Invasion
Invasion Description
1st Record: CA/Newport Bay (MacGinitie 1939, cited by Carlton 1979);
Geographic Extent
CA/Newport Bay (MacGinitie 1939, cited by Carlton 1979); Fun Zone, Newport/CA/Newport Harbor (1996, Lambert and Lambert 2003; Zhan et al. 2010, molecular ID); Lido Island, Newport/CA/Newport Harbor (1996, 1997, 1998, Lambert and Lambert 2003; Ruiz and Geller 2021, 10 of 10 sites sampled)
Vectors
| Level | Vector |
|---|---|
| Probable | Hull Fouling |
Regional Impacts
| Ecological Impact | Competition | |
| Ciona robusta formed large monospecific patches in Newport Bay, 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). | ||