NDLI: Long-term urbanization effects on tree canopy cover along an urban

Content Provider	Springer Nature Link
Author	Berland, Adam
Copyright Year	2012
Abstract	Urban forestry can benefit from improved knowledge of urbanization’s effects on tree canopy cover (TCC), a prominent urban forest indicator. This study examined changes in TCC over a long time frame, with respect to land cover (LC) changes, and across municipal boundaries. Specifically, I used air photos at 14 dates from 1937 to 2009 to develop an exceptionally long record of TCC change in Minnesota’s Twin Cities Metropolitan Area. During the study period overall TCC nearly doubled from 17% to 33% while the proportion urban land cover rose by 47%, highlighting the opportunity for substantial TCC gains following urbanization in previously agricultural landscapes, even in regions that were forested prior to European settlement. Results demonstrate that more intensely developed sites generally had lower TCC, and older urban sites had higher TCC. Modern TCC was not adequately characterized by linear distance along the urban–rural gradient, but instead peaked near the center of the gradient where mature residential neighborhoods are prevalent. Compared to other land cover changes, urbanization events caused the highest rate of immediate TCC loss (9.6% of events), yet urban areas had the second highest TCC (>35%) in 2009, indicating that urban land gained TCC relatively efficiently following development. The results of this study provide new historical context for urban forest management across an urban–rural gradient, and emphasize the need to consider ecological legacies and temporal lags following land cover changes when considering TCC goals in urban settings.
Starting Page	721
Ending Page	738
Page Count	18
File Format	PDF
ISSN	10838155
Journal	Urban Ecosystems
Volume Number	15
Issue Number	3
e-ISSN	15731642
Language	English
Publisher	Springer US
Publisher Date	2012-02-10
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Urban forest Tree canopy cover Urban–rural gradient Aerial photography Minnesota Environmental Management Urban Ecology Ecology Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Ecology Urban Studies

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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