1. Associate Professor, Dept. of Human Dimensions of Natural Resources and Research Scientist, Natural Resource Ecology Lab, Colorado State Univ., Fort Collins, CO 80523-1480 (corresponding author).
2. Senior Scientist, Woods Hole Research Center, Falmouth, MA 02540-1644.
3. Research Associate, Natural Resource Ecology Lab, Colorado State Univ., Fort Collins, CO 80523-1499.
4. Ph.D. Candidate, Bren School of Environmental Science & Management, Univ. of California, Santa Barbara, CA 93106.