Invasive Species

Invasive species (plants and animals) are those that have been introduced from outside of their native range and have the potential to negatively impact humans, animals and/or ecosystems.  Not all introduced species are considered invasive or harmful, though some can have a lag period before they become a threat.

Invasive species have the ability to establish quickly in new areas and spread rapidly.  Invasive species are also known as alien, exotic weeds, introduced, and non-indigenous.  Another term often used for invasive plants, noxious weeds, has traditionally included plants harmful to livestock (though currently expanded to include animals in general) or people.  Noxious weed is also a term for legally designated species within provincial legislation (Weed Control Act).