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Zebra Mussel Distribution in North America
What this map layer shows: Locations where the zebra mussel, an invasive species of mollusk, has been found in fresh waters.
Background Information
Sample Map Non-native plants, animals, and microbes that have been intentionally or unintentionally introduced into an environment may cause environmental or economic harm or be a threat to human health. When these introduced species do not have enough natural enemies to limit their reproduction and spread they can rapidly expand their range and become invasive species. The spread of invasive species is one of the most serious ecological problems facing our Nation in the 21st century. Aquatic invaders like the zebra mussel are transforming our wetlands and inland waters. They threaten native communities and alter native habitats; they foul beaches, create boating and navigational hazards, and cause millions of dollars of damage to municipal and private facilities relying on fresh water. The zebra mussel has been steadily invading America's rivers and lakes since it was first introduced in Lake St. Clair in 1988. Scientists at the U.S. Geological Survey are documenting the zebra mussel's geographic distribution and studying its behavior and biology. Documenting the geographic distribution of the zebra mussel is just one step toward developing strategies to contain or control its spread. The Zebra Mussel Distribution in North America map layer features the locations of confirmed zebra mussel sightings from 1988 to January 2008. Reports of sightings came from a variety of Federal, State, and municipal agencies, public utilities, universities, engineering firms, and private consultants. Additional information for each sighting includes the year the sighting occurred and a textual description of where the mussel was found (for example, Hudson River at buoy 25, below West Point). Additional information on zebra mussels is available from the USGS Nonindigenous Aquatic Species Site, Zebra Mussel page, and from the USGS Biological Resources Discipline Invasive Species Program.
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Invasive Species: Zebra Mussel Distribution

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Invasive Species - Zebra Mussels

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Invasive Species: Zebra Mussel Distribution


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