|Basic Information||Biotope classification||Ecology||Habitat preferences and distribution||Species composition||Sensitivity||Importance|
Image Anon. - A turf of Polyides rotundus, Furcellaria lumbricalis and filamentous brown algae. Image width ca 1m.
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IR.SIR.Lag.PolFur recorded () and expected () distribution in Britain and Ireland (see below)
EC Habitats Directive
|Habitat Directive feature (Annex 1)||Reefs
The dense algal turf probably provides shelter and foraging areas for fish, including gobies, wrasse and pipefish, and may provide nesting sites for the sticklebacks, Spinachia spinachia and Gasterosteus aculeatus.
Extraction of Furcellaria lumbricalis was reviewed by Guiry & Blunden (1991). Commercial beds of Furcellaria lumbricalis occur in Denmark where the algae are harvested with purpose built trawl nets, whereas in the rest of Europe, the biomass is not sufficient for harvesting. In Denmark, harvesting reached its highest level of 31,000 t p.a. in 1962, but over-exploitation has led to a fall in production and the current harvest is about 10,000 t p.a. Christensen (1971) (cited in Bird et al., 1991) and Plinski & Florczyk (1984) noted that over-exploitation of Furcellaria lumbricalis has resulted in severe depletion of stocks. A sustainable harvest of Furcellaria lumbricalis occurs in Canada on the shores of the Gulf of St Lawrence where the harvest is sustainable as dredging and raking are prohibited and only storm cast plants may be gathered.
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This review can be cited as follows:
Rayment, W.J. 2001. Polyides rotundus and/or Furcellaria lumbricalis on reduced salinity infralittoral rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 19/09/2014]. Available from: <http://www.marlin.ac.uk/habitatimportance.php?habitatid=316&code=1997>