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Marine Habitat Classification


Description of biotope or habitat type

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   Laminaria saccharina and filamentous red algae on infralittoral sand


Habitat (physical) description

Salinity Full (30-35 ppt)
Wave exposure Moderately exposed, Sheltered, Very sheltered
Tidal streams Moderately strong (1-3 kn), Weak (>1 kn), Very weak (negligible)
Substratum Sand with some gravel
Zone Infralittoral
Depth Band 0-5 m, 5-10 m, 10-20 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 SS.SMp.KSwSS.LsacR.Sa <I>Laminaria saccharina</I> and filamentous red algae on infralittoral sand

  • 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

Shallow kelp community found on sand and slightly gravelly sand, in moderately exposed and sheltered conditions, with weak tidal currents. The community is characterised by occasional Laminaria saccharina with an undergrowth of red algae. Characteristic red seaweeds, as with LsacR.Gv, include Plocamium cartilagineum, Polyides rotundus, Polysiphonia elongate and Lomentaria clavellosa. Coralline encrusting algae is much less important in this biotope as a result of a lack of suitable substrate. Brown algal species present, as with other LsacR biotopes, include Desmarestia spp., Dictyota dichotoma and Chorda filum, all at low abundance. The ubiquitous green seaweed Ulva sp. may also be present. The sandy substrate is home to a variety of typical sand dwelling infauna including polychaetes (Scoloplos armiger, Exogone hebes, and Aricidea minuta), amphipods (Ampelisca brevicornis), and bivalves (Lucinoma borealis and Abra alba). Arenicola worm casts and Lanice worm tubes may be visible at the sediment surface.

Situation

No situation data available.

Temporal variation

No temporal data available.

Characterising Species

Taxon Relative importance of taxon for defining this community (%) Typical abundance - SACFOR scale % of core records where taxon was recorded
Cerianthus lloydii 2 Occasional 41-60 %
Nemertea 4 61-80 %
Exogone hebes 7 Frequent 61-80 %
Scoloplos armiger 10 61-80 %
Aricidea minuta 6 61-80 %
Spiophanes bombyx 4 61-80 %
Chaetopterus variopedatus 2 Occasional 41-60 %
Arenicola marina 4 Frequent 41-60 %
Terebellidae 1 Occasional 21-40 %
Lanice conchilega 3 Occasional 41-60 %
Pomatoceros triqueter 2 Occasional 41-60 %
Urothoe elegans 4 61-80 %
Ampelisca brevicornis 19 81-100 %
Pariambus typicus 4 61-80 %
Pagurus bernhardus 8 Frequent 81-100 %
Cancer pagurus 1 Rare 41-60 %
Liocarcinus depurator 5 Occasional 61-80 %
Gibbula magus 2 Occasional 41-60 %
Gibbula cineraria 1 Occasional 21-40 %
Pecten maximus 1 Occasional 21-40 %
Lucinoma borealis 10 61-80 %
Ensis 2 Frequent 21-40 %
Ensis arcuatus 1 Common 21-40 %
Abra alba 10 61-80 %
Thracia villosiuscula 4 61-80 %
Cochlodesma praetenue 4 61-80 %
Asterias rubens 7 Occasional 81-100 %
Echinus esculentus 2 Occasional 41-60 %
Echinocardium cordatum 8 61-80 %
Pomatoschistus minutus 2 Occasional 21-40 %
Polyides rotundus 2 Occasional 41-60 %
Plocamium cartilagineum 2 Occasional 41-60 %
Lomentaria clavellosa 2 Occasional 41-60 %
Ceramium 1 Frequent 21-40 %
Pterothamnion plumula 1 Frequent 21-40 %
Polysiphonia elongata 3 Occasional 41-60 %
Desmarestia aculeata 1 Occasional 21-40 %
Desmarestia viridis 2 Occasional 41-60 %
Chorda filum 2 Occasional 41-60 %
Laminaria saccharina 9 Occasional 81-100 %
Ulva 2 Occasional 41-60 %

Similar biotopes

SS.SMp.KSwSS.LsacR.Gv
Similar in species composition, but differ in sediment characteristics and therefore infaunal species composition.

SS.SMp.KSwSS.LsacR.Mu
Similar in species composition, but differ in sediment characteristics and therefore in infaunal species composition.


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