1. Visiting Assistant Professor, School of Environment and Natural Resources, Ohio State Univ., 210 Kottman Hall, 2021 Coffey Rd., Columbus, OH 43212 (corresponding author).
2. Associate Professor, Dept. of Forest Engineering, Resources and Management, Oregon State Univ., 280 Peavy Hall, Corvallis, OR 97331.
3. Faculty Research Assistant, Dept. of Forest Engineering, Resources and Management, Oregon State Univ., 267 Peavy Hall, Corvallis, OR 97331.