BIOTIC

BIOTIC Species Information for Edwardsia ivelli
All Taxonomy Biology Distribution Reproduction

Researched by	Angus Jackson	Data supplied by	MarLIN
Refereed by	Dr Simon K. Davy
Distribution and Habitat
Distribution in Britain & Ireland	Widewater lagoon, West Sussex.
Global distribution	Widewater lagoon, West Sussex, England.
Biogeographic range	Not researched	Depth range	<1 m
Migratory	Non-migratory / Resident
Distribution Additional Information	This 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 preferences	Mud	Physiographic preferences	Isolated saline water (Lagoon)
Biological zone	Lagoonal	Wave exposure	Not relevant Ultra Sheltered Extremely Sheltered
Tidal stream strength/Water flow	Very Weak (negligible)	Salinity	Not relevant Insufficient information
Habitat Preferences Additional Information
Distribution References	Manuel, 1988, Sheader & Sheader, 1990, Manuel, 1975,