气候变化领域集成服务门户(CCPortal): Spatial and Temporal Variation in Vegetation Cover and Its Response to Topography in the Selinco Region of the Qinghai-Tibet Plateau

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DOI	10.3390/rs15164101
	Spatial and Temporal Variation in Vegetation Cover and Its Response to Topography in the Selinco Region of the Qinghai-Tibet Plateau
	Huang, Hongxin; Xi, Guilin; Ji, Fangkun; Liu, Yiyang; Wang, Haoran; Xie, Yaowen
发表日期	2023
EISSN	2072-4292
卷号	15 期号:16
英文摘要	In recent years, the vegetation cover in the Selinco region of the Qinghai-Tibet Plateau has undergone significant changes due to the influence of global warming and intensified human activity. Consequently, comprehending the distribution and change patterns of vegetation in this area has become a crucial scientific concern. To address this concern, the present study employed MODIS-NDVI and elevation data, integrating methodologies such as trend analysis, Hurst exponent analysis, and sequential cluster analysis to explore vegetation cover changes over the past 21 years and predict future trends, while examining their correlation with topographic factors. The study findings indicate a fluctuating upward trend in vegetation cover, with a notable decrease in 2015. Spatially, the overall fractional vegetation cover (FVC) in the study area showed a basic stability with a percentage of 78%. The analysis of future trends in vegetation cover revealed that the majority of areas (68.26%) exhibited an uncertain trend, followed by stable regions at 15.78%. The proportion of areas showing an increase and decrease in vegetation cover accounted for only 9.63% and 5.61%, respectively. Elevation and slope significantly influence vegetation cover, with a trend of decreasing vegetation cover as elevation increases, followed by an increase, and then another decrease. Likewise, as the slope increases, initially, there is a rise in vegetation cover, followed by a subsequent decline. Notably, significant abrupt changes in vegetation cover are observed within the 4800 m elevation band and the 4 & DEG; slope band in the Selinco region. Moreover, aspect has no significant effect on vegetation cover. These findings offer comprehensive insights into the spatial and temporal variations of vegetation cover in the Selinco region and their association with topographic factors, thus serving as a crucial reference for future research.
关键词	fractional vegetation cover spatial and temporal variation characteristics trend analysis Hurst exponent topographic factor
英文关键词	ALPINE GRASSLAND; CLIMATE-CHANGE; ANTHROPOGENIC ACTIVITIES; DEGRADED MEADOWS; MODIS DATA; DYNAMICS; NDVI; PERMAFROST; PROTECTION; INDEX
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:001057104600001
来源期刊	REMOTE SENSING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283317
作者单位	Lanzhou University
推荐引用方式 GB/T 7714	Huang, Hongxin,Xi, Guilin,Ji, Fangkun,et al. Spatial and Temporal Variation in Vegetation Cover and Its Response to Topography in the Selinco Region of the Qinghai-Tibet Plateau[J],2023,15(16).
APA	Huang, Hongxin,Xi, Guilin,Ji, Fangkun,Liu, Yiyang,Wang, Haoran,&Xie, Yaowen.(2023).Spatial and Temporal Variation in Vegetation Cover and Its Response to Topography in the Selinco Region of the Qinghai-Tibet Plateau.REMOTE SENSING,15(16).
MLA	Huang, Hongxin,et al."Spatial and Temporal Variation in Vegetation Cover and Its Response to Topography in the Selinco Region of the Qinghai-Tibet Plateau".REMOTE SENSING 15.16(2023).