Invasion
Invasion Description
1st Records? Oxnard/CA/Port Hueneme (2000, Cohen et al. 2002); Jack's Landing, Oxnard/CA/Channel Islands Harbor (2000, Cohen et al. 2002); Anacapa Island Marina, Oxnard/CA/Channel Islands Harbor (2000, Cohen et al. 2002)
Geographic Extent
Oxnard/CA/Port Hueneme (2000, Cohen et al. 2002); Jack's Landing, Oxnard/CA/Channel Islands Harbor (2000, Cohen et al. 2002); Anacapa Island Marina, Oxnard/CA/Channel Islands Harbor (2000, Cohen et al. 2002)
Vectors
| Level | Vector |
|---|---|
| Alternate | Ballast Water |
| Alternate | Hull Fouling |
Regional Impacts
| Ecological Impact | Competition | |
| Competition with, and nearly complete replacement of, native M. trossulus occurred in southern California waters, possibly in the 1940s (Carlton 1979; McDonald et al. 1991; Suchanek et al. 1997). | ||
| Ecological Impact | Hybridization | |
| Hybridization between M. galloprovincialis and M. trossulus was probably widespread during the early invasion and replacement of M. trossulus. See the discussion for the bioregion for details. | ||