Species Accounts – Invasive Species Northern Ireland

Gammarus tigrinus

Status:

Established

Habitat:

Freshwater

Threats:

Predation on native species and bring novel diseases

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Giant hogweed

Heracleum mantegazzianum

Status:

Established

Habitat:

Terrestrial

Threats:

Public health hazard. Competition with native species.

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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 ramshorn snail

Marisa cornuarietis

Status:

Potential

Habitat:

Freshwater

Threats:

Threatens aquatic ecosystems consuming large amounts of vegetation, preying on eggs of, and competing with, native species.

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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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