Skip common site navigation and headers
United States Environmental Protection Agency
Exposure Research
Begin Hierarchical Links EPA Home > Research & Development > Exposure Research > Publications/Presentations > End Hierarchical Links

 

Use of Road Maps in National Assessments of Forest Fragmentation in the United States

spacer
spacer
Abstract:Including road-mediated forest fragmentation is a contentious issue in United States national assessments. We compared fragmentation as calculated from national land-cover maps alone, and from land-cover maps in combination with road maps. The increment of forest edge from roads was highest in the Pacific Northwest and Appalachian Mountain regions. Elsewhere, roads were typically associated with sufficient nonforest land-cover that most of the road-mediated fragmentation was already evident on land-cover maps. Over most of the United States, land-cover maps alone accounted for at least 80 percent of forest edge, and depending on the observation scale, 89 to l00 percent of the fragmentation of core forest. Using roads to delineate forest patches caused indices of the number, size, and distance between forest patches to change much more substantially but, in many places, illogically.
spacer
Citation:Riitters, K. H., J. D. Wickham, and J. W. Coulston. Use of Road Maps in National Assessments of Forest Fragmentation in the United States. C.S. Holling, Carl Folke, Lance Gunderson, Michelle Lee, Allyson Quinlan (ed.), CONSERVATION ECOLOGY 9(2):13,online, (2005).
spacer
spacer
Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
spacer
Division: Environmental Sciences Division
spacer
Branch: Landscape Ecology Branch
spacer
Product Type: Journal
spacer
Published: 02/15/2005
spacer
Related Entries:
spacer
Bullet Item Mrlc-Land Cover Mapping, Accuracy Assessment and Application Research
spacer Relationship Reason:   A Project of the Product
spacer
spacer
spacer

 

ORD Home | Search EPA | Search NERL | Search EIMS | Contacts | Help

 
Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us

Last Updated on Monday, October 22, 2007
URL: http://cfpub.epa.gov