DOI: 10.1016/j.ufug.2020.126638
论文题名: The increase of impervious cover and decrease of tree cover within urban areas globally (2012–2017)
作者: Nowak D.J. ; Greenfield E.J.
刊名: Urban Forestry and Urban Greening
ISSN: 16188667
出版年: 2020
卷: 49 语种: 英语
英文关键词: Ecosystem services
; Forest monitoring
; Impervious surfaces
; Tree cover change
; Urban forests
Scopus关键词: ecosystem service
; environmental quality
; forest management
; grassland
; spatiotemporal analysis
; tree
; urban area
; urban forestry
; Africa
; Europe
英文摘要: Trees in cities provide numerous benefits to society by altering the local physical, biological and social environment, providing billions of dollars in annual benefits. How tree and other cover types vary and are changing globally within urban areas is currently unknown. Photo-interpretation was used to determine current urban cover (tree, impervious, grass, other cover) percentages and recent changes in cover types throughout the world. Within existing urban areas, the average global urban tree cover had a slight, but statistically significant decline from 26.7 % to 26.5 % (c. 2012–2017), or a loss of about 40,000 ha per year. All continents exhibited a loss in urban tree cover except for Europe; the greatest decrease in percent tree cover was in Africa. Concurrent with tree loss was an increase in impervious cover among all continents, which globally had a statistically significant increase from 24.3 % to 25.9 % (326,000 ha/year). Urban tree cover was significantly different among forested (30.6 %), grassland (18.5 %) and desert regions (12.6 %). Understanding global urban cover type variation and changes can improve global assessments and help guide forest management to improve environmental quality in cities. © 2020 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158921
Appears in Collections: 气候变化与战略
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作者单位: USDA Forest Service, Northern Research Station, 5 Moon Library, SUNY-ESF, Syracuse, NY 13210, United States
Recommended Citation:
Nowak D.J.,Greenfield E.J.. The increase of impervious cover and decrease of tree cover within urban areas globally (2012–2017)[J]. Urban Forestry and Urban Greening,2020-01-01,49