Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Frank H. Koch; Denys Yemshanov; Roger D. Magarey; William D. Smith
    Date: 2012
    Source: J. Econ. Entomol. 105(2):438-450
    Publication Series: Scientific Journal (JRNL)
    Station: Southern Research Station
    PDF: View PDF  (517.48 KB)

    Description

    Recreational travel is a recognized vector for the spread of invasive species in North America. However, there has been little quantitative analysis of the risks posed by such travel and the associated transport of firewood. In this study, we analyzed the risk of forest insect spread with firewood and estimated related dispersal parameters for application in geographically explicit invasion models. Our primary data source was the U.S. National Recreation Reservation Service database, which records camper reservations at >2,500 locations nationwide. For >7 million individual reservations made between 2004 and 2009 (including visits from Canada), we calculated the distance between visitor home address and campground location.We constructed an empirical dispersal kernel (i.e., the probability distribution of the travel distances) from these “origin-destination” data, and then fitted the data with various theoretical distributions. We found the data to be strongly leptokurtic (fat-tailed) and fairly well fit by the unbounded Johnson and lognormal distributions. Most campers (~53%) traveled <100 km, but ~10% traveled >500 km (and as far as 5,500 km). Additionally, we examined the impact of geographic region, specific destinations (major national parks), and specific origin locations (major cities) on the shape of the dispersal kernel, and found that mixture distributions (i.e., theoretical distribution functions composed of multiple univariate distributions) may fit better in some circumstances. Although only a limited amount of all transported firewood is likely to be infested by forest insects, this still represents a considerable increase in dispersal potential beyond the insects' natural spread capabilities.

    Publication Notes

    • You may send email to pubrequest@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Koch, Frank H.; Yemshanov, Denys; Magarey, Roger D.; Smith, William D. 2012. Dispersal of Invasive Forest Insects via Recreational Firewood: A Quantitative Analysis. J. Econ. Entomol. 105(2):438-450.

    Keywords

    biological invasion, firewood, invasive forest pest, human-mediated dispersal, long-distance dispersal

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page