Invasion
Invasion Description
1st Record: Duck Island, Isles of Shoals/NH/Gulf of Maine (2-03, Bullard et al. 2007)
Geographic Extent
Duck Island, Isles of Shoals/NH/Gulf of Maine (2-03, Bullard et al. 2007)
Vectors
| Level | Vector |
|---|---|
| Alternate | Hull Fouling |
| Alternate | Fisheries Accidental (not Oyster) |
Regional Impacts
| Ecological Impact | Food/Prey | |
| Increasing abundance of the introduced colonial tunicates Didemnum vexillum and Diplosoma listerianum has resulted in population growth of the native Bloodstar starfish Henricia sanguinolenta (Dijkstra et al. 2012). | ||
| Ecological Impact | Trophic Cascade | |
| Increased abundance of the Bloodstar starfish (Henricia sanguinolenta), supported by growing populations of Didemnum vexillum and Diplosoma listerianum, has resulted in increased predation and near-disappearance of the cryptogenic sponge Halichondria panicea (Dijkstra et al. 2012). | ||