|Basic Information||Biotope classification||Ecology||Habitat preferences and distribution||Species composition||Sensitivity||Importance|
Image Sue Scott - View down shore showing upper shore bedrock with Fucus distichus and green algae. Image width ca XX cm.
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LR.HLR.FR.Fdis recorded () and expected () distribution in Britain and Ireland (see below)
|Distribution of biotope in Britain and Ireland||This biotope is rare and is only found on the coasts of the far north and west of Scotland including Shetland, Orkney, the Outer Hebrides and St. Kilda.|
For a full description of this biotope including characterizing species, distribution, survey information and references visit JNCC
Extremely exposed gently or steeply sloping upper shore bedrock may support a mixture of Fucus distichus and Fucus spiralis f. nana, the latter often at the top of the zone. This biotope is rare and restricted to the far north and west coasts. This mixed band is generally found between the Verrucaria maura and Porphyra zone (LR.Ver.Por) above, and the Mytilus edulis and barnacle zone below (ELR.MytB). Although it may occur above a red algal zone (MLR.Mas), as recorded on Barra or above a Porphyra and sparse barnacle zone (LR.Ver.Por) as on St Kilda. (Information taken from the Marine Biotope Classification for Britain and Ireland, Version 97.06: Connor et al., 1997a, b).
This review can be cited as follows:
Hill, J.M. 2005. Fucus distichus and Fucus spiralis f. nana on extremely exposed upper shore rock. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 30/11/2015]. Available from: <http://www.marlin.ac.uk/habitatsbasicinfo.php?habitatid=234&code=2004>