Results 211 to 220 of about 30,596 (253)

Urban Forests on the Front Line

Science, 2014
In their Review “The consequence of tree pests and diseases for ecosystem services” (15 November 2013, p. [823][1]), I. L. Boyd et al. discuss the effects of pests on forest ecosystem services. However, urban forests garnered little attention.
C A, Nock, O, Taugourdeau, T, Work, C, Messier, D, Kneeshaw   +4 more
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Forest Urbanisms

A radical redefinition of how humanity occupies the earth — through forestry, agriculture, and settlement — and rearticulates environmental stewardship by intertwining ecologies and urbanisms, this publication brings together essays by scholars in forestry, urbanism and other disciplines, designers, practitioners and policy makers.
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Assessing urban forest effects and values, Minneapolis' urban forest

2006
An analysis of trees in Minneapolis, MN, reveals that the city has about 979,000 trees with canopies that cover 26.4 percent of the area. The most common tree species are green ash, American elm, and boxelder. The urban forest currently stores about 250,000 tons of carbon valued at $4.6 million.
David J. Nowak, Robert E. III Hoehn, Daniel E. Crane, Jack C. Stevens, Jeffrey T. Walton   +4 more
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Assessing urban forest effects and values, Philladelphia's urban forest

2007
An analysis of trees in Philadelphia reveals that this city has about 2.1 million trees with canopies that cover 15.7 percent of the area. The most common tree species are black cherry, crabapple, and tree of heaven. The urban forest currently stores about 530,000 tons of carbon valued at $9.8 million.
David J. Nowak, Robert E., III Hoehn, Daniel E. Crane, Jack C. Stevens, Jeffrey T. Walton   +4 more
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Monitoring urban forest health

Environmental Monitoring and Assessment, 1993
Renewed interest in urban forestry has resulted in significant public investment in trees during the past few years, yet comprehensive urban forest monitoring programs are uncommon. Monitoring is an integral component of a program to sustain healthy community forests and long term flows of net benefits. Volunteer-based monitoring will promote continued
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Assessing urban forest effects and values: Morgantown's Urban Forest

2012
An analysis of the community forest in Morgantown, WV, was undertaken in 2004 to characterize the structural and functional attributes of this forest resource. The assessment revealed that this city has about 658,000 trees with canopies that cover 35.5 percent of the area. The most common tree species are sugar maple, black cherry, and hawthorn.
David J. Nowak, Robert E. III Hoehn, Daniel E. Crane, Jack C. Stevens, Jonathan Cumming, Sandhya Mohen, Anne Buckelew. Cumming   +6 more
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Assessing urban forest effects and values: Toronto's urban forest

2013
An analysis of trees in Toronto, Ontario, reveals that this city has about 10.2 million trees with a tree and shrub canopy that covers approximately 26.6 percent of the city. The most common tree species are eastern white-cedar, sugar maple, and Norway maple. The urban forest currently stores an estimated 1.1 million metric tons of carbon valued at CAD$
David J. Nowak, Robert E. III Hoehn, Allison R. Bodine, Eric J. Greenfield, Alexis Ellis, Theodore A. Endreny, Yang Yang, Tian Zhou, Ruthanne. Henry   +8 more
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Assessing urban forest effects and values, Chicago's urban forest

2010
An analysis of trees in Chicago, IL, reveals that this city has about 3,585,000 trees with canopies that cover 17.2 percent of the area. The most common tree species are white ash, mulberry species, green ash, and tree-of-heaven. Chicago's urban forest currently stores about 716,000 tons of carbon valued at $14.8 million.
David J. Nowak, Robert E. III Hoehn, Daniel E. Crane, Jack C. Stevens, Cherie Leblanc Fisher   +4 more
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Ozone and urban forests in Italy

Environmental Pollution, 2009
Ozone levels along urban-to-rural gradients in three Italian cities (Milan, Florence, Bari) showed that average AOT40 values at rural and suburban sites were 2.6 times higher than those determined at urban sites. However, O(3) also exceeded the European criteria to protect forest health at urban sites, even when the standards for human health ...
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Assessing urban forest effects and values, Scranton's urban forest

2010
An analysis of trees in the urbanized portion of Scranton, PA, reveals that this area has about 1.2 million trees with canopies that cover 22.0 percent of the area. The most common tree species are red maple, gray birch, black cherry, northern red oak, and quaking aspen. Scranton's urban forest currently store about 93,300 tons of carbon valued at $1.9
David J. Nowak, Robert E. III Hoehn, Daniel E. Crane, Jack C. Stevens, Vincent. Cotrone   +4 more
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