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Aliens Among Us: A round table with James H. Brown and Dov F. Sax, Daniel Simberloff, and Mark Sagoff

Ecoinvasion.com: The website for National Book Award finalist Out of Eden: An Odyssey of Ecological Invasion''

City forests in peril: Invasive plants are killing native trees

Hawaiian Ecosystems at Risk project (HEAR)

National Invasive Species Information Center

Pacific Island Ecosystems at Risk project (PIER)

The Nature Conservancy's Global Invasive Species Team

U.S. Coast Guard Ballast Water Management Program

USDA NRCS Plant Materials Program

Alien Plants in Ireland  Database of Alien and invasive plants in Ireland

Invasive alien species in Belgium The Belgian Forum on Invasive Species (BFIS) is an informal structure animated by the Belgian Biodiversity Platform where in scientists interested in biological invasions are involved.

Invasive Species in Ireland project