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    Author(s): Lester O. Dillard; Kevin R. Russell; W. Mark Ford
    Date: 2008
    Source: Applied Herpetology. 5: 201-224.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (1.55 MB)

    Description

    The federally threatened Cheat Mountain salamander (Plethodon nettingi; hereafter CMS) is known to occur at approximately 70 small, scattered sites in the Allegheny Mountains of eastern West Virginia. We used a comparative modeling approach to explain the landscape-level distribution and habitat relationships of CMS in relation to a suite of biotic and abiotic habitat variables measured across the species' range. We collected data on 13 explanatory macrohabitat variables at CMS-occupied (n = 180) and random (n = 180) sites. We then examined CMS-macrohabitat relationships using a priori, logistic regression models with information-theoretic model selection, classification tree modeling, and discriminant function analysis. Among logistic regression models, a model containing the variables elevation, aspect, slope, and lithology received the strongest empirical support, although a model containing these variables and current vegetation type also received limited support. Variable selection within our classification tree and discriminant function modeling was consistent with logistic regression results.

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    Citation

    Dillard, Lester O.; Russell, Kevin R.; Ford, W. Mark. 2008. Macrohabitat models of occurrence for the threatened Cheat Mountain salamander, Plethodon nettingi. Applied Herpetology. 5: 201-224.

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