Species Accounts – Invasive Species Northern Ireland

Mediterranean Mussel

Mytilus galloprovincialis

Status:

Early stage establishment

Habitat:

Marine

Threats:

Outcompetes and displaces native mussels. Reduces genetic diversity of the native Mytilus species through hybridisation.

Find out more ›

Mesquite

Prosopis juliflora

Status:

Potential

Habitat:

Terrestrial

Threats:

Outcompetes native flora for recources

Find out more ›

Montbretia

Crocosmia X crocosmiiflora

Status:

Established

Habitat:

Terrestrial

Threats:

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

Find out more ›

Mummichog

Fundulus heteroclitus

Status:

Potential

Habitat:

Brackish

Threats:

Alter ecosystem structure, increase competition with native fish, population declines of native endangered fish species

Find out more ›

Muntjac deer

Muntiacus reevesi

Status:

Established

Habitat:

Terrestrial

Threats:

Preventing seed regeneration of important conservation species.

Find out more ›

Muskrat

Ondatra zibethicus

Status:

Potential

Habitat:

Terrestrial

Threats:

They change the composition of native wetland vegetation, and their burrowing degrades river banks.

Find out more ›

Narrow-clawed crayfish

Pontastacus leptodactylus

Status:

Potential

Habitat:

Freshwater

Threats:

Can impact habitat structure and outcompete native crayfish

Find out more ›

New Zealand flatworm

Arthurdendyus triangulatus

Status:

Established

Habitat:

Terrestrial

Threats:

Significant reduction of native earthworms.

Find out more ›

New Zealand pigmyweed

Crassula helmsii

Status:

Established

Habitat:

Freshwater

Threats:

Competition with native species.

Find out more ›