Invasive Species Northern Ireland

Japanese hop

Humulus scandens

Status:

Potential

Habitat:

Terrestrial

Threats:

Outcompetes native species.

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Japanese stiltgrass

Microstegium vimineum

Status:

Potential

Habitat:

Terrestrial

Threats:

It creates dense impenetrable stands that crowd out the native vegetation within 3-5 years

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Killer shrimp

Dikerogammarus villosus

Status:

Potential

Habitat:

Freshwater

Threats:

Efficient predator. Adapatable to new freshwater systems. Highly mobile.

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Kingsnake

Lampropeltis getula

Status:

Potential

Habitat:

Terrestrial

Threats:

Predates on native reptiles and possibly other native fauna. A potential disease and parasite vector

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Large-flowered waterweed

Egeria densa

Status:

Potential

Habitat:

Freshwater

Threats:

Competition with native plants, shading and blocking waterways, eutrophication and reduction of biodiversity

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Marbled crayfish

Procambarus fallax f. virginalis

Status:

Potential

Habitat:

Freshwater

Threats:

Potential threat of native crayfish. Potential threat to wetlands by extensive burrowing activities.

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Mesquite

Prosopis juliflora

Status:

Potential

Habitat:

Terrestrial

Threats:

Outcompetes native flora for recources

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Mummichog

Fundulus heteroclitus

Status:

Potential

Habitat:

Brackish

Threats:

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

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Muskrat

Ondatra zibethicus

Status:

Potential

Habitat:

Terrestrial

Threats:

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

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