This book explores ecological hypotheses in the context of invasive species establishment and spread. It also examines the physiological basis for invasive species success. The book offers insights into the ecological economics of plant invasions, the costs and benefits of managing invasive plants for recreational use in natural areas, bio-economic models to simulate the impacts of invasive plants on economic value, the economic impact of invasive plants used in the horticulture industry in North America, and policy intervention mechanisms.