Species Accounts – Invasive Species Northern Ireland

Brush-clawed shore crab

Hemigrapsus takanoi

Status:

Potential

Habitat:

Marine

Threats:

High reproductive capacity. Outcompete native crabs.

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Butterfly bush

Buddleja davidii

Status:

Established

Habitat:

Terrestrial

Threats:

Forms monocultures. Reproduces sexually and asexually. Displaces native species.

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Canada goose

Branta canadensis

Status:

Established

Habitat:

Freshwater

Threats:

Can alter nutrient levels from their droppings, spread disease and damage farmland by grazing

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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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Carpet sea squirt

Didemnum vexillum

Status:

Established

Habitat:

Marine

Threats:

Alter marine habitats.

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Chinese bushclover

Lespedeza juncea var. sericea

Status:

Potential

Habitat:

Terrestrial

Threats:

Outcompetes native species

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Chinese mitten crab

Eriocheir sinensis

Status:

Potential

Habitat:

Freshwater

Threats:

Threatens ecosystem functioning and protected species.

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Chinese mystery snail

Cipangopaludina chinensis

Status:

Potential

Habitat:

Freshwater

Threats:

Could outcompete native freshwater snails and impact nutrient cycling.

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Chinese tallow

Triadica sebifera (Sapium sebiferum)

Status:

Potential

Habitat:

Terrestrial

Threats:

Outcompetes native flora

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