Species Accounts – Invasive Species Northern Ireland

Common yabby

Cherax destructor

Status:

Potential

Habitat:

Freshwater

Threats:

Can carry crayfish plague and outcompete native white-clawed crayfish.

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Cotoneaster

Cotoneaster spp.

Status:

Established

Habitat:

Terrestrial

Threats:

Outcompetes native species. Easily spread.

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Coypu

Myocastor coypus

Status:

Potential

Habitat:

Terrestrial

Threats:

Riparian, wetland habitats destruction

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Crangonyx

Crangonyx pseudogracilis

Status:

Established

Habitat:

Freshwater

Threats:

Can displace native species

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Crimson fountaingrass

Cenchrus setaceus

Status:

Potential

Habitat:

Terrestrial

Threats:

It can readily outcompete native plants with important negative impact on vulnerable native species. It is also inflammable.

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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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Dace

Leuciscus leuciscus

Status:

Potential

Habitat:

Freshwater

Threats:

Negative impacts on native salmonids.

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Demon shrimp

Dikerogammarus haemobaphes

Status:

Early stage establishment

Habitat:

Freshwater

Threats:

Can cause significant alterations to invertebrate community structure through predation and competition for resources

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Devil’s tongue weed

Grateloupia turuturu

Status:

Established

Habitat:

Marine

Threats:

Outcompetes native species. Can survive in a wide range of habitats.

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