Invasive Species Northern Ireland

Vine-like fern

Lygodium japonicum

Status:

Potential

Habitat:

Terrestrial

Threats:

Outcompetes native species.

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Virile crayfish

Orconectes virilis

Status:

Potential

Habitat:

Freshwater

Threats:

Predation of native species leading to disruption of habitats

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Water hyacinth

Eichhornia crassipes

Status:

Potential

Habitat:

Freshwater

Threats:

Likely to have a significant adverse impact on biodiversity or the related ecosystem services

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Water lettuce

Pistia stratiotes

Status:

Potential

Habitat:

Freshwater

Threats:

Alters habitats. Creates single species matts. Crowds out native species.

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Water primrose

Ludwigia grandiflora

Status:

Potential

Habitat:

Freshwater

Threats:

Choke waterways and competing with native species

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Western Mosquitofish

Gambusia affinis

Status:

Potential

Habitat:

Freshwater

Threats:

Attacks native fish species, consumes the eggs of commercially important fish, potential to transmit parasites to native fish

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White perch

Morone americana

Status:

Potential

Habitat:

Brackish

Threats:

Outcompetes native fish and consumes their eggs. Hybridises with other fish, altering and polluting the native gene pool.

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Whitetop weed

Parthenium hysterophorus

Status:

Potential

Habitat:

Terrestrial

Threats:

Competes with native species

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Wild boar and hybrids

Sus scrofa

Status:

Potential

Habitat:

Terrestrial

Threats:

Habitat alteration. negative impacts on native flora and fauna.

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