1. Department of Geography University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
2. Department of Biology Duke University Durham North Carolina USA
3. National Ecological Observatory Network Battelle Colorado USA
4. Yale University New Haven Connecticut USA
5. Center for Limnology and Department of Integrative Biology University of Wisconsin–Madison Madison Wisconsin USA
6. Department of Biological Sciences Virginia Tech Blacksburg Virginia USA
7. Flathead Lake Biological Station The University of Montana Bigfork Montana USA