Laminaria hyperborea on tide-swept, infralittoral rock

English name: Laminaria hyperborea on tide-swept, infralittoral rock

Quick facts

EUNIS habitat type code A3.212
Bern Convention Included in a Resolution 4 habitat type at a higher level (A3)

Description (English)

Wave exposed to moderately wave exposed, tide-swept bedrock and boulders with Laminaria hyperborea, characterised by a rich under-storey and stipe flora of foliose seaweeds including the brown seaweed Dictyota dichotoma. The kelp stipes support epiphytes such as Cryptopleura ramosa and Phycodrys rubens. At some sites, instead of being covered by red seaweeds, the kelp stipes are heavily encrusted by the ascidian Botryllus schlosseri. Epilithic seaweeds Delesseria sanguinea, Plocamium cartilagineum Heterosiphonia plumosa, Hypoglossum hypoglossoides, Callophyllis laciniata, Kallymenia reniformis, Brongniartella byssoides and crustose seaweeds commonly occur beneath the kelp. The kelp fronds are often covered with growth of the hydroid Obelia geniculata or the bryozoan Membranipora membranacea. On the rock surface, a rich fauna comprising the bryozoan Electra pilosa, the sponge Pachymatisma johnstonia, anthozoans such as Alcyonium digitatum, Sagartia elegans and Urticina felina, colonial ascidians such as Clavelina lepadiformis, the calcareous tubeworm Pomatoceros triqueter and the barnacle Balanus crenatus occur. More mobile species include the gastropod Calliostoma zizyphinum, the crab Cancer pagurus and the echinoderms Asterias rubens and Echinus esculentus. Two variants have been described: Tide-swept kelp forest (unit A3.2121) and tide-swept kelp park (unit A3.2122).
Situation: This biotope occurs below Alaria esculenta (Ala) at exposed sites or L. digitata (Ldig.Ldig) at moderately exposed locations. With increasing depth the kelp density diminishes to become tide-swept kelp park (A3.2122).

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Alaria esculenta
Algae Brongniartella byssoides
Algae Callophyllis laciniata
Algae Cryptopleura ramosa
Algae Delesseria sanguinea
Algae Dictyota dichotoma
Algae Heterosiphonia plumosa
Algae Hypoglossum hypoglossoides
Algae Kallymenia reniformis
Algae Laminaria hyperborea
Algae Phycodrys rubens
Algae Plocamium cartilagineum
Invertebrates Alcyonium digitatum
Invertebrates Asterias rubens
Invertebrates Balanus crenatus
Invertebrates Botryllus schlosseri
Invertebrates Calliostoma zizyphinum
Invertebrates Cancer pagurus
Invertebrates Clavelina lepadiformis
Invertebrates Echinus esculentus
Invertebrates Electra pilosa
Invertebrates Membranipora membranacea
Invertebrates Obelia geniculata
Invertebrates Pachymatisma johnstonia
Invertebrates Pomatoceros triqueter
Invertebrates Sagartia elegans
Invertebrates Urticina felina
Species scientific name English common name Species group
Alaria esculenta Algae
Brongniartella byssoides Algae
Callophyllis laciniata Algae
Cryptopleura ramosa Algae
Delesseria sanguinea Algae
Dictyota dichotoma Algae
Heterosiphonia plumosa Algae
Hypoglossum hypoglossoides Algae
Kallymenia reniformis Algae
Laminaria hyperborea Algae
Phycodrys rubens Algae
Plocamium cartilagineum Algae
Alcyonium digitatum Invertebrates
Asterias rubens Invertebrates
Balanus crenatus Invertebrates
Botryllus schlosseri Invertebrates
Calliostoma zizyphinum Invertebrates
Cancer pagurus Invertebrates
Clavelina lepadiformis Invertebrates
Echinus esculentus Invertebrates
Electra pilosa Invertebrates
Membranipora membranacea Invertebrates
Obelia geniculata Invertebrates
Pachymatisma johnstonia Invertebrates
Pomatoceros triqueter Invertebrates
Sagartia elegans Invertebrates
Urticina felina Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 IR.MIR.KR.LhypT <I>Laminaria hyperborea</I> on tide-swept, infralittoral rock 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 A3.212 Laminaria hyperborea on tide-swept, infralittoral rock same
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