Invasion
Invasion Description
1st Record: San Diego/CA/Mission Bay (1971, Abbott and Johnson 1972; Carlton 1979)
Geographic Extent
San Diego/CA/Mission Bay (1971, Abbott and Johnson 1972; Carlton 1979; 2012, (2012, Tracy and Reyns 2014)); Quivera Basin, Dana Landing, South Shores Boat Ramp, Mission Bay Yacht Club; San Diego County/CA/Mission Bay (Cohen et al. 2002; Lambert and Lambert 2003; (2012, Tracy and Reyns 2014); Dana Point Marina, San Diego/CA/Mission Bay (2003, de Rivera et al. 2005a); San Diego/CA/Mission Bay (2000, Fairey et al. 2002; 2011, California Department of Fish and Wildlife 2014)
Vectors
| Level | Vector |
|---|---|
| Probable | None |
Regional Impacts
| Ecological Impact | Competition | |
| Styela clava is abundant in Southern California harbors, often forming dense patches with 100% cover (Lambert and Lambert 1998; Lambert and Lambert 2003). It and other introduced ascidians have replaced the native species Pyura haustor and Ascidia ceratodes in southern California harbors (Lambert and Lambert 1998). | ||