1. Department of Chemistry & Biochemistry, Florida International University, Miami, Florida 33199, Southeast Environmental Research Center, Florida International University, Miami, Florida 33199, Science and Ecosystem Support Division, U.S. Environmental Protection Agency, Region 4, Athens, Georgia 30605, Water Management Division, U.S. Environmental Protection Agency, Region 4, Athens, Georgia 30605, and Department of Biological Sciences, Florida International University, Miami, Florida 33199