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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

  • Whitetop

    Crowds out native species and reduces crop yields (Zouhar 2004)

  • Didymo

    Alters stream ecology by forming dense algal blooms that can cover up to 100 percent of stream bottoms (Spaulding and Elwell 2007)

  • Oxygen Weed

    Has invaded New Zealand and Europe. It can inhabit freshwater lakes, dams and slow moving streams. Forms dense mats that block sunlight, thereby killing native aquatic plant and animal species, which... more

  • Tropical Bont Tick

    Spreads fatal livestock and wildlife diseases. It infests cattle, sheep and goats, reducing meat and milk production on the islands. (CFSPH 2009)

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