Invasion
Invasion Description
1st Record: CA/San Francisco Bay (1954, Jones 1954, cited by Carlton 1979)
Geographic Extent
CA/San Francisco Bay (1954, Carlton 1979, most abundant invertebrate in mesohaline and polyhaline zones, Gillett et al. 2012); Richmond Marina/CA/San Francisco Bay (2004, Cohen et al. 2005); CA/South Bay to Carquinez Straits and Suisun Bay (San Francisco Bay) (Cohen and Carlton 1996); Adjacent To Public Boat Launch Facilities, Vallejo/CA/Mare Island Strrait (1973, USNM 235005, U.S. National Museum of Natural History 2015); Port Sonoma/CA/San Pablo Bay (2004, Cohen et al. 2005); Port San Pablo/CA/San Pablo Bay (2004, Cohen et al. 2005); CA/San Pablo Bay (1987-2003, Peterson et al. 2010, one of 3 dominant organisms); Selby, Contra Costa County/CA/Carquinez Strait (1984, CAS IZ 136473.00, California Academy of Sciences 2015); Solano County/CA/Grizzly Bay (1987, CAS IZ 132870.00, California Academy of Sciences 2015); Sierra Point Marina/CA/South San Francisco Bay (2004, Cohen et al. 2005);; Pete's Harbor/CA/South San Francisco Bay (2004, Cohen et al. 2005); Coyote Point Marina/CA/South San Francisco Bay (2004, Cohen et al. 2005); Fresh-Brackish-Estuarine Transition (Suisun-San Pablo, mean salinity 4.9 PSU) to Marine-Muddy (South and Central Bays, mean salinity 27.5 PSU), Lee et al. 2003); Sherman Island/CA/Sacramento-San Joaquin Delta (Hopkins 1986); CA/San Francosco Bay (2012-2016, 34% of all infaunal taxa. Jimenez et al. 2019).
Vectors
| Level | Vector |
|---|---|
| Alternate | Ballast Water |
| Alternate | Hull Fouling |
| Alternate | Oyster Accidental |
| Alternate | Discarded Bait |
| Alternate | Fisheries Accidental (not Oyster) |
Regional Impacts
| Ecological Impact | Competition | |
| Nichols and Thompson (1985) observed that settlement of Macoma petalum (as M. balthica) was reduced during peak abundances of A. abdita, suggesting competition for food or space. | ||
| Ecological Impact | Herbivory | |
| Nichols and Thompson (1985) suggested that an upstream movement of abundant suspension-feeding benthos, including A. abdita, was responsible for a decline in phytoplankton biomass in Suisun Bay during 1976-1977, a dry period of high salinity (Nichols and Thompson 1985). | ||
| Ecological Impact | Food/Prey | |
| Tube-dwelling and free-living gammarid amphipods were important food items for several native (Tule Perch- Hysterocarpus traskii, Prickly Sculpin- Cottus asper, Starry Flounder- Platichthys stellatus) and introduced fishes (Acanthogobius longimanus, Yellowfin Goby) (Feyrer et al. 2003). | ||