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DOI10.3390/f14091835
Spatiotemporal Analysis of Vegetation Cover in Relation to Its Driving Forces in Qinghai-Tibet Plateau
Xu, Tong; Wu, Hua
发表日期2023
EISSN1999-4907
卷号14期号:9
英文摘要The Tibet Plateau of Qinghai supports complex vegetation types that are ecologically fragile and sensitive to climatic factors. Therefore, it is important to understand the changes in vegetation and the factors responsible for these changes and to maintain the ecosystem balance and promote sustainable development in the region. Therefore, this paper is based on annual SPOT/VEG NDVI (Normalized Difference Vegetation Index) data, land use data, topographic data, temperature data, and precipitation data from 1999 to 2019. The spatiotemporal variation in the NDVI over the Tibetan Plateau in the last 21 years and its response to different driving factors were investigated by using the Theil-Sen slope method, Mann-Kendall test, partial correlation analysis, and geographical detector method. The results showed that (1) the vegetation coverage on the Qinghai-Tibet Plateau showed an increasing trend from 1999 to 2019, with increases in approximately 67.00% of the plateau area. (2) The spatial differences in vegetation coverage were large; notably, low-density vegetation areas decreased obviously, moderate-density vegetation areas accounted for approximately 50% of the total area, high-density vegetation areas were the least common, and the overall growth rate was significant. (3) The NDVI was positively correlated with temperature and precipitation, and a positive correlation was observed in more than 66% of the region. (4) The order of the influence of single driving factors on the NDVI was as follows: precipitation > soil type > altitude > temperature > gradient > slope > population density > GDP. (5) The combined effect of the factors was significantly higher than that of single driving factors, with a notable nonlinear influence. The interactions between meteorological factors, such as precipitation, and topographic factors, such as altitude, were important, with a q-value over 0.79. The results of this study provide some methodological support for the ecological conservation of the Tibetan Plateau, and at the same time establish a scientific and reasonable strategy for vegetation restoration.
关键词Qinghai-Tibet plateauNormalized Difference Vegetation Index (NDVI)spatial and temporal changesdriving forcesgeographic detector
英文关键词CLIMATE; RESPONSES; NDVI; TEMPERATURE; GRASSLANDS; INCREASE
WOS研究方向Forestry
WOS记录号WOS:001076509400001
来源期刊FORESTS
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/282566
作者单位Tibet University
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GB/T 7714
Xu, Tong,Wu, Hua. Spatiotemporal Analysis of Vegetation Cover in Relation to Its Driving Forces in Qinghai-Tibet Plateau[J],2023,14(9).
APA Xu, Tong,&Wu, Hua.(2023).Spatiotemporal Analysis of Vegetation Cover in Relation to Its Driving Forces in Qinghai-Tibet Plateau.FORESTS,14(9).
MLA Xu, Tong,et al."Spatiotemporal Analysis of Vegetation Cover in Relation to Its Driving Forces in Qinghai-Tibet Plateau".FORESTS 14.9(2023).
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