Invasive Species Northern Ireland

Asian clam

Corbicula fluminea

Status:

Established

Habitat:

Freshwater

Threats:

Competition with native species. Biofouling.

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Bloody-red shrimp

Hemimysis anomala

Status:

Established

Habitat:

Freshwater

Threats:

Alteration of ecosystem dynamics. Competition with native species.

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Canadian waterweed

Elodea canadensis

Status:

Established

Habitat:

Freshwater

Threats:

Creates single species stands. Outcompetes native plants. Reduces waterflow.

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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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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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Floating pennywort

Hydrocotyle ranunculoides

Status:

Established

Habitat:

Freshwater

Threats:

Clogs waterways and negatively impacts on native species and ecosystems.

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Fringed water lily

Limnanthemum peltatum, N. nymphaeoides, N. peltata

Status:

Established

Habitat:

Freshwater

Threats:

Pioneer species. Fast growing. Spreads vegetatively.

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New Zealand pigmyweed

Crassula helmsii

Status:

Established

Habitat:

Freshwater

Threats:

Competition with native species.

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Nuttalls waterweed

Elodea nuttallii

Status:

Established

Habitat:

Freshwater

Threats:

Negative impacts on native macrophytes and invertebrates.

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