This monograph provides information on the global impact of alien species across Canadian landscapes. Alien invasive species are recognized as a major global threat to biodiversity. The problems are exacerbated by the globalization of trade and the inability of current inspection and quarantine regimes to cope with an increasing demand. No comprehensive overview exists of the alien invasive species issue in Canada. Alien Invaders in Canada's Waters, Wetlands and Forests aims to bridge this gap. It is a collection of papers from experts in several disciplines who discuss and analyze invasive species from a variety of perspectives: invasion pathways, affected sectors, management and control, and national and international collaborations.