June 2023: Regent’s Professor Ragan (Ray) Callaway: Global Ecology: Interactions Between Exotic Invaders and Native Ecosystems.

Udo talks with Dr. Callaway, a prominent plant and community ecologist, who for decades researched and taught at the University of Montana. His international research concentrates on the interactions within plant communities and ecosystems. Research in his UM laboratory indicates that when humans introduce some plant species to new regions they force together species with different evolutionary trajectories from different continents, disrupting communities but also providing opportunities to test long held ecological paradigms. Their conversation provides insight into how plants have moved across the globe, resulting in direct and indirect interactions between plants and with other organisms, including resource competition, and interactions with invasive species, as well as soil microbe, herbivore and competitor-mediated interactions. Dr. Calloway shares how other countries deal with invasive plant species and why it is important for a community to have an ecological knowledge base. Ray talks about how his laboratory at UM developed ideas that have been a game changer in the field and ending with some mysteries that remain in the field of global ecology.