Invasive Species

Invasive species, also called invasive exotics or simply exotics, is a nomenclature term and categorization phrase used for flora and fauna, and for specific restoration-preservation processes in native habitats, with several definitions.

  • The first definition, the most used, applies to introduced species (also called "non-indigenous" or "non-native") that adversely affect the habitats and bioregions they invade economically, environmentally, and/or ecologically. Such invasive species may be either plants or animals and may disrupt by dominating a region, wilderness areas, particular habitats, or wildland-urban interface land from loss of natural controls (such as predators or herbivores). This includes non-native invasive plant species labeled as exotic pest plants and invasive exotics growing in native plant communities. It has been used in this sense by government organizations as well as conservation groups such as the International Union for Conservation of Nature (IUCN) and the California Native Plant Society. The European Union defines "Invasive Alien Species" as those that are, firstly, outside their natural distribution area, and secondly, threaten biological diversity. It is also used by land managers, botanists, researchers, horticulturalists, conservationists, and the public for noxious weeds. The kudzu vine (Pueraria lobata), Andean Pampas grass (Cortaderia jubata), and yellow starthistle (Centaurea solstitialis) are examples.
  • The second definition includes the first, but broadens the boundaries to include indigenous or native species, with the non-native ones, that disrupt by a dominant colonization of a particular habitat or wildlands area from loss of natural controls (i.e.: predators or herbivores). Deer are an example, considered to be overpopulating their native zones and adjacent suburban gardens, by some in the Northeastern and Pacific Coast regions of the United States.
  • The third definition identifies invasive species as a widespread nonindigenous species. This one can be too broad, as not every nonindigenous or "introduced" species has an adverse effect on a nonindigenous environment. A nonadverse example is the common goldfish (Carassius auratus), though common outside its native range globally, it is rarely in harmful densities to a native habitat.

Because of the variability of its definition, and because definitions are often from a socioeconomic perspective, the phrase invasive species is often criticized as an imprecise term for the scientific field of ecology. This article concerns the first two definitions; for the third, see Introduced species.

Read more about Invasive Species:  Conditions That Lead To Invasion, Biogeographic Evaluation

Other articles related to "invasive species, species, invasive":

South Atlantic Invasive Species Project
... The South Atlantic Invasive Species Project is a three year project (December 2006 - December 2009) funded under the European Union EDF 9 ... Atlantic Overseas Territories to deal with invasive species issues ...
Invasive Species - Biogeographic Evaluation
... the ambiguous, subjective, and pejorative vocabulary that so often accompanies discussion of invasive species even in scientific papers, Colautti and ... The model evaluated individual populations rather than entire species ... This model applied equally to indigenous and to introduced species, and did not automatically categorize successful introductions as harmful ...
Ship Or Vessel - Ship Pollution - Ballast Water
... Meinesz believes that one of the worst cases of a single invasive species causing harm to an ecosystem can be attributed to a seemingly harmless jellyfish ... Mnemiopsis leidyi, a species of comb jellyfish that inhabits estuaries from the United States to the Vald├ęs peninsula in Argentina along the Atlantic coast, has ... Invasive species can take over once occupied areas, facilitate the spread of new diseases, introduce new genetic material, alter landscapes and jeopardize ...
Little Tom Mountain - Invasive Species
... survey included some effort to determine the status of invasive plant species in our properties ... The following plant species list was compiled Asiatic bittersweet Autumn olive Black locust Climbing nightshade Glossy buckthorn Japanese barberry Common barberry Japanese honeysuckle Morrow ...
Lonicera Maackii - Cultivation and Uses - As An Invasive Species
... in some areas of the United States due to its well documented invasive character ... It is listed as a "invasive, banned" species in Connecticut, "prohibited" in Massachusetts, and a "Class B noxious weed" in Vermont ... It is also officially listed as an invasive species by government agencies in Wisconsin and Tennessee ...

Famous quotes containing the words species and/or invasive:

    Not only does every animal live at the expense of some other animal or plant, but the very plants are at war.... The individuals of a species are like the crew of a foundered ship, and none but good swimmers have a chance of reaching the land.
    Thomas Henry Huxley (1825–95)

    The frequency of personal questions grows in direct proportion to your increasing girth. . . . No one would ask a man such a personally invasive question as “Is your wife having natural childbirth or is she planning to be knocked out?” But someone might ask that of you. No matter how much you wish for privacy, your pregnancy is a public event to which everyone feels invited.
    Jean Marzollo (20th century)