1. Center for the Environmental Implications of Nanotechnology (CEINT); Duke University; Durham North Carolina 27708 USA
2. Department of Biology; Duke University; Durham North Carolina 27708 USA
3. Department of Ecosystem and Conservation Sciences; University of Montana; Missoula Montana 59812 USA
4. Department of Biology; Baylor University; Waco Texas 76798 USA
5. Department of Civil and Environmental Engineering; Carnegie Mellon University; Pittsburgh Pennsylvania 15289 USA
6. Department of Civil and Environmental Engineering; Duke University; Durham North Carolina 27708 USA
7. Duke University Wetland Center; Nicholas School of the Environment; Duke University; Durham North Carolina 27708 USA
8. Department of Plant and Soil Sciences; University of Kentucky; Lexington Kentucky 40526 USA