INNS strategy and action plan
What are invasive species –
- An invasive species is an animal or plant outside their normal range which has a negative impact on native organisms or the environment.
- Non native species are species that are found outside their normal range however they pose no threat.
What impact do invasive species have in the Northeast –
- Invasive species can alter habitats and outcompete native animals for food and resources.
- A particular species of concern in Northumberland is the endangered white clawed crayfish (WCC). The population is in decline due to the invasive American Signal Crayfish (ASC) which outcompetes WCC and is a carrier of the crayfish plague.
- Aquatic alien invasive plants in Northumberland such as the Australian Swamp stonecrop, Canadian pondweed, Water fern and Floating pennywort can reduce the biodiversity of ponds by blanketing out other species.
- Giant hogweed and Japanese knotweed across the Tweed, have been an invasive species of concern as well as Himalayan balsam within the Till catchment area.
- Within the Tyne, American mink are an invasive species of concern due to their negative impact on the native Water vole populations within the area.