Invasion
Invasion Description
1st record: CA/San Francisco Bay (1912, Shoemaker 1947, Carlton 1979)
Geographic Extent
CA/Bodega Bay (Standing 1975, cited by Carlton 1979; Fairey et al. 2002); CA/Tomales Bay (1961, Johnson and Juskevice 1965, cited by Carlton 1979; 2001, Fairey et al. 2002; 2011, California Department of Fish and Wildlife 2014); CA/Bolinas Lagoon (Light 1969, cited by Carlton 1979); CA/San Francisco Bay (1912, Shoemaker 1947, Carlton 1979); cargo ship 'Florikan'/CA/Suisun Bay (Llanso et al. 2011); CA/Carquinez Straits (Cohen and Carlton 1995); Port San Pablo Yacht Harbor/CA/San Pablo Bay (Cohen et al. 2005); CA/San Pablo Bay (1963, USNM 111339, U.S. National Museum of Natural History 2015; Cohen and Carlton 1995); Petaluma/CA/Petaluma River (Cohen and Carlton 1995); Sierra Point Marina/CA/South San Francisco Bay (Cohen et al. 2005); San Leandro Marina/ CA/South San Francisco Bay (Cohen et al. 2005); Presidio Yacht Club, San Francisco/CA/Golden Gate (Cohen et al. 2005); Pete's Harbor/CA/South San Francisco Bay (Cohen et al. 2005); Coyote Point/CA/South San Francisco Bay ( Cohen et al. 2005); ; Main Estuarine Zone (Suisun-San Pablo, mean salinity 16.1 PSU) to Marine-Muddy Zone (South and Central Bays, mean salinity 27.5 PSU); CA/South Francisco Bay (2012-2013, Jimenez et al. 2017, common on hard and soft substrates); CA/"Monterey Bay (Elkhorn Slough?)" (Shoemaker 1947, cited by Carlton 1979); CA/Elkhorn Slough (1977, Carlton 1979; Wasson et al. 2000); Moss Landing/CA/Moss Landing Harbor (2011, California Department of Fish and Wildlife 2014); CA/Morro Bay (1960, Reish and Barnard 1960, cited by Carlton 1979; 2001, Fairey et al. 2002; Needles 2007; Needles and Wendt 2012; 2011, California Department of Fish and Wildlife 2014)
Vectors
Level | Vector |
---|---|
Alternate | Hull Fouling |
Alternate | Oyster Accidental |
Regional Impacts
Ecological Impact | Herbivory | |
Nichols and Thompson (1985) suggested that an upstream movement of abundant suspension-feeding benthos, including M. acherusicum, was responsible for a decline in phytoplankton biomass in Suisun Bay during 1976-1977, a dry period of high salinity (Nichols and Thompson 1985). | ||