Full funding is available for a four-year PhD position in the labs of Drs. Andrew MacDougall and Kevin McCann – University of Guelph, Guelph, Ontario, Canada. We seek a highly motivated candidate with a theoretical or empirical background at the MSc or undergraduate level, to explore issues of global change biology, stability and ecological “tipping points”, plant biogeography, and/or the regulation of biological diversity in global grasslands. This project is affiliated with Nutrient Network, based at the University of Minnesota USA (www.nutnet.org), and the University of Washington (Dr. Jon Bakker). The work centers on testing major drivers of diversity and stability along latitudinal gradients from desert to arctic in North America. Project emphasis can be theoretical or empirical depending on interest, but there will likely be a need for fieldwork in remote amazing wilderness of western North America. If interested, please e-mail a brief statement of research interest, your CV, an unofficial transcript, and the names of two academic referees to firstname.lastname@example.org. Start time is flexible up to and including fall 2023.