Invasion
Invasion Description
1st Reocrd: CA/Humboldt Bay ("present for at least 30 years", Boyd et al. 2002)
Geographic Extent
CA/Humboldt Bay ("present for at least 30 years", Boyd et al. 2002; 2000, Ruiz et al., unpublished data); Woodley Island Marina/CA/Humboldt Bay (2001, Fairey et al. 2002); Woodley Island Marina/CA/Humboldt Bay (Nelson 2009)
Vectors
| Level | Vector |
|---|---|
| Alternate | Hull Fouling |
| Alternate | Oyster Accidental |
| Alternate | Oyster Accidental |
| Alternate | None |
Regional Impacts
| Ecological Impact | Competition | |
| In fouling plate experiments in Humboldt Bay, Nelson (2009) found that colonial tunicates (Botryllus schlosseri and Botrylloides violaceus), growing in sheets, were able to quickly occupy space on fouling plates, but did not decrease recruitment or species richness. | ||