[:en]Joelisoa Ratsirarson is a Professor of Ecology and Biodiversity at the Forestry Department of the School of Agronomy (ESSA) of the University of Antananarivo, Madagascar. He is the Board Chair of the Tany Meva Foundation and former Vice President of the University. His research interest is mainly focused an biodiversity conservation and monitoring, including conservation policy and governance. He is also studying the impact of environmental change, including climate change and deforestation on biodiversity resilience in Madagascar, especially in the southwest such as Bezà Mahafaly. He has worked on the population dynamics of rare, endangered and invasive species, mainly in Madagascar.[:fr]Joelisoa Ratsirarson est un Professeur au sein du Département des Eaux et Forêts de l’Ecole Supérieure des Sciences Agronomiques de l’Université d’Antananarivo, Madagascar. Ses recherches se focalisent surtout à la conservation de la biodiversité, y compris la politique et la gouvernance de la conservation ainsi que l’impact du changement de l’environnement, entre autres le changement climatique et la déforestation sur la résilience de la biodiversité à Beza Mahafaly. Il travaille également sur la dynamique des populations des espèces rares, menacées et envahissantes, principalement à Madagascar.[:]