|General Information||Taxonomy and identification||General biology||Habitat preferences and distribution||Reproduction and longevity||Sensitivity||Importance|
Image Keith Hiscock - Laminaria digitata at low tide. Image width ca 2 m in foreground.
Image copyright information
Laminaria digitata is not listed under any importance categories.
|Researched by:||Jacqueline Hill||Refereed by:||Dr Stefan Kraan|
|Phylum||Ochrophyta||Brown and yellow-green seaweeds|
|Recorded distribution in Britain and Ireland||Most coasts of Britain and Ireland, including Rockall. Scarce along east coast of England, particularly between Ouse and Thames estuaries, due to turbidity and lack of hard substrata. (Information continued in additional information).|
|Habitat information||Found attached to bedrock or other suitable hard substrata in the lower intertidal and sublittoral fringe, down to a maximum depth of 20 m in clear waters. Laminaria digitata flourishes in moderately exposed areas or at sites with strong water currents. In exposed locations with strong wave action the species may extend upwards into the lower eulittoral. Occurs in rockpools up to mid-tide level and higher on wave-exposed coasts.|
|Description||A large conspicuous kelp growing up to 2 m in length commonly found at low water during spring tides on rocky shores. The frond is broad and digitate, glossy and dark brown in colour and lacks a midrib. The stipe is oval in cross section, smooth and flexible and is usually free of epiphytes, although old stipes which have become slightly roughened may support a few epiphytes, notably Palmaria palmata. The kelp is attached by freely branched haptera, which spread out to form a shallow dome-shaped holdfast. Laminaria digitata may be confused with young Laminaria hyperborea plants. However, the stipe of Laminaria hyperborea is circular in cross section, is stiff and snaps easily when bent (although you won't see that in younger plants).|
This review can be cited as follows:
Jacqueline Hill 2008. Laminaria digitata. Oarweed. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 23/05/2013]. Available from: <http://www.marlin.ac.uk/speciesfullreview.php?speciesID=3613>