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Marine Habitat Classification


Description of biotope or habitat type

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   Fucoids on sheltered marine shores


Habitat (physical) description

Salinity Full (30-35 ppt)
Wave exposure Sheltered, Very sheltered, Extremely sheltered
Tidal streams
Substratum Bedrock; stable boulders; cobbles
Zone Eulittoral
Depth Band Lower shore, Mid shore, Upper shore
Other Features

Download comparative physical and biological data. The comparative tables enable a rapid comparison of the species composition and principal physical characteristics between a given set of biotopes.

Distribution of habitat LR.LLR.F Fucoids on sheltered marine shores

  • Records used to define the biotope (core records)
  • Other records assigned to this biotope, marked as 'certain'
  • Other records assigned to this biotope, marked as 'uncertain'

Point data based on records in the UK Marine Recorder Snapshot.

Description

Dense blankets of fucoid seaweeds dominating sheltered to extremely sheltered rocky shores and/or in locally sheltered patches on exposed to moderately exposed rocky shores. Typically, the wrack Pelvetia canaliculata (Pel) occurs on the upper shore, with the wrack Fucus spiralis (Fspi) below. The middle shore is dominated by vast areas of the wrack Ascophyllum nodosum or the wrack Fucus vesiculosus (Asc, Fves) or a mixture of both. The wrack Fucus serratus covers lower shore bedrock and boulders (Fser). Sheltered to very sheltered mixed substrata (pebbles and cobbles overlying muddy sand and gravel) shores can support fucoid communities (Fspi.X; Fves.X; Asc.X; Fserr.X).

Situation

Sheltered shores (i.e. estuaries and sea lochs) below the lichen dominated zone and above the kelp dominated zone in the sublittoral or sheltered patches on more wave exposed shores.

Temporal variation

No temporal variation data available.

Characterising Species

Taxon Typical abundance - SACFOR scale % of core records where taxon was recorded
Semibalanus balanoides Frequent 41-60 %
Carcinus maenas Occasional 41-60 %
Littorina obtusata/mariae Common 21-40 %
Patella vulgata Frequent 41-60 %
Littorina littorea Frequent 41-60 %
Littorina saxatilis Frequent 21-40 %
Mytilus edulis Occasional 21-40 %
Ascophyllum nodosum Common 41-60 %
Fucus ceranoides Rare 1-20 %
Fucus serratus Frequent 21-40 %
Fucus spiralis Common 21-40 %
Fucus vesiculosus Common 41-60 %
Ascophyllum nodosum mackaii Rare 1-20 %
Enteromorpha intestinalis Occasional 41-60 %

Similar biotopes

Not applicable or unknown.

Biotope history

Classification Habitat code
97.06 SLR.F

Photos

LR.LLR.F Fucoids on sheltered marine shores, Carsaig. Roger Mitchell © JNCC
LR.LLR.F Fucoids on sheltered marine shores, Carsaig. Roger Mitchell © JNCC
LR.LLR.F Fucoids on sheltered marine shores, NW of Carness, Loch Leven. Teresa Bennett © JNCC
LR.LLR.F Fucoids on sheltered marine shores, NW of Carness, Loch Leven. Teresa Bennett © JNCC

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