Invasive Plants and Animals

What is an invasive species?

National Invasive Species Management Plan, an invasive species is "a species that is non-native to the ecosystem under consideration and whose introduction causes or is likely to cause economic or environmental harm or harm to human health." This definition was adopted by the NYS Invasive Species Task Force. The Task Force refined the definition stating that to be considered "invasive", a non-native species‛ harm must significantly outweigh any benefits.

Hydrilla: an agressive water weed

The newest invasive plant, Hydrilla verticillata, known commonly as 'hydrilla' or 'water thyme,' recently was detected in the Cayuga Inlet, Ithaca.  Hydrilla can grow up to one inch each day. It quickly blocks the light and kills beneficial water weeds. Recreational users of Cayuga Inlet are urged to employ clean boating practices to prevent the further spread of hydrilla and other aquatic invasive species. Remove any plants, mud or debris from boats or equipment that came in contact with water, read more...