USGS Biology - Invasive Species Program

America is under siege by many harmful non-native species of plants, animals, and microorganisms. More than 6,500 nonindigenous species are now established in the United States, posing risks to native species, valued ecosystems, and human and wildlife health. These invaders extract a huge cost. The current annual environmental, economic, and health-related costs of invasive species exceed those of all other natural disasters combined. USGS plays... more
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