Invasion
Invasion Description
1st record: CA/San Francisco Bay (1853, Carlton and Zullo 1969; Carlton 1979)
Geographic Extent
Throughout San Fracisco Bay, but most abundant in mesohaline-upper oligohaline regions. Examples: San Mateo/CA/San Francisco Bay (1900, Carlton and Zullo 1969); Alviso, Santa Clara County/CA/San Francisco Bay (1902, Carlton and Zullo 1969); Redwood City/CA/Redwood City estuary (1915, Carlton and Zullo 1969); Alameda/CA/San Francisco Bay (1913, Carlton and Zullo 1969); Oakland/CA/Oakland Harbor (1922, Carlton and Zullo 1969); Dumbarton Bridge/CA/San Francisco Bay (1922, Carlton and Zullo 1969); Crockett/CA/Carquinez Straits (1923, Carlton and Zullo 1969); cargo ship 'Florikan'/CA/Suisun Bay (Llanso et al. 2011); Rodeo/CA/San Pablo Bay (1931, Carlton and Zullo 1969); Oakland/CA/Lake Merritt (Carlton and Zullo 1969); CA/Castro Creek, San Pablo Bay (Carlton and Zullo 1969); CA/Mare Island Strait (1970, Carlton and Zullo 1969); CA/Delta-Mendota Canal (1968, Carlton and Zullo 1969); CA/Suisun Bay (1939, Carlton and Zullo 1969); Palo Alto/CA/Palo Alto Yacht Harbor (Carlton and Zullo 1969); CA/San Francisco Bay (larvae, 1978, USNM 181250, U.S. National Museum of Natural History 2002); Fruitvale Bridge, Alamada/CA/Oakland Estuary (2004, Cohen et al. 2005); Petaluma/CA/Petaluma River Turning Basin (2004, Cohen et al. 2005); San Leandro Marina/CA/San Francisco Bay (2004, Cohen et al. 2005); Port Sonoma/CA/San Pablo Bay (2004, Cohen et al. 2005); Rodeo Marina/CA/San Pablo Bay (2004, Cohen et al. 2005); Moore's Landing/Canapa River (2004, Cohen et al. 2005); CA/Monterey Bay (establishment unknown, 1916, Carlton and Zullo 1969; Carlton 1979); CA/Mouth of Salinas River, Monterey Bay (establishment unknown, 1954, Carlton and Zullo 1969; Carlton 1979); CA/Elkhorn Slough (established, 1998); CA/Elkhorn Slough (established, 1998, Wasson et al. 2000; de Rivera et al. 2005); Moss Landing/CA/Moss Landing Harbor (2011, California Department of Fish and Wildlife 2014); CA/Morro Bay (2015,Ruiz and Geller 2021)
Vectors
Level | Vector |
---|---|
Alternate | Hull Fouling |
Alternate | Oyster Accidental |
Regional Impacts
Ecological Impact | Competition | |
Transplant experiments indicate that competition with Amphibalanus improvisus may limit growth and abundance of the introduced bryozoan Conopeum chesapeakensis at the less saline end of Carquinez Strait in the San Francisco estuary (Benicia, ~3.3 PSU, Newcomer et al. 2018). | ||