Pomatoceros triqueter with barnacles and bryozoan crusts on Atlantic circalittoral unstable 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 MC4-214 which is characterised by large amounts of the above hydroids on stones also covered in Pomatoceros and barnacles. The main difference here is that MC4-214, 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 MC3211 |
---|---|
Relation to | Annex I habitat types (EU Habitats Directive) |
Legal status
Relation to other habitat types mentioned in legal instruments
Legal text | Annex | Name in legal text | Code in legal text |
Habitat type relationship |
More information |
---|---|---|---|---|---|
Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora - consolidated version 01/01/2007 | Annex I: natural habitat types of community interest whose conservation requires the designation of special areas of conservation | Large shallow inlets and bays | 1160 | Overlap | http://ec.europa.eu/environm...rective/index_en.htm |
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 |
---|---|---|---|
EUNIS Habitat Classification 2007 (revised descriptions 2012) | A5.141 | Pomatoceros triqueter with barnacles and bryozoan crusts on unstable circalittoral cobbles and pebbles | same |
History
Classification | Code | Habitat type name | Relationship type | Comment |
---|---|---|---|---|
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 |