Hierarchy classification:

1. top of the aat hierarchies
2. Agents Facet
3. Living Organisms (hierarchy name)
4. living organisms (entities)
5. [organisms by condition]

Anotations

Scope note:

Living organisms that are not unique to a geographic location, having been introduced intentionally or unintentionally to habitats other than their own, often with harmful or invasive impact to an environment.