Invasion
Invasion Description
1st Record: San Diego/CA/Tijuana River Estuary (1995, Lee et al. 2008; Pilgrim et al. 2013) (Pacific Estuarine Research Laboratory (2001) TIJUANA RIVER NATIONAL ESTUARINE RESEARCH RESERVE: REPORT ON ECOSYSTEM MONITORING Report of Monitoring Conducted January 1 - June 30, 2001http://www.perl.sdsu.edu/Reports/TJReports/TJE_Jan-Jun_2001.pdf)
Geographic Extent
San Diego/CA/Tijuana River Estuary (Pacific Estuarine Research Laboratory (2001) TIJUANA RIVER NATIONAL ESTUARINE RESEARCH RESERVE: REPORT ON ECOSYSTEM MONITORING Report of Monitoring Conducted January 1 - June 30, 2001http://www.perl.sdsu.edu/Reports/TJReports/TJE_Jan-Jun_2001.pdf)
Vectors
| Level | Vector |
|---|---|
| Alternate | None |
| Alternate | Ballast Water |
Regional Impacts
| Ecological Impact | Food/Prey | |
| Food/Prey- Grandidierella japonica is the predominant amphipod in the Tijuana River estuary, San Diego, California. It has become a major food item for several native fishes (Longjaw Mudsucker-Gillichthys mirabilis; Staghorn Sculpin- Leptocottus armatus; California Halibot- Paralichthys californicus (West et al. 2003). In the Tijuana estuary, this amphipod was a major user of detritus from invasive Tamarix shrubs (Whitcraft et al. 2008), potentially transferring this resource from the marsh sediments to higher trophic levels. | ||