干旱区生态环境知识资源中心(Arid): Spatial associations between NDVI and environmental factors in the Heihe River Basin

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	Spatial associations between NDVI and environmental factors in the Heihe River Basin
	Yuan Lihua; Chen Xiaoqiang; Wang Xiangyu; Xiong Zhe; Song Changqing
来源期刊	Journal of Geographical Sciences
ISSN	1009-637X
出版年	2019
卷号	29 期号:9 页码:1548-1564
英文摘要	The Heihe River Basin is located in the arid and semi-arid regions of Northwest China. Here, the terrestrial ecosystem is vulnerable, making it necessary to identify the factors that could affect the ecosystem. In this study, MODIS-NDVI data with a 250-m resolution were used as a proxy for the terrestrial ecosystem. By combining these with environmental factors, we were able to explore the spatial features of NDVI and identify the factors influencing the NDVI distribution in the Heihe River Basin during the period of 2000-2016. A geographical detector (Geodetector) was employed to examine the spatial heterogeneity of the NDVI and to explore the factors that could potentially influence the NDVI distribution. The results indicate that: (1) the NDVI in the Heihe River Basin appeared high in the southeast while being low in the north, showing spatial heterogeneity with a q-statistic of 0.38. The spatial trend of the vegetation in the three sub-basins generally increased in the growing seasons from 2000 to 2016; (2) The results obtained by the Geodetector (as denoted by the q-statistic as well as the degree of spatial association between the NDVI and environmental factors) showed spatial heterogeneity in the associations between the NDVI and the environmental factors for the overall basin as well as the sub-basins. Precipitation was the dominant factor for the overall basin. In the upper basin, elevation was found to be the dominant factor. The dominant factor in the middle basin was precipitation, closely followed by the soil type. In the lower basin, the dominant factor was soil type with a lower q-statistic of 0.13, and the dominant interaction between the elevation and soil type was nonlinearly enhanced (q-statistic = 0.22).
英文关键词	NDVI environmental factors vegetation Geodetector q-statistic spatial heterogeneity Heihe River Basin
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6544154
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336151
作者单位	Yuan Lihua, Center for GeoData and Analysis, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China.; Chen Xiaoqiang, Center for GeoData and Analysis, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China.; Wang Xiangyu, Center for GeoData and Analysis, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China.; Xiong Zhe, Institute of Atmospheric Physics, CAS, Key Laboratory of Climate-Environment for East Asia, CAS, Beijing 100029, China.; Song Changqing, Center for GeoData and Analysis, Faculty of Geographical Science, Beijing Normal University;;Beijing Normal University;;Beijing Normal University, ;;State Key Laboratory of Earth Surface Processes and Resource Ecology;;Key Laboratory of Environmental Change and Natural Disaster, ;;;;, Beijing;;Beijing;;Beijing 100875;;100875;;100875.
推荐引用方式 GB/T 7714	Yuan Lihua,Chen Xiaoqiang,Wang Xiangyu,et al. Spatial associations between NDVI and environmental factors in the Heihe River Basin[J],2019,29(9):1548-1564.
APA	Yuan Lihua,Chen Xiaoqiang,Wang Xiangyu,Xiong Zhe,&Song Changqing.(2019).Spatial associations between NDVI and environmental factors in the Heihe River Basin.Journal of Geographical Sciences,29(9),1548-1564.
MLA	Yuan Lihua,et al."Spatial associations between NDVI and environmental factors in the Heihe River Basin".Journal of Geographical Sciences 29.9(2019):1548-1564.