Invasion
Invasion Description
1st Record: Long Beach/CA/Long Beach Harbor (1994, Lambert and Lambert 1998); Impound Marina & Watchorn Marina, Long Beach/CA/ Long Beach Harbor (1994, Lamber and Lambert 2003)
Geographic Extent
Huntington Beach/CA/Huntington Harbor (2000, Fairey et al. 2002; 2011, California Department of Fish and Wildlife 2014; Beshai et al. 2022); Long Beach Marina/CA/Alamitos Bay (1971, Carlton 1979; Lambert and Lambert 1998; Cohen et al. 2002; Lambert and Lambert 2003); Impound Marina, Long Beach/CA/Long Beach Harbor (1994, Lambert and Lambert 1998; Lambert and Lambert 2003); Long Beach/CA/Long Beach Harbor (2000, Fairey et al. 2002); Watchorn Marina,Los Angeles/CA/ Los Angeles Harbor; (1996, Lambert and Lambert 1998; Cohen et al. 2002; Lambert and Lambert 2003); Los Angeles/CA/Los Angeles Harbor 2000, Fairey et al. 2002; 2011, California Department of Fish and Wildlife 2014; 2017, Ruiz and Geller 2021, 1of 10 sites)
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). | ||