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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.

   Cushion sponges and hydroids on turbid tide-swept sheltered circalittoral rock


Habitat (physical) description

Salinity Full (30-35 ppt), Variable (18-35 ppt)
Wave exposure Sheltered, Very sheltered, Extremely sheltered
Tidal streams Strong (3-6 kn), Moderately strong (1-3 kn), Weak (>1 kn)
Substratum Bedrock; boulders
Zone Circalittoral
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 CR.MCR.CFaVS.CuSpH Cushion sponges and hydroids on turbid tide-swept sheltered circalittoral 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'
  • 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

This biotope is found in variable salinity environments and tends to occur on the upper faces of circalittoral bedrock and boulders, in sheltered sites subject to moderately strong tidal streams. This biotope is characterised by aggregations of cushion sponges such as Hymeniacidon perleve, Halichondria panicea, Halichondria bowerbanki and Cliona celata, other sponges (Leucosolenia botryoides and Suberites ficus) along with occasional hydroid tufts of Nemertesia antennina, Nemertesia ramosa and Plumularia setacea. Other species that may be present include the colonial ascidians Clavelina lepadiformis and Morchellium argus, Dendrodoa grossularia, the anemones Metridium senile and Sagartia troglodytes, the barnacle Balanus crenatus, Asterias rubens, Carcinus maenas and Bugula plumosa. Two variants of this biotope have been recorded: CuSpH.VS and CuSpH.As.

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
Leucosolenia botryoides 1 Frequent 21-40 %
Suberites ficus 10 Frequent 61-80 %
Cliona celata 2 Occasional 21-40 %
Halichondria bowerbanki 2 Frequent 21-40 %
Halichondria panicea 7 Frequent 41-60 %
Hymeniacidon perleve 10 Frequent 61-80 %
Nemertesia antennina 6 Frequent 41-60 %
Nemertesia ramosa 3 Frequent 41-60 %
Plumularia setacea 5 Occasional 41-60 %
Metridium senile 3 Occasional 41-60 %
Sagartia troglodytes 1 Occasional 21-40 %
Balanus crenatus 7 Common 41-60 %
Carcinus maenas 3 Occasional 41-60 %
Bugula plumosa 2 Occasional 21-40 %
Asterias rubens 3 Occasional 41-60 %
Clavelina lepadiformis 9 Frequent 61-80 %
Morchellium argus 2 Occasional 41-60 %
Dendrodoa grossularia 1 Occasional 21-40 %

Similar biotopes

Not applicable or unknown.

Photos

CR.MCR.CFaVS.CuSpH Cushion sponges and hydroids on turbid tide-swept sheltered circalittoral rock, Barton Cliff, Milford Haven. Keith Hiscock © JNCC
CR.MCR.CFaVS.CuSpH Cushion sponges and hydroids on turbid tide-swept sheltered circalittoral rock, Barton Cliff, Milford Haven. Keith Hiscock © JNCC

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