Rosanna Maria Stefania Costa obtained her graduate level education in “Natural Sciences: Conservation of Nature and its resources” cum laude, and her PhD degree in Environmental Science (Phytogeography Mediterranean territories) from the University of Catania, Italy, and her II level Master's in Landscape Ecology and Environmental Planning from the Sapienza University of Rome, Italy.
From 2007 to 2009, she was Special Professor of Applied Systematic Botany and Phytogeography for the degree in Landscape and Garden Architecture in the Faculty of Architecture at the Mediterranean University of Reggio Calabria, Italy. She was also Special Professor of Botany Science at the University of Catania and, since 2004, she has carried out continuous and coordinated collaboration for activities to assist the teaching of botany for the CDL of Biological Sciences at the University of Catania.
Currently, she is employed by the Department of Biological, Geological and Environmental Sciences at the University of Catania as a Research Fellow on the study and typification of the pre-Linnaean herbaria. She collaborates with other universities in Italy and abroad. She contributes to geobotanical, ecological and landscape research in Sicily and southern Italy. Of particular interest to her is the knowledge and conservation of the naturalistic and cultural heritage of Sicily and historical gardens, botanical gardens and herbaria. Her publications include research articles in national and international research journals.