1. Center for the Environmental Implications of Nanotechnology (CEINT), Duke University, Durham, North Carolina 27708, United States
2. Biology Department, Duke University, Durham, North Carolina 27708, United States
3. Nicholas School of the Environment, Duke University, Durham, North Carolina 27708, United States
4. Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15289, United States
5. Géosciences Environnement Toulouse, CNRS, Toulouse University, CNES, IRD, UPS, 31400 Toulouse, France
6. Department of Biology, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, Texas 76706, United States
7. U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri 65201, United States
8. Univ Angers, Institut Agro, INRAE, IRHS, SFR QUASAV, F-49000 Angers, France