BIOGRAPHICAL SKETCH Joan Arrington Browder was born 2 September 1937 in Enid, Oklahoma. She is the daughter of Kyle O'Neil Arrington and Syble Wiley Arrington of Amarillo, Texas. She completed high school at Amarillo High School in 1954 and received her first two years of undergraduate work at Amarillo College and West Texas State College in Canyon. She entered the University of Miami, Coral Gables, Florida, in January 1968 and was graduated cum laude in August 1970 with a degree of Bachelor of Science with a major in biology. She entered graduate school at the University of Miami in September 1970 and was granted the degree of Master of Science in biology in January 1973. Graduate work in the Department of Environmental Engineering Sciences at the University of Florida began in January .1973. She has worked toward a PhD since May 1973, while holding a graduate research assistantship with the University of Florida's Center for Wetlands. 406