Effects of rapid urbanization on vegetation cover in the metropolises of China over the last four decades

doi:10.1016/j.ecolind.2019.105458

	Effects of rapid urbanization on vegetation cover in the metropolises of China over the last four decades
	Du, Jiaqiang 1,2; Fu, Qing 2; Fang, Shifeng 3; Wu, Jinhua 1,2; He, Ping 1,2; Quan, Zhanjun 1,2
刊名	ECOLOGICAL INDICATORS
	2019-12-01
卷号	107 页码:11
关键词	Nighttime light data Normalized difference vegetation index (NDVI) Urbanized area Buffers Comparative analysis The valid influence distance
ISSN号	1470-160X
DOI	10.1016/j.ecolind.2019.105458
通讯作者	Quan, Zhanjun(quanzj@craes.org.cn)
英文摘要	A better understanding the effects of urbanization on vegetation is vital to promoting the sustainable development of cities in China, which has also experienced the world's most remarkable urbanization during the past decades. This paper used satellite-derived night light, vegetation index, and socio-economic data to analyze spatio-temporal patterns of vegetation changes and evaluate the influence of urbanization on vegetation cover in 46 Chinese metropolises over the last four decades. To examine the effects of urbanization on vegetation and its valid distance, we proposed a new method of comparing three indicators, namely, annual average normalized difference vegetation index (NDVI), long-term trend of NDVI change and the proportion of pixels characterized by significant change in NDVI between built-up areas and its multiple buffer zones. The results showed that the effects of urbanization on vegetation have obvious spatial differences. Urbanization generally resulted in the decrease of vegetation coverage in built-up areas for most of China's central and eastern metropolises, while in Western China, usually restricted by natural conditions, the urbanization usually improved vegetation coverage. The rates of increase in NDVI were significant lower than that of the buffer zones for most cities in central and eastern China. Urbanized areas of most cities located in central and eastern China had a higher percent of vegetation pixels, representing degradation than that in the buffer zones. The opposite was true for pixels representing vegetation restoration. The changes of NDVI in the cities in Western China were basically contrary to those in central and eastern China. The impacts of urbanization on vegetation are stage-specific. With the continuous progress of urbanization level, the adverse effect of urbanization on vegetation were gradually diminished or even disappeared. Cities with higher nighttime light levels appeared to have less vegetation coverage in the early years, and negative correlations between mean NDVI and the mean digital number value have become weak in more recent years. The changes in NDVI in urbanized areas of most cities significantly followed a 'U' shape. This phenomenon may further suggest that positive effects of urbanization become more obvious over time during advanced urbanization. The spatial scope of the impacts of urbanization on vegetation was beyond the urban built-up areas, and the effect intensity appeared to attenuate as the buffer distance became further away from the urbanized area. The valid distance of impacts of urbanization on vegetation is generally about 30-40 km.
资助项目	National Key Research and Development Program of China[2016YFC0500401-5] ; National Science Foundation of China[41001055]
WOS关键词	NIGHTTIME LIGHT DATA ; NET PRIMARY PRODUCTIVITY ; ECOSYSTEM SERVICES ; LAND DEGRADATION ; URBAN EXPANSION ; SPATIOTEMPORAL TRENDS ; TEMPORAL TREND ; TIME-SERIES ; DYNAMICS ; GROWTH
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000490757500004
资助机构	National Key Research and Development Program of China ; National Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/129815]
专题	中国科学院地理科学与资源研究所
通讯作者	Quan, Zhanjun
作者单位	1.Chinese Res Inst Environm Sci, State Key Lab Environm Protect Reg Ecoproc & Func, Beijing 100012, Peoples R China 2.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Du, Jiaqiang,Fu, Qing,Fang, Shifeng,et al. Effects of rapid urbanization on vegetation cover in the metropolises of China over the last four decades[J]. ECOLOGICAL INDICATORS,2019,107:11.
APA	Du, Jiaqiang,Fu, Qing,Fang, Shifeng,Wu, Jinhua,He, Ping,&Quan, Zhanjun.(2019).Effects of rapid urbanization on vegetation cover in the metropolises of China over the last four decades.ECOLOGICAL INDICATORS,107,11.
MLA	Du, Jiaqiang,et al."Effects of rapid urbanization on vegetation cover in the metropolises of China over the last four decades".ECOLOGICAL INDICATORS 107(2019):11.