Jeffrey P. Prestemon and Karen Lee Abt are Research Foresters, John Pye is Ecologist, and David N. Wear is Project Leader, all in the Forest Service’s Southern Research Station, Forestry Sciences Laboratory, P.O. Box 12254, Research Triangle Park, NC, 27709. Chris LeDoux is with the Northeastern Research Station, 180 Canfield St., Morgantown, WV, 26505
