Invasive species are non-native species that can cause harm to the environment, the economy or to human health. Invasives come from all around the world. As international trade increases, so does the rate of invasive species introductions. Invasive species are one of the greatest threats to New York's biodiversity. They cause or contribute to: habitat degradation and loss; the loss of native fish, wildlife and tree species; the loss of recreational opportunities and income; and crop damage and diseases in humans and livestock ( from the New York Dept. of Environmental Conservation).
Common reed can rapidly form dense stands of stems which crowd out or shade native vegetation in inland and estuary wetland areas.
Exotic bush honeysuckle is perhaps the most widespread exotic invasive in the U.S. Widely dispersed by birds, it is now found in at least 38 states.
Areas that have been cleared of swallow-wort should be planted with rapid-growing native species to avoid introduction of other invasive plants.
Currently found in 41 states, this flowering shrub is classed among the top forest invasive plant species for the northeastern area by the US Forest Service.
Garlic mustard is one of very few non-native plants to be able to successfully invade forest understories.
Introduced in the 1860s as an ornamental and for erosion control, Oriental Bittersweet is a vine that smothers plants and uproots trees due to its weight.
Last updated June 3, 2015