Definitions courtesy of the National Invasive Species Information Center website (www.invasivespeciesinfo.gov) Laws and Regulations - Executive Order 13112 and the National Park Services.

Alien Species - with respect to a particular ecosystem, any species, including
    its seeds, eggs, spores, or other biological material capable of propagating
    that species, that is not native to the ecosystem.

Control - as appropriate, eradicating, suppressing, reducing, or managing invasive
    species populations, preventing spread of invasive species from areas where they
    are present, and taking steps such as restoration of native species and habitats to
    reduce the effects of invasive species and to prevent further invasions.

Ecosystem - the complex of a community of organisms and its environment.

Exotic - those that occur in a given place as a result of direct or indirect, deliberate, or
    accidental by humans.

Invasive Species - an alien species whose introduction does or is likely to cause
    economic or environmental harm or harm to human health.

Introduction - the intentional or unintentional escape, release, dissemination, or
    placement of a species into an ecosystem as a result of human activity.

Native Species - with respect to a particular ecosystem, a species that, other than as
    a result of introduction, historically occurred or currently occurs in that ecosystem.

Species - a group of organisms all of which have a high degree of physical and
    genetic similarity, generally interbreed only among themselves, and show
    persistent differences from members of allied groups of organisms.

Stakeholders - (not limited to) State, tribal, and local government agencies, academic     institutions, the scientific community, nongovernmental entities including
    environmental, agricultural, and conservation organizations, trade groups, commercial     interests, and private landowners

Up