Invasion
Invasion Description
1st Record: Long Beach/CA/Long Beach Harbor (1955, Barnard 1958, cited by Carlton 1979);
Geographic Extent
Huntington Beach/CA/Huntington Harbor (2002, Fairey et al. 2002; 2018, Beshai et al. 2022); Long Beach/CA/Alamitos Bay (1959, Reish 1964, cited by Carlton 1979); CA/Colorado Lagoon (Crane et al. 1975, cited by by Carlton 1979); Long Beach Marina/CA/Alamitos Bay (1995, 1996, 1997, 2000, Lambert and Lambert 2003; Nydam and Harriosn 2007, molecular identification); Long Beach/CA/Long Beach Harbor (Barnard 1958, cited by Carlton 1979; 2001, Fairey et al. 2002; Ruiz and Geller 2021, 9 of 10 sites); Impound Marina, Long Beach/CA/Long Beach Harbor (1994, 1995, 1996, 1997,1998, 2000, Lambert and Lambert 2003); Watchorn Marina, Long Beach/CA/Long Beach Harbor (1994, 1995, 1996, 1997, 1998, 2000 Lambert and Lambert 2003); Los Angeles/CA/Los Angeles Harbor (2001, Fairey et al. 2002; 2011, California Department of Fish and Wildlife 2014)
Vectors
| Level | Vector |
|---|---|
| Alternate | Hull Fouling |
| Alternate | Ballast Water |
Regional Impacts
| Ecological Impact | Competition | |
| Ciona robusta formed large monospecific patches in Los Angeles-Long Beach Harbors, indicating strong competition (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). | ||