1. V. H. Dale is at the Oak Ridge National Laboratory, Oak Ridge, TN 37831-6036, USA.
2. C. M. Crisafulli is with the U.S. Department of Agriculture (USDA) Forest Service, Pacific Northwest Research Station, Forestry Sciences Laboratory, Olympia, WA 98512, USA.
3. F. J. Swanson is at the USDA Forest Service, Pacific Northwest Research Station, Forestry Sciences Laboratory, Corvallis, OR 97331, USA.