Invasion
Invasion Description
1st Record: Jacks Landing/CA/Channel Islands Harbor (Lambert and Lambert 1998; Cohen et al. 2002; Lambert and Lambert 2003)
Geographic Extent
Jacks Landing/CA/Channel Islands Harbor (1994, Lambert and Lambert 1998; Cohen et al. 2002; Fairey et al. 2002; Lambert and Lambert 2003); Anacap Islands Marina/CA/Channel Islands Harbor (1994, Lambert and Lambert 1998; Cohen et al. 2002; Fairey et al. 2002; Lambert and Lambert 2003); Oxnard/CA/Channel Islands Harbor (2003, de Rivera et al. 2005a); Oxnard/CA/Channel Islands Harbor (2001, Fairey et al. 2002; 2003, de Rivera et al. 2005a; 2011, California Department of Fish and Wildlife 2014); Oxnard/CA/Port Hueneme (2011, California Department of Fish and Wildlife 2014)
Vectors
| Level | Vector |
|---|---|
| Probable | Hull Fouling |
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). | ||