BIOTIC Species Information for Edwardsia ivelli
Researched byAngus Jackson Data supplied byMarLIN
Refereed byDr Simon K. Davy
Distribution and Habitat
Distribution in Britain & IrelandWidewater lagoon, West Sussex.
Global distributionWidewater lagoon, West Sussex, England.
Biogeographic rangeNot researched Depth range<1 m
MigratoryNon-migratory / Resident   
Distribution Additional InformationThis species has not been recorded since 1983. Three surveys have since failed to record this species. It may be that it exists in such low numbers that rediscovery in surveys is unlikely. Additionally, the conditions in the lagoon have varied considerably over the last 20 years. Water levels have fallen as a result of little seawater input, the remaining water is hypersaline. Areas of the lagoon basin have become exposed, subsequently changes in the lagoon community have been recorded. It has been suggested that this species may now be extinct.

Substratum preferencesMud
Physiographic preferencesIsolated saline water (Lagoon)
Biological zoneLagoonal
Wave exposureNot relevant
Ultra Sheltered
Extremely Sheltered
Tidal stream strength/Water flowVery Weak (negligible)
SalinityNot relevant
Insufficient information
Habitat Preferences Additional Information
Distribution References Manuel, 1988, Sheader & Sheader, 1990, Manuel, 1975,
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