Michelle Audie¹, Paul M Mayer², J Renee Brooks², Dorothy Merritts³, Robert C. Walter³ and James H. Power⁴, (1)Philadelphia, PA, United States, (2)U.S. Environmental Protection Agency Corvallis, Western Ecology Division, Ecological Effects Branch, Corvallis, OR, United States, (3)Franklin and Marshall College, Department of Earth and Environment, and The Water Science Institute, Lancaster, PA, United States, (4)United States Environmental Protection Agency, Western Ecology Division Ecological Effects Branch, Corvallis, OR, United States