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Nonindigenous Aquatic Species (NAS)

The Nonindigenous Aquatic Species (NAS) information resource for the United States Geological Survey (USGS), located at the Center for Aquatic Resource Studies, has been established as a central repository for accurate and spatially referenced biogeographic accounts of nonindigenous aquatic species. Through the site you can obtain information, maps, or search the NAS database for information about different nonindigenous aquatic species.

Invasive Species

Each year numerous plant and animal species disperse from their natural range to new locations around the world. Many of these non-native, exotic species have colonized the southeastern United States and become invasive, displacing native plant and animal ecological communities. The consequences of these invasions may be localized or widespread and impacts can range from minor to severe. Invasive species compete with native species, alter ecosystems, and may bring disease not only to native flora and fauna but to humans as well.

The diverse habitats of the southeastern U.S. provide favorable conditions for many invasive animals, microorganisms, and plants. More information about each group of invasive species is presented below.

Thumbnail image of feral hogs (Sus scrofa) [Image: National Aeronautics and Space Adminstration Invasive Animals
The southeastern U.S. is home to a wide variety of invasive animals, including invasive amphibians like the Cuban treefrog, birds including the common pigeon, fishes like the northern snakehead, invertebrates such as the zebra mussel, and mammals like the wild boar.
Thumbnail image of Avian Influenza Virus under Magnification. [Image modified from U.S. Centers for Disease Control and Prevention photo by Cynthia Goldsmith, Jacqueline Katz, and Sherif R. Zaki] Invasive Microorganisms and Pathogens
Plant and animal diseases are often devastating when introduced outside their natural range. Invasive bacteria include the pathogen responsible for butternut canker, while invasive viruses include Highly Pathogenic Avian Influenza. Invasive fungi such as Chestnut blight and Dutch elm disease are examples of invasive pathogens originating overseas that decimated native trees in the southeastern U.S.
Thumbnail image of Kudzu (Pueraria montana var. lobata).   [Image modified from NBII Library of Images from the Environment photo by John J. Mosesso] Invasive Plants
Invasive plants include all invasive photosynthetic organisms, from algae and other phytoplankton, to aquatic plants, ferns, herbs and vines, grasses, and trees and shrubs.
Invasive species management.  [Image: U.S. National Park Service] Invasive Species Management Tools
Invasive species management in the southeastern U.S. requires a full arsenal of tools, both physical and virtual. In addition to tools used in the field, many Web-based tools are available including identification guides, training materials, map layers, and other resources.

Regional, National, and International Invasive Species Resources

Southeast Exotic Pest Plant Council (SE-EPPC)

SE-EPPC is an umbrella organization for state chapters in Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, and Tennessee.
NBII Invasive Species Information Node (ISIN)

Global Invasive Species Information Network (GISIN)

The NBII Program is administered by the Biological Informatics Program of the U.S. Geological Survey
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