Invasion
Invasion Description
1st Record: CA/Elkhorn Slough (1955, Carlton 1979, Byers 1999);
Geographic Extent
CA/Elkhorn Slough (1955, Carlton 1979, Byers 1999; at all stations sampled, Wasson et al. 2001; dramatic population decline at many sites in Elkhorn Slough)
Vectors
| Level | Vector |
|---|---|
| Probable | Oyster Accidental |
Regional Impacts
| Ecological Impact | Competition | |
| The native snail Cerithidea californica is absent in Elkhorn Slough, but may have been previously present, based on sketchy historical records and its presence to the north and south (Byers 1999). Based on observations in three other estuaries, B. attramentaria may have eliminated Cerithidea californica from Elkhorn Slough (Byers 1999). | ||