Exotic Species and Biodiversity

How do introductions of exotic species affect patterns of biological diversity across a range of spatial scales from local sites to the entire planet? Introductions of exotic species are large scale manipulations of ecosystems that can be studied as unreplicated and uncontrolled experiments. What insight can they provide about ecology, evolution and biogeography? This last question serves as the basis of a new book, Species Invasions: Insights into Ecology, Evolution, and Biogeography.