Kobresia littledalei and Kobresia pygmaea), alpine steppe (Stipa purpurea) and desert (Potentilla fruticosa) are spectral features of chlorophyll, cellulose and water which are related to their growth form, plant inclination and residue of withered leaf sheaths. The spectral curves of alpine meadow have a much smaller variety over the whole spectral region compared to those of alpine steppe and desert which generally have weaker chlorophyll and water absorption features and more noticeable non-vegetation features. Different grassland degradation processes exhibit different patterns of spectral characteristics change due to the species composition, vegetation succession, vegetation coverage and soil background. Grassland degradation can happen without obvious vegetation coverage reduction or even with an increment of NDVI (normalized difference vegetation index). Therefore, the assessment of grassland degradation cannot be fulfilled well using single vegetation index or spectral feature. The combination of several vegetation indices or hyperspectral remote sensing along with the priori knowledge is needed in order to perform the assessment more accurately in further studies. |
| 研究领域[WOS] | Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000358073800023 |
| 源URL | [http://ir.ceode.ac.cn/handle/183411/38408]  |
| 专题 | 遥感与数字地球研究所_SCI/EI期刊论文_期刊论文 |
| 作者单位 | 1.[Liu, Bo] Nanjing Univ Informat Sci & Technol, Sch Geog & Remote Sensing, Nanjing 210044, Jiangsu, Peoples R China 2.[You, Guangyong 3.Shen, Weishou 4.Lin, Naifeng] Nanjing Inst Environm Sci, Minist Environm Protect, Nanjing 210042, Jiangsu, Peoples R China 5.[Li, Ru] Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China 6.[Yue, Yuemin] Chinese Acad Sci, Inst Subtrop Agr, Changsha 410125, Hunan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Bo,You, Guangyong,Li, Ru,et al. Spectral characteristics of alpine grassland and their changes responding to grassland degradation on the Tibetan Plateau[J]. ENVIRONMENTAL EARTH SCIENCES,2015,74(3):89-96. |
| APA | Liu, Bo,You, Guangyong,Li, Ru,Shen, Weishou,Yue, Yuemin,&Lin, Naifeng.(2015).Spectral characteristics of alpine grassland and their changes responding to grassland degradation on the Tibetan Plateau.ENVIRONMENTAL EARTH SCIENCES,74(3),89-96. |
| MLA | Liu, Bo,et al."Spectral characteristics of alpine grassland and their changes responding to grassland degradation on the Tibetan Plateau".ENVIRONMENTAL EARTH SCIENCES 74.3(2015):89-96. |
入库方式： OAI收割
来源：遥感与数字地球研究所
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