Invasive species wreak havoc on North America's ecosystems and economy

North America faces a growing threat from invasive species, non-native plants and animals that harm ecosystems, economies and human health. These organisms, often introduced by human activity, spread rapidly and disrupt delicate environmental balances.

Some of the most damaging include Asian carp, zebra mussels, and kudzu—each causing widespread ecological and economic problems across the continent.

The emerald ash borer, a beetle from Asia, was first detected in North America in 2002. Since then, it has destroyed millions of ash trees in the U.S. and Canada, leaving forests and urban areas with fewer mature trees.

Zebra mussels, brought from Eastern Europe, now clog water pipes and damage infrastructure in lakes and rivers. Their rapid spread alters aquatic ecosystems, costing millions in maintenance and repairs.

In the southern U.S., nutria—large rodents from South America—have multiplied, eroding wetlands and damaging water control systems. Their burrowing weakens levees and disrupts natural habitats.

Kudzu, once planted for erosion control, now smothers native plants across the South. Nicknamed 'the vine that ate the South,' it grows uncontrollably, reducing biodiversity and altering landscapes.

The European starling, introduced in the 19th century, has thrived, pushing out native birds and damaging crops. Farmers also struggle with the brown marmorated stink bug, an East Asian pest that ruins fruits, vegetables, and field crops.

Asian carp, originally imported to clean aquaculture tanks, now threaten native fish in rivers and lakes. Their rapid reproduction and aggressive feeding habits disrupt food chains and harm fishing industries.

In the U.S., federal agencies like the U.S. Fish and Wildlife Service and the National Park Service lead efforts to control these species. State wildlife departments also work on prevention, regulation, and eradication through partnerships like the National Invasive Species Council.

Invasive species continue to spread, costing governments, businesses, and landowners billions in damages each year. Without stronger prevention and control measures, their impact on North America's ecosystems and economy will likely worsen. Agencies and researchers stress the need for coordinated action to limit further harm.