Invasive plants have a significant economic impact on municipalities, landowners and natural areas. In Vermont, for example, the Eurasian water-milfoil decreased property values by 16.4%. In Manitoba, the leafy spurge reduced land values by $30 million over the course of a year, as it infests 340,000 acres of land and rights of way. The species costs the province approximately $865 per hectare.
Invasive species usually lack natural predators, and their introduction into a new ecosystem has weakened their natural defenses. These plants outcompete native species for resources, and lack natural enemies in the new habitat. For example, the red seaweed Gracilaria vermiculophylla, native to the northwest Pacific region of East Asia, arrived in North America from Europe via shipments of oysters, ship ballast water and boat propellers.
Invasive species also pose a significant risk to the environment. They not only affect the local economy but also threaten human health and ecosystems. They can take decades to disappear, and finding solutions can be difficult. Once established, invasive species may be difficult to control and can be very costly. By understanding the causes and effects of invasive species, we can better prevent them. If you are a citizen of a specific area, it is in your best interest to take measures to eliminate them.
Invasive species are alien species that have been introduced into a different ecosystem and negatively impact its native inhabitants. They can cause allergies, outcompete native species for resources, and even threaten the economy. Moreover, they can be extremely disruptive to ecosystems, which is why environmental agencies and other stakeholders are working to eradicate them. For example, the invasive zebra mussel, which has the capacity to double in 12 days, can clog up ship docks.