DOI: 10.1111/gcb.14317
Scopus记录号: 2-s2.0-85051495026
论文题名: Vegetation growth enhancement in urban environments of the Conterminous United States
作者: Jia W. ; Zhao S. ; Liu S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 9 起始页码: 4084
结束页码: 4094
语种: 英语
英文关键词: direct effect
; enhanced vegetation index
; global environmental change
; indirect effect
; remote sensing
; urban intensity
; urban-rural gradients
; vegetation growth
英文摘要: Cities are natural laboratories for studying vegetation responses to global environmental changes because of their climate, atmospheric, and biogeochemical conditions. However, few holistic studies have been conducted on the impact of urbanization on vegetation growth. We decomposed the overall impacts of urbanization on vegetation growth into direct (replacement of original land surfaces by impervious built-up) and indirect (urban environments) components, using a conceptual framework and remotely sensed data for 377 metropolitan statistical areas (MSAs) in the conterminous United States (CONUS) in 2001, 2006, and 2011. Results showed that urban pixels are often greener than expected given the amount of paved surface they contain. The vegetation growth enhancement due to indirect effects occurred in 88.4%, 90.8%, and 92.9% of urban bins in 2001, 2006, and 2011, respectively. By defining offset value as the ratio of the absolute indirect and direct impact, we obtained that growth enhancement due to indirect effects compensated for about 29.2%, 29.5%, and 31.0% of the reduced productivity due to loss of vegetated surface area on average in 2001, 2006, and 2011, respectively. Vegetation growth responses to urbanization showed little temporal variation but large regional differences with higher offset value in the western CONUS than in the eastern CONUS. Our study highlights the prevalence of vegetation growth enhancement in urban environments and the necessity of differentiating various impacts of urbanization on vegetation growth, and calls for tailored field experiments to understand the relative contributions of various driving forces to vegetation growth and predict vegetation responses to future global change using cities as harbingers. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110238
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: College of Urban and Environmental Sciences, Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing, China; National Engineering Laboratory of Forest Ecology and Applied Technology for Southern China and College of Biological Science and Technology, Central South University of Forest and Technology, Changsha, China
Recommended Citation:
Jia W.,Zhao S.,Liu S.. Vegetation growth enhancement in urban environments of the Conterminous United States[J]. Global Change Biology,2018-01-01,24(9)