Dr. Rosie Mangan

Rosie is a Teaching Fellow in Ecology. Her research specialises in sustainable pest and invasive plants management. She researches how pesticide resistance evolves in agricultural pests and develops strategies, using evolutionary genetics, biocontrol, and stakeholder engagement, to predict, prevent, and manage future crop protection failures. Her broader work examines how landscape composition, land-use intensity, and environmental change influence pest dynamics, pollinators, and other beneficial insects. Rosie uses ecological and statistical modelling, including compositional data analysis and Bayesian inference, to understand pesticide use and resistance evolution in agricultural systems.

Rosie completed her PhD in Ecology at University College Dublin, where she focused on the classical biological control of invasive aquatic plants. She has since held research fellowships in Ireland, South Africa, and the UK, working on the biological control of invasive plants, insect pest control in forestry and agriculture, and approaches to support long-term evolutionarily sustainable pest management. At Trinity she teaches biodiversity, conservation biology, and human impacts on biodiversity.