As global travel and trade increase and the global climate changes, the dispersal of species from their [Page 422]natural range into new areas is bound to increase, increasing the likelihood that species will become invasive, often with unexpected consequences. Effective communication with diverse stakeholders is essential for reaching a shared understanding of the perceived costs and benefits of invasive species to the environment, the economy, and society and to inform decisions that prioritize actions and resources to manage the risks posed. This entry considers the traits that make species invasive, the risks invasive species pose, methods for their assessment and management, and the important role of communication throughout the risk management cycle. Stakeholders must work together to address invasive species issues, and understanding risk perception ...