Invasion
Invasion Description
1st Record: San Diego/CA/San Diego Bay (1976, Carlton 1979)
Geographic Extent
San Diego/CA/San Diego Bay (1976, Carlton 1979); Chula Vista Boat Ramp, San Diego/CA/San Diego Bay (2000, Cohen et al. 2002); San Diego/CA/San Diego Bay (1998, Ranasinghe et al. 2005; 2011, California Department of Fish and Wildlife 2014)
Vectors
| Level | Vector |
|---|---|
| Alternate | Hull Fouling |
| Alternate | Ballast Water |
| Alternate | None |
Regional Impacts
| Ecological Impact | Habitat Change | |
| In San Diego Bay, A. senhousia had both negative and positive effects on the eelgrass Zostera marina in experiments, reducing rhizome growth, but increasing sediment ammonium and enhancing leaf growth (Dexter and Williams 1998). | ||
| Ecological Impact | Competition | |
| In experiments in Mission and San Diego Bays, settling young of A. senhousia out-compete native bivalves (Chione undatella and Laevicardium substriatum) for space, by overgrowing them (Castorani and Hovel 2015). | ||
| Ecological Impact | Trophic Cascade | |
| ne factor in the replacement of native bivalves by Arcuatula senhousia is that the heavy settlement of the mussel attract native perdators(Castorani and Hovel 2015) | ||