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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. Learn what determines if a species is invasive.

Slideshow of Featured Species

  • Diffuse Knapweed

    Reduces agricultural yields and forage values; crowds out native species (Winston et al. 2012)

  • Grass Carp

    Direct and indirect impacts via: competition for food; significant changes in the composition of macrophyte, phytoplankton, and invertebrate communities; interference with the reproduction of other... more

  • Garlic Mustard

    Crowds out native species (Munger 2001)

  • Round Goby

    Competes with and preys on native species (NAS Database)

Featured

Climate Change

Learn how climate change impacts invasives species

What's New

See what's new on NISIC's Web site

News

Read the latest invasive species research news from ScienceDaily

Calendar and Events

Find invasive species related conferences and events