1. Texas Tech University, Lubbock, Texas, United States
2. University of Wisconsin–Madison, Madison, Wisconsin, United States
3. Memorial University, St. John's, Newfoundland and Labrador, Canada
4. University of California, Riverside, California, United States
5. Haire Laboratory for Landscape Ecology, Tucson, Arizona, United States
6. Columbia University, Palisades, New York, United States
7. University of Iowa, Iowa City, Iowa, United States
8. Brigham Young University, Provo, Utah, United States
9. University of Colorado Denver, Denver, Colorado, United States