1. Duke University Wetlands Center Field Station, 16139 Okeechobee Boulevard, Loxahatchee, Florida 33470, Wetlands Center, School of the Environment, Duke University, Durham, North Carolina 27706, Drinking Water Research Institute, Florida International University, Miami, Florida 33199, and U.S. Environmental Protection Agency, 1 Sabine Island Drive, Gulf Breeze, Florida 32561