Concordia University in Montreal, Canada, is offering a funded PhD position in Community Ecology and Biogeography, supervised by Professor Jean-Philippe Lessard, founder of the Community Ecology and Biogeography Lab. The research group investigates the forces enabling the maintenance and governing the distribution of biological diversity, with a focus on how biodiversity will change in the face of global changes. The lab combines theoretical and empirical work, with field-based projects focusing on insects (ants, dragonflies, bees) and their roles in ecosystems. Research topics include the ecological and evolutionary determinants of range limits and dynamics in the context of environmental changes, rules governing the assembly of ecological networks (such as plant-pollinator, plant-microbial, and host-parasite networks), and the role of ants and other soil arthropods in nutrient cycling and carbon storage. The position is ideal for candidates with a strong background in ecology, biogeography, or evolutionary biology, and who are proficient in R or similar scientific programming languages for data analysis and modeling. Experience with large datasets, strong analytical/quantitative skills, and fieldwork in ecological or biodiversity studies are assets. Additional desirable skills include ecological modeling, spatial analysis (GIS), mathematical skills relevant to quantitative ecology, knowledge of insect physiology, metabolism, or biochemistry, and scientific publishing experience. The position is funded, with stipend and TA/RA opportunities available. The application deadline is January 8, 2026, and the start date is August 2026. Applicants should send a single PDF including a cover letter, CV, unofficial transcripts, names and contact information of two referees, publications, and any other relevant documents to [email protected]. The lab encourages applications from diverse backgrounds and welcomes students from the global south and the LGBTQ+ community. For more information, visit the provided links or contact Alisa Makusheva directly.