Carrickfergus Borough Council - Invasive Species

Environment Menu

Invasive Species

Non-native species are those that have been introduced, either intentionally or unintentionally, outside their natural range. Many of these non-native species live in harmony with our native species causing no adverse impacts. However a few non-native species have become known as 'invasive' as they thrive in our habitats and out-compete our native flora and fauna.

Over the last century increasing travel and trade have allowed many species to overcome the geographical barriers that had previously restricted them.

Non-native invasive species are also known as invasive alien species. They are widely recognised as one of the biggest threats to our native biodiversity, second only to that caused by habitat destruction. They not only have negative environmental impacts, but they can also adversely impact on recreational activities such as walking, boating, fishing, swimming and various other water-based leisure pursuits.

They can also have serious associated economic costs. Once an invasive species has established within a habitat it can spread rapidly, out-competing native species. The spread of most invasive plant species is by plant fragments or seed. Invertebrates or mammals can move independently within aquatic or terrestrial habitats or hitch rides on the hulls of boats or on equipment.

Northern Ireland has been subject to the impacts of many invasive alien species. Within a relatively short time-scale we have already witnessed the establishment of species which are currently having a detrimental effect upon our local biodiversity.

This is what you can do to help minimise the chance of alien invaders establishing in our community:

• Take a look at the 'Field Guide to Invasive Species in Ireland'. This provides information and photographs of the species we should be concerned about.
• If you find any of these species don't touch them or move them to another place.
• Take care to ensure you don't accidentally move them on any gardens tools or boating / fishing equipment.
• Consider using hot water to clean any equipment used in gardens, oceans, lakes, ponds, rivers and streams before using elsewhere.
• Don't transfer water or soil from one place to another because this could contain seeds or spores of alien invaders.
• When disposing of plant or animal material make sure it is in sealed containers if you suspect it could be contaminated with alien species.
• Report sightings of the species on www.invasivespeciesireland.com in the 'Alienwatch' section. This project aims to keep track of where invasive species are living.