Species Accounts – Invasive Species Northern Ireland

Giant kelp

Macrocystis pyrifera

Status:

Potential

Habitat:

Marine

Threats:

Outcompete native plants, shading and reduction in oxygen levels

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Giant knotweed

Reynoutria sachalinensis

Status:

Established

Habitat:

Terrestrial

Threats:

Quick growing and difficult to control. Habitat generalist.

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Giant reed

Arundo donax

Status:

Potential

Habitat:

Brackish

Threats:

Competition with native plants, shading of waterways

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Giant rhubarb

Gunnera tinctoria

Status:

Established

Habitat:

Terrestrial

Threats:

Competition with native species.

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Golden mussel

Limnoperna fortunei

Status:

Potential

Habitat:

Freshwater

Threats:

Fouls pipes, filters and intakes of water works. Colonises native bivalves and displaces native species. Increases algal blooms

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Golden wreath wattle

Acacia saligna (Acacia cyanophylla)

Status:

Potential

Habitat:

Terrestrial

Threats:

Outcompetes native species

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Grey squirrel

Sciurus carolinensis

Status:

Established

Habitat:

Terrestrial

Threats:

Threatens red squirrel and woodlands.

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Gyrodactylus salaris

Status:

Potential

Habitat:

Freshwater

Threats:

Serious negative impacts on salmonid stocks.

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Harlequin ladybird

Harmonia axyridis

Status:

Established

Habitat:

Terrestrial

Threats:

Alert: Specimen found in Ireland.

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