One Equation Helps Solve Three Paradoxes in the Spatial Ecology of Predators and Prey

Mark Lewis, University of Victoria Mathematics and Statistics
March 2, 2026 3:00 pm LSK 306

In this talk I will introduce three paradoxes in the spatial ecology of predators and prey. (1) Buffer Zone Paradox: Why do wolves maintain stable buffer zones for prey, even though they may be only saving prey for the neighboring packs? (2) Road Use Paradox: Why are wolves attracted to roads and related linear features, even though that can mean higher chances of dying? (3) Path Less Travelled Paradox: Why do wolves preferentially travel to places they haven’t been recently, even if it means fewer prey? To help solve these paradoxes, I will start with the Fokker-Planck equation, which describes the probability density function for an individual undergoing a random walk. I will then employ a mixture of mathematical approaches including nonlinear advection-diffusion, differential games, first passage time theory and stochastic processes. All of the resulting models will be fit to data before drawing scientific conclusions.

Refreshments will be served preceding the talk, beginning at 2:45.
This talk is being jointly hosted with the UBC Math-Bio group, as part of a full-day colloquium:

Please join us for the Math-Bio/IAM Colloquium on Monday, March 2, featuring a keynote by Dr. Mark Lewis (University of Victoria) as well as talks by faculty, postdoctoral fellows and graduate students from Mathematics and Zoology.
 
Coffee and snacks will be served in the morning, followed by lunch at noon!
 
Date: Monday, March 2, 2026
Time: 9:00 AM – 4:00 PM
Location: ESB 4133 & LSK 306 (IAM Lounge)
 
Please register via the link below by February 23 to help us get an accurate headcount for food:
 
 
Schedule:
 
  • 9:00 AM – 10:00 AM: Welcome Coffee and Snacks (ESB 4133)
  • 10:00 AM – 10:30 AM: Chadi Saad-Roy, UBC Mathematics Assistant Professor (ESB 4133)
  • 10:30 AM – 11:00 AM: Laurinne Balstad, UBC Zoology Postdoctoral Fellow (ESB 4133)
  • 11:00 AM – 11:30 AM: Sharvaj Kubal, UBC Mathematics PhD Student (ESB 4133)
  • 11:30 AM – 12:00 PM: Alireza G. Tafreshi, UBC Zoology Postdoctoral Fellow (ESB 4133)
  • 12:00 PM – 1:30 PM: Lunch (ESB 4133)
  • 1:30 PM – 2:20 PM: Break
  • 2:20 PM – 3:00 PM: Meet and greet at the IAM Lounge (LSK 306)
  • 3:00 PM: Keynote Talk by Dr. Mark Lewis (LSK306)