Invasive species in the United States

Invasive species are a crucial threat to many native habitats and species of the United States and a significant cost to agriculture, forestry, and recreation. An invasive species refers to an organism that is not native to a specific region and poses significant economic and environmental threats to its new habitat. The term "invasive species" can also refer to feral species or introduced diseases. Some introduced species, such as the dandelion, do not cause significant economic or ecologic damage and are not widely considered as invasive. Economic damages associated with invasive species' effects and control costs are estimated at $120 billion per year.

The main geomorphological impacts of invasive plants include bioconstruction and bioprotection.

Degrees of ecological impacts by introduced faunas that can potentially compensate for extinct native animals (especially megafauna) and treatments of these animals have long been subjects to discussions most notably mustangs and burros, while contributions by other species to the native ecosystems are also debatable.