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Marine Habitat Classification


Description of biotope or habitat type

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   Laminaria hyperborea park and foliose red seaweeds on tide-swept lower infralittoral mixed substrata


Habitat (physical) description

Salinity Full (30-35 ppt)
Wave exposure Exposed, Moderately exposed
Tidal streams Very strong (>6 kn), Strong (3-6 kn), Moderately strong (1-3 kn)
Substratum Boulders, cobbles, pebbles & gravel
Zone Infralittoral - lower
Depth Band 10-20 m, 20-30 m
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 IR.MIR.KR.LhypTX.Pk <I>Laminaria hyperborea</I> park and foliose red seaweeds on tide-swept lower infralittoral mixed substrata

  • 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'
  • Predicted extent of the level 3 (for sublittoral rock & deep sea) or 4 (for sublittoral sediment) habitat

Point data based on records in the UK Marine Recorder Snapshot. Predicted habitat extent is from UKSeaMap.

Description

Exposed to moderately wave-exposed, tide-swept, Infralittoral mixed substrata with Laminaria hyperborea park characterised by an under-storey and stipe flora of foliose seaweeds such as Phycodrys rubens, Plocamium cartilagineum, Hypoglossum hypoglossoides, Kallymenia reniformis, Cryptopleura ramosa and Delesseria sanguinea. Epilithic seaweeds (Bonnemaisonia asparagoides, Callophyllis laciniata, Lomentaria orcadensis and Brongniartella byssoides) and crustose seaweeds commonly occur beneath the kelp. The foliose brown seaweed Dictyota dichotoma is often present as well. Amongst the red seaweeds is a fairly diverse fauna comprising sponges (Scypha ciliate), anthozoans (Alcyonium digitatum, Urticina felina and Caryophyllia smithii), hydroids (Tubularia indivisa, Halecium halecinum, Sertularia argentea and Nemertesia antennina), colonial ascidians (Botryllus schlosseri) and bryozoans such as Alcyonium diaphanum. On the rock surface, the calcareous tubeworm Pomatoceros triqueter, the crab Cancer pagurus and the gastropods Gibbula cineraria and Calliostoma zizyphinum may be found. A diverse range of echinoderms are also found in this biotope: Crossaster papposus, Henricia oculata, Asterias rubens, Echinus esculentus and Ophiothrix fragilis.

Situation

No situation data available.

Temporal variation

No temporal variation data available.

Characterising Species

Taxon Relative importance of taxon for defining this community (%) Typical abundance - SACFOR scale % of core records where taxon was recorded
Scypha ciliata 1 41-60 %
Tubularia indivisa 1 41-60 %
Halecium halecinum 1 41-60 %
Sertularia argentea 1 41-60 %
Nemertesia antennina 2 41-60 %
Alcyonium digitatum 3 41-60 %
Urticina felina 1 Rare 21-40 %
Caryophyllia smithii 2 41-60 %
Pomatoceros triqueter 2 41-60 %
Cancer pagurus 2 41-60 %
Gibbula cineraria 2 Rare 41-60 %
Calliostoma zizyphinum 4 61-80 %
Alcyonidium diaphanum 2 41-60 %
Crossaster papposus 2 41-60 %
Henricia oculata 1 41-60 %
Asterias rubens 4 61-80 %
Ophiothrix fragilis 1 41-60 %
Echinus esculentus 6 81-100 %
Botryllus schlosseri 1 21-40 %
Bonnemaisonia asparagoides 1 21-40 %
Callophyllis laciniata 2 61-80 %
Kallymenia reniformis 1 41-60 %
Plocamium cartilagineum 4 61-80 %
Lomentaria orcadensis 1 41-60 %
Cryptopleura ramosa 2 41-60 %
Delesseria sanguinea 4 61-80 %
Hypoglossum hypoglossoides 1 41-60 %
Phycodrys rubens 2 41-60 %
Brongniartella byssoides 1 41-60 %
Dictyota dichotoma 1 41-60 %
Laminaria hyperborea 6 81-100 %

Similar biotopes

IR.MIR.KR.LhypT.Pk
Occurs over similar range of tidal streams but found on bedrock and boulders.

IR.MIR.KR.LhypTX.Ft
Occurs on similar substrata but in shallower water depths in the upper infralittoral kelp forest zone.


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