BIOTIC Species Information for Nematostella vectensis
|Researched by||Charlotte Marshall & Angus Jackson||Data supplied by||MarLIN|
|Refereed by||Dr Simon Davy & Dr Martin Sheader|
|Distribution and Habitat|
|Distribution in Britain & Ireland||Found on north coast of Norfolk, the east coast of Suffolk, the Blackwater Estuary and Hamford Water in Essex, the Hampshire coast and on the south coast of Dorset.|
|Global distribution||In North America from Nova Scotia to Georgia on the Atlantic coast, from Florida to Louisiana in the Gulf of Mexico and from California to Washington on the Pacific coast. Also found on the South and East coast of England.|
|Biogeographic range||Not researched||Depth range||<1 m to 2 m max|
|Migratory||Non-migratory / Resident|
|Distribution Additional Information||The populations of this species in Britain may either be:
1) relicts from a larger earlier distribution,
2) have arrived in Britain from North America by natural mean or
3) have been introduced by human agency.
Dispersal between lagoons may be via floating mats of Chaetomorpha sp. thus extending their dispersal potential. Biological zone is not relevant because this species lives in lagoons, generally not exposed to tidal action.
Posey & Hines (1991) suggested that in the Rhode River, America, the distribution outside lagoons may be limited through predation by shrimps.
Nematostella vectensis is often found using Ruppia sp. or Chaetomorpha sp. as substrata (Williams, 1991).Depth
Although the species is usually found in water less than 1 m deep, a few live down to 2 m water depth (M. Sheader, pers. comm.).
Nematostella vectensis is found on north coast of Norfolk, the east coast of Suffolk, the Blackwater Estuary and Hamford Water in Essex (Carol Reid, English Nature, pers. comm.), the Hampshire coast and on the south coast of Dorset. Nematostella vectensis was first described as a new species from brackish pools on the Isle of Wight.
|Physiographic preferences||Isolated saline water (Lagoon)
||Wave exposure||Ultra Sheltered
|Tidal stream strength/Water flow||Very Weak (negligible)
||Salinity||Variable (18-40 psu)
Low (<18 psu)
|Habitat Preferences Additional Information|
|Distribution References||Manuel, 1988, Stephenson, 1935, Sheader et al., 1997, Hand & Uhlinger, 1992, Hand & Uhlinger, 1994, Posey & Hines, 1991,|