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    Constraints on Interpretation of Ecological Niche Models by Limited Environmental Ranges on Calibration Areas: Software Script Appendix

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    Code for 1-dimensional plots (1.996Kb)
    Code for MOP calculations (12.54Kb)
    Issue Date
    2012-09-21
    Author
    Owens, Hannah L.
    Campbell, Lindsay P.
    Dornak, Laura Lynnette
    Saupe, Erin E.
    Barve, Narayani Vijay
    Soberón, Jorge
    Ingenloff, Kathryn
    Lira-Noriega, Andrés
    Hensz, Christopher
    Myers, Corinne Emanuelle
    Peterson, A. Townsend
    Type
    Software
    Metadata
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    Abstract
    A common application of correlational models of ecological niches of species is to transfer model rules onto other sets of conditions to evaluate distributional potential under those conditions. As with any model fitting exercise, however, interpretation of model predictions outside of the range of the independent variables on which models were calibrated is perilous. We use novel visualization techniques to characterize model response surfaces for a variety of niche modeling algorithms for a virtual species (wherein the truth is known) and for two transfer-based studies published by one of our group. All modeling algorithms, for each species, showed some sort of extrapolation, such that biologically unrealistic responses were reconstructed. We present MOP metrics, a correction and simplification of MESS metrics currently in use, as a means of identifying areas where such extrapolation is likely. We also discuss the implications of these results for studies of ecological niche evolution. Note: This item consists of R code for implementing two of the analyses developed in this paper.
    Description
    Software for 1-dimensional plots of species' responses to environment, and for MOP calculations.
    URI
    http://hdl.handle.net/1808/10122
    Collections
    • Center for Latin American and Caribbean Studies Scholarly Works [738]
    • Distinguished Professors Scholarly Works [918]
    • Ecology & Evolutionary Biology Scholarly Works [1516]

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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