Invasive species are exotic species (not native to the ecosystem) whose introduction does or will likely cause economic or environmental harm or harm to human health. Invasive species can include insects, exotic wildlife or feral animals, fungi and diseases, and plants. In addition to displacing native species and disrupting natural cycles in the environment, they can prevent landowners from meeting their management objectives and reduce income from agricultural products.
Every day, invasive species are threatening the health of our nation’s vital agricultural and natural lands. Forests and rangelands are being infested, cropland production is being negatively impacted, streams and waterways are being choked with weeds, and wildlife species are losing habitat. These conditions are just a few of the negative impacts that will continue, or will become more severe, if successful actions are not taken to halt and/or reverse this trend.
National Invasive Species Information Center (NISIC): Gateway to invasive species information; covering Federal, State, local, and international sources. Invasive species are plants, animals, or pathogens that are non-native (or alien) to the ecosystem under consideration and whose introduction causes or is likely to cause harm.