Biology and anthropology of plant invasions - Invasive Plants: Ecological and Agricultural Aspects - page 217

dissemination of information about invasive species in the US are funded by
government agencies in compliance with this order. The terminology used in
this public policy statement reveals how some perceive invasion biology.
Therein [9, 10] they define several terms, below included with definitions from
more conventional sources:

Invasive species 1. An alien species whose introduction does, or is like-

ly to, cause economic or environmental harm or
harm to human health [9].

2. A species that is non-native (or alien) to the ecosys-

tem under consideration and whose introduction
causes or is likely to cause economic or environ-
mental harm or harm human health [10].

Alien species 1. With respect to a particular ecosystem, any species,

including seeds, eggs, spores, or other biological
material capable or propagating that species, that is
not native to that ecosystem [9].

2. Non-native; a species occurring in an area to which

it is not native [8].

Native species 1. With respect to a particular ecosystem, a species

that, other than as a result of an introduction, histor-
ically occurred or currently occurs in an ecosystem
[9].

Native 1. Relating to the indigenous inhabitants of a country

or area, a local Inhabitant, an indigenous plant or
animal [3].

2. Relating or belonging to a person or thing by virtue

of conditions existing at the time of birth; born in
particular place [2].

3. Indigenous, living naturally within a given area, used

of a plant species that occurs at least partly in natu-
ral habitats and is consistently associated with cer-
tain other species in these habitats [8].

Nativism 1. The doctrine of innate ideas.

2. In US, the advocacy of the claim of native as

opposed to that of naturalized Americans [3].

3. Chiefly US the policy of favouring the natives of a

country over the immigrants [2].

Natural 1. Of or produced by nature [3].

2. In accordance with human nature [2].

3. Not affected by man or civilization, uncultivated,

wild [2].

Introduction 1. Intentional or unintentional escape, release, dissemi-

nation, or placement or a species into an ecosystem
as a result of human activity [9].