Evolution of Invasive Populations

Abstract

Evolutionary mechanisms that operate at multiple stages of invasions (e.g., transport, introduction, establishment) could profoundly affect the invasive success of populations. Evolution within the native range shapes the intrinsic properties of populations (e.g., plasticity, evolvability) in a manner that would dictate their response to novel environments. Confronted with a sudden introduction into a novel range, a rapid evolutionary response is often essential for survival. Continued selection might be necessary following establishment, as traits that are benefi cial during early stages of colonization would often differ from those that favor continued range expansion or long-term persistence. While much progress has been made in characterizing the process of evolution during invasions, more study is needed to understand the evolutionary forces that lead to populations with a greater propensity to invade.