Ecological and economic impacts
Ecological impacts
Competition with native species.
Predation on native organisms.
Introduction or transmission of pathogens.
Changes in fire regimes and nutrient cycling.
Alteration of habitats and food webs.
Reduction in native biodiversity.
Economic and social impacts
Agricultural losses.
Blocked irrigation channels and waterways.
Increased costs of control and restoration.
Damage to fisheries, grazing lands and ecosystem services.
Health impacts, including allergies from some invasive weeds.