Invasive Species Northern Ireland

Himalayan knotweed

Koenigia polystachya

Status:

Established

Habitat:

Terrestrial

Threats:

Quick growing and difficult to control. Habitat generalist.

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Hottentot fig

Carpobrotus edulis

Status:

Established

Habitat:

Terrestrial

Threats:

Changes to dune environments.

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Japanese knotweed

Fallopia japonica

Status:

Established

Habitat:

Terrestrial

Threats:

Reduction of species diversity.

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Japanese Rose

Rosa rugosa

Status:

Established

Habitat:

Terrestrial

Threats:

Alters soil nutritrion, leading to altered native species biodiversity. May alter coastal landscape by forming sand dunes

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Japanese skeleton shrimp

Caprella mutica

Status:

Established

Habitat:

Marine

Threats:

Reproduces quickly. Outcompetes native species.

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Leathery sea squirt

Styela clava

Status:

Established

Habitat:

Marine

Threats:

Competes against native species for food and space. Fouls boats, oyster beds and moorings

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Mandarin Duck

Aix galericulata

Status:

Established

Habitat:

Terrestrial

Threats:

Could compete with other hole-nesting ducks such as Goldeneye and Goosander for nesting habitat

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Montbretia

Crocosmia X crocosmiiflora

Status:

Established

Habitat:

Terrestrial

Threats:

Outcompetes native species. Can cause streambank collapse if population is too high.

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Muntjac deer

Muntiacus reevesi

Status:

Established

Habitat:

Terrestrial

Threats:

Preventing seed regeneration of important conservation species.

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