The distinction has long been widely recognized by invasion scientists and policymakers. It was codified in United Nations’ 1992 Convention on Biological Diversity, which engages 194 signatory nations to “Prevent the introduction of, control or eradicate those alien species which threaten ecosystems, habitats or species” (emphasis added). A preeminent authority on biodiversity conservation, the International Union for the Conservation of Nature, defines an invasive species as one “that has been introduced to an environment where it is non-native, or alien, and whose introduction causes environmental or economic damage or harm to human health.”
@rlwalls2008 Will need PCO support here, but very interesting:
http://www.islandconservation.org/invasive-species-are-by-definition-harmful/