Species Regional Summary
Gemma gemma
_CDA_P112 (Bodega Bay) ( P112 )

Invasion History Vectors Impacts References

Invasion

Invasion Description

1st Record: CA/Bodega Harbor (1974, Standing 1975, cited by Carlton 1979)

Geographic Extent

CA/Bodega Harbor (1974, Standing 1975, cited by Carlton 1979)

Vectors

Level Vector
Probable Oyster Accidental

Regional Impacts

Ecological ImpactCompetition
In Bodega Harbor, G. gemma was rare, until the arrival of the invasive Green Crab (Carcinus maenas), which preferred the larger Nutricola spp. In experiments, Gemma grew slowly in the presence of abundant Nutricola, but grew and reproduced much faster when Nutricola was rare (Grosholz 2005).
 

References

Full Reference List for Gemma gemma

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