Connectivity of the American agricultural landscape: Assessing the national risk of crop pest and disease spread

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dc.contributor.author Margosian, Margaret L.
dc.contributor.author Garrett, Karen A.
dc.contributor.author Hutchinson, J. M. Shawn
dc.contributor.author With, Kimberly A.
dc.date.accessioned 2008-12-08T21:14:15Z
dc.date.available 2008-12-08T21:14:15Z
dc.identifier.uri http://hdl.handle.net/2097/1049
dc.description.abstract More than two-thirds of cropland in the United States is devoted to the production of just four crop species—maize, wheat, soybeans, and cotton— raising concerns that homogenization of the American agricultural landscape could facilitate widespread disease and pest outbreaks, compromising the national food supply. As a new component in national agricultural risk assessment, we employed a graph-theoretic approach to examine the connectivity of these crops across the United States. We used county crop acreage to evaluate the landscape resistance to transmission—the degree to which host availability limits spread in any given region—for pests or pathogens dependent on each crop. For organisms that can disperse under conditions of lower host availability, maize and soybean are highly connected at a national scale, compared with the more discrete regions of wheat and cotton production. Determining the scales at which connectivity becomes disrupted for organisms with different dispersal abilities may help target rapid-response regions and the development of strategic policies to enhance agricultural landscape heterogeneity. en
dc.language.iso en_US en
dc.subject Geographic information systems en
dc.subject Graphy theory en
dc.subject Invasive species en
dc.subject Landscape connectivity en
dc.subject Networks en
dc.title Connectivity of the American agricultural landscape: Assessing the national risk of crop pest and disease spread en
dc.type Article en
dc.date.published 2009 en
dc.citation.epage 151 en
dc.citation.issue 2 en
dc.citation.jtitle BioScience en
dc.citation.spage 141 en
dc.citation.volume 59 en


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