Dr. Rockwell is a population ecologist working on the dynamics of interacting species in the Hudson Bay Lowlands. While the main theme of his 43 year long-term field project has centered on lesser snow geese, work has expanded to include graminoid primary producers, various non-goose herbivores (e.g. caribou) and predators including arctic foxes, wolves and both grizzly and, especially, polar bears. One focus of his current research is the impact of global climate change on the interactions of species in these three trophic levels. The other involves the genetic analyses of non-invasively sampled tissues to evaluate abundance, survival, population structure and landscape use of apex predators such as polar bears. He and his students and colleagues integrate field approaches, laboratory assessments and state-of-the-art analytical and modeling techniques. They are all members of the Hudson Bay Project, an international team dedicated to research in remote, coastal arctic tundra.