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    Author(s): S. Oak; F. Tainter; J. Williams; D. Starkey
    Date: 1996
    Source: Ann. For. Sci., Vol. 53: 721-730
    Publication Series: Scientific Journal (JRNL)
    PDF: View PDF  (532.36 KB)


    Oak decline risk rating models were developed for upland hardwood forests in the southeastern United States using data gathered during regional oak decline surveys. Stepwise discriminant analyses were used to relate 12 stand and site variables with major oak decline incidence for each of three subregions plus one incorporating all subregions. The best model for the northern Appalachian subregion included soil depth class, oak basal area, site index, and stand age (R2 = 0.65). In the southern Appalachian subregion, significant variables included slope gradient, soil depth class, oak basal area, and clay content (R2 = 0.30). The Ozark model included clay content, slope gradient, and oak basal area (R2 = 0.32). The composite model included site index/age, clay content, slope gradient, soil depth class, and oak basal area (R2 = 0.22). The relatively low R2 values and variation in the relationships for some attributes suggest that major oak decline events may be influenced by additional factors.

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    Oak, S.; Tainter, F.; Williams, J.; Starkey, D. 1996. Oak decline risk rating for the southeastern United States. Ann. For. Sci., Vol. 53: 721-730


    oak decline, risk rating, predictive model

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