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Marine Habitat Classification


Description of biotope or habitat type

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   Infralittoral muddy sand


Habitat (physical) description

Salinity Full (30-35 ppt), Variable (18-35 ppt)
Wave exposure Moderately exposed, Sheltered
Tidal streams Moderately strong (1-3 kn), Weak (>1 kn), Very weak (negligible)
Substratum Fine to very fine sand with a silt fraction
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.SSa.IMuSa Infralittoral muddy 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

Non-cohesive muddy sand (with 5% to 20% silt/clay) in the infralittoral zone, extending from the extreme lower shore down to more stable circalittoral zone at about 15-20 m. The habitat supports a variety of animal-dominated communities, particularly polychaetes (Magelona mirabilis, Spiophanes bombyx and Chaetozone setosa), bivalves (Fabulina fibula and Chamelea gallina) and the urchin Echinocardium cordatum.

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
Nephtys 7 Common 61-80 %
Nephtys cirrosa 2 Common 21-40 %
Nephtys hombergii 2 41-60 %
Scoloplos armiger 1 21-40 %
Spio 1 Frequent 21-40 %
Spiophanes bombyx 13 Common 61-80 %
Magelona mirabilis 16 Common 81-100 %
Cirratulidae 2 Common 21-40 %
Chaetozone setosa 11 Common 81-100 %
Arenicola marina 12 Frequent 41-60 %
Lanice conchilega 14 Occasional 41-60 %
Bathyporeia 2 Frequent 21-40 %
Diastylis bradyi 1 21-40 %
Pagurus bernhardus 11 Occasional 41-60 %
Liocarcinus depurator 4 Occasional 21-40 %
Nucula nitidosa 3 Frequent 41-60 %
Ensis 8 Frequent 41-60 %
Phaxas pellucidus 2 Common 21-40 %
Fabulina fabula 14 Common 81-100 %
Abra alba 1 21-40 %
Abra prismatica 1 21-40 %
Chamelea gallina 5 Common 41-60 %
Asterias rubens 5 Occasional 41-60 %
Echinocardium cordatum 22 Frequent 61-80 %
Pomatoschistus 1 Occasional 21-40 %
Pleuronectidae 2 Frequent 21-40 %
Diatoms - film 3 Common 21-40 %

Similar biotopes

Not applicable or unknown.

Biotope history

Classification Habitat code
97.06 IMS.FaMS

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