Pomatoceros triqueter with barnacles and bryozoan crusts on unstable circalittoral cobbles and pebbles
Description (English)
This biotope is characterised by a few ubiquitous robust and/or fast growing ephemeral species which are able to colonise pebbles and unstable cobbles and slates which are regularly moved by wave and tidal action. The main cover organisms tend to be restricted to calcareous tube worms such as Pomatoceros triqueter (or P. lamarcki), small barnacles including Balanus crenatus and Balanus balanus, and a few bryozoan and coralline algal crusts. Scour action from the mobile substratum prevents colonisation by more delicate species. Occasionally in tide-swept conditions tufts of hydroids such as Sertularia argentea and Hydrallmania falcata are present. This biotope often grades into A5.444 which is characterised by large amounts of the above hydroids on stones also covered in Pomatoceros and barnacles. The main difference here is that A5.444, seems to develop on more stable, consolidated cobbles and pebbles or larger stones set in sediment in moderate tides. These stones may be disturbed in the winter and therefore long-lived and fragile species are not found.
Situation: This biotope is found on exposed open coasts as well as at the entrance to marine inlets.
Source: EUNIS habitat classification
Quick facts
EUNIS habitat type | code A5.141 |
---|---|
Bern Convention | Included in a Resolution 4 habitat type at a higher level (A5) |
Vegetation types
Relation to vegetation types (syntaxa)
Not availableSpecies mentioned in habitat description
Species scientific name | English common name | Species group |
---|---|---|
Sertularia argentea | Invertebrates |
Other classifications
Classification | Code | Habitat type name | Relationship type |
---|---|---|---|
Marine Habitat Classification Britain/Ireland 0405 | SS.SCS.CCS.PomB | <I>Pomatoceros triqueter</I> with barnacles and bryozoan crusts on unstable circalittoral cobbles and pebbles | source |
CORINE Land Cover | 5.2.3. | Sea and ocean | n/a |
History
Classification | Code | Habitat type name | Relationship type |
---|---|---|---|
EUNIS Habitat Classification 200410 | A5.131 | Pomatoceros triqueter with barnacles and bryozoan crusts on unstable circalittoral cobbles and pebbles | same |
EUNIS Habitat Classification 200308 | A4.132 | Pomatoceros triqueter with barnacles and bryozoan crusts on unstable circalittoral cobbles and pebbles | same |
EUNIS Habitat Classification 200202 | A4.132 | Pomatoceros triqueter, Balanus crenatus and bryozoan crusts on mobile circalittoral cobbles and pebbles | same |
EUNIS Habitat Classification 199910 | A4.142 | Pomatoceros triqueter, Balanus crenatus and bryozoan crusts on mobile circalittoral cobbles and pebbles | same |
MNCR BioMar 97.06 (Britain & Ireland) | ECR.EFa.PomByC | Pomatoceros triqueter, Balanus crenatus and bryozoan crusts on mobile circalittoral cobbles and pebbles | same |