Today there is no place on Earth that does not harbour invasive exotic species. Invasive plants and animals can be found on every continent, including Antarctica, and within all waterbodies, including all oceans. In our increasingly connected world, with speedy commercial and recreational travel and the global movement of biological matter for food, invasive species are showing up at such a fast rate that there is no way to accurately count how many currently exist or how many are likely to emerge in the coming decades. Monitoring these species and controlling their spread is essential, as we increasingly understand the negative impacts they pose: their threat to our health; the toll they take on our commercial production; and the threat they pose to native ecosystems. This Very Short Introduction provides a clear definition of an invasive species, and considers the myriad ways they are moved around the globe, and the ecological, social, and economic impacts they often impose. Exploring the way Earth's biodiversity is being affected by global change, Julie Lockwood also discusses policy and management approaches to combating the ill-effects of invasive species, and how invasive species fit within the broader context of environmental change. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable. List of illustrations 1. What is an invasive species? 2. Invasion pathways 3. Establishment 4. Spread 5. Ecological impact 6. Socio-economic impact 7. Policy and management 8. Future of invasion science Future reading Index Dr Julie Lockwood explores the fate of Earth's biodiversity in the wake of global change. Humans dominate current ecological and evolutionary processes to a great extent. As a consequence, a growing list of species are lost to extinction, while another set of species ride the wave of globalization as invasive species. Dr Lockwood and her research group document and explore the societal implications of this transformation of global biodiversity. A native of Atlanta, Georgia, Dr Lockwood was trained as a conservation biologist at the University of Tennessee and now is Professor of Ecology, Evolution and Natural Resources at Rutgers University.