Rate My Professor Sidney Pierce

Sidney K. “Skip” Pierce is Professor Emeritus in the Department of Integrative Biology at the University of South Florida, where he built a 45-year career dedicated to studying animal cells, culminating in his retirement in 2014. He earned his Ph.D. from Florida State University in 1970. During his tenure, Pierce served as chair of the Department of Biology, contributing to its emergence as a research powerhouse. His primary research focus was the molecular biology and cellular biochemistry underlying the endosymbiosis between sacoglossan sea slugs and chloroplasts stolen from algae, a process termed kleptoplasty. This unique ability enables sea slugs, such as Elysia chlorotica, to harness photosynthesis from algae like Vaucheria litorea, sustaining them through starvation periods of up to nine months under light exposure alone. Pierce's investigations explored how these animals maintain functional chloroplasts, potentially involving gene transfer from algal chloroplasts to the slug cell nucleus, offering insights into genetic engineering for medical applications like cancer treatment. He also examined biochemical mechanisms for cell volume recovery from osmotic stress in marine species and conducted analyses debunking sea monster legends, identifying phenomena like the St. Augustine giant octopus and Bermuda Blob as decayed whale tissue.

Pierce authored over 100 peer-reviewed publications covering diverse organisms and mentored generations of graduate students, many of whom advanced sea slug research globally. His fieldwork spanned the tropical Atlantic and Pacific, where he collected specimens hands-on alongside collaborators like Patrick Joseph Krug over two decades. Pierce's contributions earned widespread recognition, including a TEDxTampaBay presentation, 'The sea slug that eats the sun,' in 2013; features in international media, newspapers, magazines, and the French documentary 'The Power of Plants'; and the University of South Florida Outstanding Faculty Research Award in 2012. In 2023, a new transparent sea slug species from Tampa Bay, Cyerce piercei, was named in his honor, ensuring his legacy endures. His work remains pivotal among the few worldwide experts on animal photosynthesis.