Fortunately, it appears Alaska has been spared from extensive invasion by exotics. Alien or exotic species are considered to be any organism that enters an ecosystem beyond its historic range, whether it travels from another ecosystem within the region or state, or from an entirely different part of the world. Often, aliens have positively contributed to the environment through agriculture, horticulture, landscaping and soil stabilization. But, sometimes, the alien species spread so quickly and rapidly, out competing indigenous species, due to a lack of natural predators or other controls. These invasive exotics can seriously and permanently impact an areas biodiversity and vitality.
Disturbed sites are most vulnerable, but aggressive species can invade intact ecosystems.
Long term risks include higher crop and livestock production costs, loss of native plants, degradation of wetlands and loss of wildlife habitat. Prevention should be emphasized, for removal is expensive and may be impossible. The purchase of weed free products can help prevent the spread, as can minimizing vehicle traffic in the area. Items that may have come into contact with seeds should be thoroughly cleaned and inspected before leaving. If new species are spotted, several questions should be answered.