EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A5 - Sublittoral sediment > A5.1 - Sublittoral coarse sediment > A5.14 - Circalittoral coarse sediment > A5.141 - Pomatoceros triqueter with barnacles and bryozoan crusts on unstable circalittoral cobbles and pebbles

Pomatoceros triqueter with barnacles and bryozoan crusts on unstable circalittoral cobbles and pebbles

English name: 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 available

Species mentioned in habitat description

Invertebrates Balanus balanus
Invertebrates Balanus crenatus
Invertebrates Hydrallmania falcata
Invertebrates Pomatoceros triqueter
Invertebrates Sertularia argentea
Species scientific name English common name Species group
Balanus balanus Invertebrates
Balanus crenatus Invertebrates
Hydrallmania falcata Invertebrates
Pomatoceros triqueter Invertebrates
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
For relation to plant communities (syntaxa), see Vegetation types

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
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