气候变化领域集成服务门户(CCPortal): Multiple Effects of Topographic Factors on Spatio-Temporal Variations of Vegetation Patterns in the Three Parallel Rivers Region, Southeast Qinghai-Tibet Plateau

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DOI	10.3390/rs14010151
	Multiple Effects of Topographic Factors on Spatio-Temporal Variations of Vegetation Patterns in the Three Parallel Rivers Region, Southeast Qinghai-Tibet Plateau
	Wang, Chunya; Wang, Jinniu; Naudiyal, Niyati; Wu, Ning; Cui, Xia; Wei, Yanqiang; Chen, Qingtao
通讯作者	Wang, JN (通讯作者)，Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China. ; Wang, JN (通讯作者)，Ecol Secur Barrier Ecol Monitoring Network, Mangkang Ecol Monitoring Stn, Qamdo 854000, Peoples R China.
发表日期	2022
EISSN	2072-4292
卷号	14 期号:1
英文摘要	Topographic factors are critical for influencing vegetation distribution patterns, and studying the interactions between them can enhance our understanding of future vegetation dynamics. We used the Moderate-resolution Imaging Spectroradiometer Normalized Differential Vegetation Index (MODIS NDVI) image dataset (2000-2019), combined with the Digital Elevation Model (DEM), and vegetation type data for trend analysis, and explored NDVI variation and its relationship with topographic factors through an integrated geographically-weighted model in the Three Parallel Rivers Region (TPRR) of southeastern Qinghai-Tibet Plateau (QTP) in the past 20 years. Our results indicated that there was no significant increase of NDVI in the entire basin between 2000-2019, except for the Lancang River basin. In the year 2004, abrupt changes in NDVI were observed across the entire basin and each sub-basin. During 2000-2019, the mean NDVI value of the whole basin increased initially and then decreased with the increasing elevation. However, it changed marginally with variations in slope and aspect. We observed a distinct spatial heterogeneity in vegetation patterns with elevation, with higher NDVI in the southern regions NDVI than those in the north as a whole. Most of the vegetation cover was concentrated in the slope range of 8~35 degrees, with no significant difference in distribution except flat land. Furthermore, from 2000 to 2019, the vegetation cover in the TPRR showed an improving trend with the changes of various topographic factors, with the largest improvement area (36.10%) in the slightly improved category. The improved region was mainly distributed in the source area of the Jinsha River basin and the southern part of the whole basin. Geographically weighted regression (GWR) analysis showed that elevation was negatively correlated with NDVI trends in most areas, especially in the middle reaches of Nujiang River basin and Jinsha River basin, where the influence of slope and aspect on NDVI change was considerably much smaller than elevation. Our results confirmed the importance of topographic factors on vegetation growth processes and have implications for understanding the sustainable development of mountain ecosystems.
关键词	GEOGRAPHICALLY WEIGHTED REGRESSION CLIMATE-CHANGE ALPINE GRASSLAND DRIVING FACTORS TREND ANALYSIS DYNAMICS TREELINE MOUNTAIN NDVI TEMPERATURE
英文关键词	MODIS NDVI; vegetation cover; trend analysis; Sen plus Mann-Kendall; topography; GWR; Qinghai-Tibet Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000742974600001
来源期刊	REMOTE SENSING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254643
作者单位	[Wang, Chunya; Wang, Jinniu; Naudiyal, Niyati; Wu, Ning] Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China; [Wang, Chunya; Wang, Jinniu] Ecol Secur Barrier Ecol Monitoring Network, Mangkang Ecol Monitoring Stn, Qamdo 854000, Peoples R China; [Wang, Chunya; Chen, Qingtao] Chengdu Univ Technol, Earth Sci Coll, Chengdu 610059, Peoples R China; [Cui, Xia] Lanzhou Univ, Sch Resources & Environm Sci, Lanzhou 730000, Peoples R China; [Wei, Yanqiang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Wang, Chunya,Wang, Jinniu,Naudiyal, Niyati,et al. Multiple Effects of Topographic Factors on Spatio-Temporal Variations of Vegetation Patterns in the Three Parallel Rivers Region, Southeast Qinghai-Tibet Plateau[J]. 中国科学院西北生态环境资源研究院,2022,14(1).
APA	Wang, Chunya.,Wang, Jinniu.,Naudiyal, Niyati.,Wu, Ning.,Cui, Xia.,...&Chen, Qingtao.(2022).Multiple Effects of Topographic Factors on Spatio-Temporal Variations of Vegetation Patterns in the Three Parallel Rivers Region, Southeast Qinghai-Tibet Plateau.REMOTE SENSING,14(1).
MLA	Wang, Chunya,et al."Multiple Effects of Topographic Factors on Spatio-Temporal Variations of Vegetation Patterns in the Three Parallel Rivers Region, Southeast Qinghai-Tibet Plateau".REMOTE SENSING 14.1(2022).