BIOTIC

BIOTIC Species Information for Phymatolithon calcareum
All Taxonomy Biology Distribution Reproduction

Researched by	Angus Jackson	Data supplied by	MarLIN
Refereed by	Dr Christine Maggs
Distribution and Habitat
Distribution in Britain & Ireland	Recorded around the Shetland Orkney Islands and along the east coast of Scotland, south coast of England with isolated records at Bideford Bay, Pembrokeshire and Caernarfon Bay. Abundant around the west coasts of Ireland and Scotland
Global distribution	From Norway down to northern Spain. Includes the western Baltic and the Mediterranean
Biogeographic range	Not researched	Depth range	1-30m
Migratory	Not relevant
Distribution Additional Information	Most frequent at depths between 1-10 m. May be found deeper in clear waters, e.g. found at depths of up to 30 m in outer Galway Bay. %Phymatolithon calcareum% has been reported recently from 13-20m off Swange to Old Harry and off Bembridge, the Isle of Wight (Collins pers. comm.; Collins et al., 1990).

Substratum preferences	Pebbles Gravel / shingle Maerl Muddy gravel Coarse clean sand Fine clean sand Sandy mud Muddy sand Mud Mixed	Physiographic preferences	Open coast Strait / sound Sealoch Ria / Voe Estuary
Biological zone	Sublittoral Fringe Upper Infralittoral Lower Infralittoral	Wave exposure	Moderately Exposed Sheltered
Tidal stream strength/Water flow	Strong (3-6 kn) Moderately Strong (1-3 kn)	Salinity	Full (30-40 psu)
Habitat Preferences Additional Information
Distribution References	Campbell, 1994, Irvine & Chamberlain, 1994, Donnan & Davies, 1996, Birkett et al., 1998(a), Grall & Glémarec, 1997, Hall-Spencer & Moore, 2000a, Veale et al., 1999, Collins et al., 1990, Hardy & Guiry, 2003, Hardy & Guiry, 2003,