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): E. L. Landguth; B. K. Hand; J. M. Glassy; S. A. Cushman; R. T. Carlson
    Date: 2011
    Source: Missoula, MT: University of Montana, Division of Biological Sciences, Computational Ecology Laboratory. 14 p. Online:
    Publication Series: Scientific Journal (JRNL)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (570.57 KB)


    Habitat loss and its effects on populations of vulnerable species is among the most urgent problems in conservation ecology. It is critical that managers and scientists have effective tools to evaluate the effects of landuse and climate change on the extent and connectivity of populations. To address this need, we introduce UNIversal CORridor network simulator (UNICOR), a species connectivity and corridor identification tool. UNICOR applies Dijkstra's shortest path algorithm to individual-based simulations. Outputs can be used to designate movement corridors, identify isolated populations, quantify effects of climate and management changes on population connectivity and prioritize conservation plans to maintain population connectivity. The key features include a driver-module framework, connectivity mapping with thresholding and buffering, and calculation of graph theory metrics. Through parallel-processing, computational efficiency is greatly improved, allowing analyses of large extents (grid dimensions of thousands) and large populations (individuals in the thousands).

    Publication Notes

    • You may send email to 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.


    Landguth, E. L.; Hand, B. K.; Glassy, J. M.; Cushman, S. A.; Carlson, R. T. 2011. UNICOR Users Manual. Missoula, MT: University of Montana, Division of Biological Sciences, Computational Ecology Laboratory. 14 p. Online:


    UNIversal CORridor network simulator (UNICOR), habitat loss, species connectivity, corridor identification

    Related Search

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