EUNIS habitat classification 2012 > A - Marine habitats > A4 - Circalittoral rock and other hard substrata > A4.1 - Atlantic and Mediterranean high energy circalittoral rock

Atlantic and Mediterranean high energy circalittoral rock

English name: Atlantic and Mediterranean high energy circalittoral rock

Description (English)

Occurs on extremely wave-exposed to exposed circalittoral bedrock and boulders subject to tidal streams ranging from strong to very strong. Typically found in tidal straits and narrows. The high energy levels found within this habitat complex are reflected in the fauna recorded. Sponges such as Pachymatisma johnstonia, Halichondria panicea, Esperiopsis fucorum and Myxilla incrustans may all be recorded. Characteristic of this habitat complex is the dense 'carpet' of the hydroid Tubularia indivisa. The barnacle Balanus crenatus is recorded in high abundance on the rocky substrata. On rocky outcrops, Alcyonium digitatum is often present.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A4.1
Bern Convention Included in a Resolution 4 habitat type at a higher level (A4)
Relation to Annex I habitat types (EU Habitats Directive)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Other classifications

Classification Code Habitat type name Relationship type
CORINE Land Cover 5.2.3. Sea and ocean n/a
Marine Habitat Classification Britain/Ireland 0405 CR.HCR High energy circalittoral rock same
Biodiversity Broad Habitat Classification (UK) 24 Offshore shelf rock wider
Biodiversity Action Plan Priority Habitats (UK) 37 Tidal rapids overlap
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A4.1 Atlantic and Mediterranean high energy circalittoral rock same
EUNIS Habitat Classification 200308 A3.5 High energy circalittoral rock same
EUNIS Habitat Classification 200202 A3.5 Circalittoral rock very exposed to wave action or currents and tidal streams same
EUNIS Habitat Classification 199910 A3.5 Circalittoral rock very exposed to wave action or currents and tidal streams same
EUNIS Habitat Classification 199811 A3.5 Circalittoral rock very exposed to wave action or tidal currents same
EUNIS Habitat Classification 199712 A5.1 Circalittoral rock very exposed to wave or tide action same
MNCR BioMar 97.06 (Britain & Ireland) ECR Exposed circalittoral rock same
MNCR BioMar 96.7 (Britain & Ireland) ECR   same
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100