BIOTIC

BIOTIC Species Information for Botryllus schlosseri
All Taxonomy Biology Distribution Reproduction

Researched by	Lizzie Tyler	Data supplied by	University of Sheffield
Refereed by	This information is not refereed.
Distribution and Habitat
Distribution in Britain & Ireland	Found all around Britain and Ireland
Global distribution	Present from the Faeroe Islands and west and south Norway to the Mediterranean including the Adriatic and Black Seas. Also present in the western Atlantic from Maine to New Jersey and in Florida.
Biogeographic range	Not researched	Depth range
Migratory	Non-migratory / Resident
Distribution Additional Information	Populations in the western Atlantic may have arrived on shipping and it is likely that, as a fast-growing fouling organism, Botryllus schlosseri may spread readily to other parts of the world.

Substratum preferences	Bedrock Cobbles Large to very large boulders Small boulders	Physiographic preferences	Open coast Strait / sound Sealoch Ria / Voe
Biological zone	Lower Eulittoral Sublittoral Fringe Upper Infralittoral Lower Infralittoral Upper Circalittoral	Wave exposure	Moderately Exposed Very Exposed Exposed Sheltered Very Sheltered
Tidal stream strength/Water flow	Very Strong (>6 kn) Strong (3-6 kn) Moderately Strong (1-3 kn) Weak (<1 kn) Very Weak (negligible)	Salinity	Full (30-40 psu) Variable (18-40 psu)
Habitat Preferences Additional Information
Distribution References	Berril, 1950, Hayward & Ryland, 1990,