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National Invasive Species Information Center (NISIC)

The gateway to invasive species information; covering federal, state, local and international sources.
Invasive species are plants, animals, or pathogens that are non-native (or alien) to the ecosystem under consideration, and whose introduction causes or is likely to cause harm.

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Slideshow of Featured Species

  • Water Lettuce

    Grows into dense mats that clog waterways (Ramey 2001)

  • Bighead Carp

    Impacts not adequately known, but may "lead to reductions in populations of native species that rely on plankton for food, including all larval fishes, some adult fishes, and native mussels" (NAS... more

  • Alewife

    Various impacts to native species (CABI)

  • Rusty Crayfish

    Competes with native crayfish species and causes a decline in native species abundance (DiDonato and Lodge 1993)

Featured News and Resources

News

Read the latest invasive species research news from ScienceDaily

What's New

See what's new on NISIC's Web site

Identify

Identify species that may be invasive

Calendar and Events

Find invasive species related conferences and events