Ecology is the study of interactions between organisms and their environment. This course is an introduction to core principles, classic experiments, current events, and ongoing research in ecology. It asks: How do organisms survive in nature? Why do they live where they do and not elsewhere? When do they increase in abundance, and when do they decrease? How do they modify their environment, and how do they respond to change? This course is taught at the University of Michigan Biological Field Station (UMBS) in the spring and/or summer terms only.