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Marine Habitat Classification


Description of biotope or habitat type

To understand more about what this page is describing, see How to use the classification. See also How to cite.

   Fucus serratus on sheltered lower eulittoral rock


Habitat (physical) description

Salinity Full (30-35 ppt), Variable (18-35 ppt)
Wave exposure Sheltered, Very sheltered, Extremely sheltered
Tidal streams
Substratum Bedrock; boulders; cobbles
Zone Eulittoral - lower
Depth Band
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.Fserr <I>Fucus serratus</I> on sheltered lower eulittoral rock

  • 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

Sheltered to extremely sheltered lower eulittoral rock with Fucus serratus (for detailed description of the rich associated community please see Fserr.FS). Two variants of this biotope have been described. Fully marine conditions (Fserr.FS) and mixed substrata (Fserr.X). Please notice that three other biotopes with a F. serratus dominance have been described: Variable salinity (FserVS), tide-swept (FserT) and tide-swept on mixed substrata (FserXT).

Situation

This biotope usually occurs immediately below a dense canopy of Fucus vesiculosus (Fves) on sheltered shores or an Ascophyllum nodosum zone (Asc.FS) on sheltered shores; consequently low densities of these species may occur in this biotope. The sublittoral fringe below is dominated by the kelps Laminaria saccharina and Laminaria digitata on sheltered shores (Lsac.Ldig; Lsac.Ft).

Temporal variation

Unknown.

Characterising Species

Taxon Relative importance of taxon for defining this community (%) Typical abundance - SACFOR scale % of core records where taxon was recorded
Halichondria panicea 3 Occasional 41-60 %
Semibalanus balanoides 6 Frequent 41-60 %
Carcinus maenas 2 Occasional 41-60 %
Patella vulgata 3 Occasional 41-60 %
Littorina littorea 4 Occasional 41-60 %
Mytilus edulis 3 Occasional 21-40 %
Corallinaceae 3 Frequent 41-60 %
Mastocarpus stellatus 4 Frequent 41-60 %
Ascophyllum nodosum 2 Occasional 21-40 %
Fucus serratus 34 Abundant 81-100 %
Enteromorpha intestinalis 3 Frequent 41-60 %
Ulva lactuca 2 Frequent 21-40 %
Cladophora rupestris 1 Frequent 21-40 %

Similar biotopes

LR.MLR.BF.Fser.Bo
Occurs on large boulders and in a wider exposure range. Has a high species richness and mobile species such as the crabs Porcellana platycheles and Cancer pagurus and the starfish Asterias rubens are present in low numbers.

LR.MLR.BF.Fser.R
Occurs in slightly more wave exposed conditions. The species diversity and abundance of red seaweeds are higher. D. pumila can form dense populations on the F. serratus fronds.

Biotope history

Classification Habitat code
6.95 LRK.FSE in part
96.7 SLR.Fser

Photos

LR.LLR.F.Fserr Fucus serratus on sheltered lower eulittoral rock, N of Marshall Meadows Bay, Berwick -upon- Tweed. Paul Brazier © JNCC
LR.LLR.F.Fserr Fucus serratus on sheltered lower eulittoral rock, N of Marshall Meadows Bay, Berwick -upon- Tweed. Paul Brazier © JNCC
LR.LLR.F.Fserr Fucus serratus on sheltered lower eulittoral rock, White Sands, Torness. Eleanor Murray © JNCC
LR.LLR.F.Fserr Fucus serratus on sheltered lower eulittoral rock, White Sands, Torness. Eleanor Murray © JNCC
LR.LLR.F.Fserr Fucus serratus on sheltered lower eulittoral rock, Sponish Rapids. ANON © JNCC
LR.LLR.F.Fserr Fucus serratus on sheltered lower eulittoral rock, Sponish Rapids. ANON © JNCC

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