Invasive Species Ireland

Brown rat

Rattus norvegicus

Status:

Established

Habitat:

Terrestrial

Threats:

Negative impacts on native flora and fauna.

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Carpet sea squirt

Didemnum vexilum

Status:

Potential

Habitat:

Marine

Threats:

colonies overgrowing and swamping other species and covering fish spawning grounds, aquaculture cages etc.

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Chinese mitten crab

Eriocheir sinensis

Status:

Potential

Habitat:

Freshwater

Threats:

Threatens ecosystem functioning and protected species.

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Chub

Squalius cephalus

Status:

Established

Habitat:

Freshwater

Threats:

Negative impacts on native salmonid species. Associated economic impacts.

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Citrus Longhorn Beetle

Anoplophora chinensis

Status:

Potential

Habitat:

Terrestrial

Threats:

Detrimental impacts on trees.

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Common Milkweed

Asclepias syriaca

Status:

Potential

Habitat:

Terrestrial

Threats:

Overwhelming valuable habitats such as grasslands, dune areas and river valleys.

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Coypu

Myocaster coypus

Status:

Established

Habitat:

Terrestrial

Threats:

Riparian, wetland habitats destruction

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Crayfish plague

Aphanomyces astaci

Status:

Established

Habitat:

Freshwater

Threats:

Destruction of the native White - Clawed Crayfish population

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Curly waterweed

Lagarosiphon major

Status:

Established

Habitat:

Freshwater

Threats:

Significant changes to the ecology of the invaded habitat for native plants, insects and fish.

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