Invasive Species Northern Ireland

Ruffe

Gymnocephalus cernuus

Status:

Potential

Habitat:

Freshwater

Threats:

Negative impacts on native fish communities.

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Rusty Crayfish

Faxonius rusticus

Status:

Potential

Habitat:

Freshwater

Threats:

Outcompete native crayfish for food and resources, reduce aquatic vegetation cover

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Salvinia moss

Salvinia molesta

Status:

Potential

Habitat:

Freshwater

Threats:

Grows rapidly. Spreads vegetatively. May smother out other plants.

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Senegal tea plant

Gymnocoronis spilanthoides

Status:

Potential

Habitat:

Freshwater

Threats:

Fast growing. Pioneer species. Highly adaptable to new environments.

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Spiny-cheek crayfish

Orconectes limosus

Status:

Potential

Habitat:

Freshwater

Threats:

Threat to the native European crayfish

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Topmouth gudgeon

Pseudorasbora parva

Status:

Potential

Habitat:

Freshwater

Threats:

Negative impacts on native fish and vegetation 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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