Sussex Invasive Alien Species Report

Invasive non-native plant and animal species are the second greatest threat to biodiversity worldwide (after habitat destruction). They can negatively impact on native species, can transform habitats and threaten whole ecosystems causing serious problems to the environment and the economy.” —GB Non-native Species Secretariat

With guidance from Sussex’s leading naturalists we have compiled a list of invasive alien species which occur in Sussex; this will enable us to produce Sussex Invasive Alien Site Reports in order to help minimise the threat posed by invasive alien species in Sussex.

49 species have been selected for inclusion in the SIASR. View the full list.

An invasive alien is defined as an alien species whose introduction and/or spread threatens biological diversity. Invasive alien species are referred to by several names, which are often used interchangeably: non-natives, introduced, non-indigenous, exotic, foreign, noxious species, aggressive species, pest species, harmful species and so on. With no natural predators and a benign climate, invasive alien species can out-compete our native flora and fauna thus contributing to the decline or extinction of local populations or even entire species. Revision of legislation (Part I of the Wildlife and Countryside Act) amends the list of possible species that are illegal to allow to escape, as well as a ‘power of restoration order’ that would force those who allow species to escape to pay for getting rid of them.

Further details on non-native species legislation can be found on the GB Non-native Species Secritariat website and the Defra website.

Back to Species Inventories page.