1. U.S. Geological Survey, 3215 Marine Street, Boulder, Colorado 80303,
United States
2. Department
of Integrative Biology, University of Colorado, CB 171, Denver, Colorado 80217, United States
3. City of Boulder,
4049 75th Street, Boulder, Colorado 80301, United States
4. Department
of Integrative Physiology, University of Colorado, 354 UCB, Boulder, Colorado 80309, United States