Laminaria hyperborea forest and foliose red seaweeds on tide-swept upper infralittoral mixed substrata

English name: Laminaria hyperborea forest and foliose red seaweeds on tide-swept upper infralittoral mixed substrata

Quick facts

EUNIS habitat type code A3.2131
Bern Convention Included in a Resolution 4 habitat type at a higher level (A3)

Description (English)

Moderately wave-exposed to wave sheltered, tide-swept mixed substrata, with dense Laminaria hyperborea forest and sparser Laminaria saccharina, characterised by an under-storey and stipe flora of foliose seaweeds. The kelp stipes support epiphytes such as Palmaria palmata Callophyllis laciniata, Cryptopleura ramosa, Membranoptera alata, and Phycodrys rubens. At some sites, instead of being covered by red seaweeds, the kelp stipes are heavily encrusted by the ascidians Botryllus schlosseri and in the south-west Distomus variolosus. Epilithic seaweeds (Delesseria sanguinea, Plocamium cartilagineum, Odonthalia dentata, Dictyota dichotoma and Desmarestia aculeata) 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. Although these species are also found in most kelp forests, in this biotope they are particularly dense. On the rock surface, a rich fauna comprising anthozoans such as Urticina felina, the barnacle Balanus crenatus, the calcareous tubeworm Pomatoceros triqueter, colonial ascidians such as Clavelina lepadiformis, the gastropods Calliostoma zizyphinum and Gibbula cineraria, and the bryozoans Electra pilosa and Alcyonidium diaphanum occur. Also found on the rock are the echinoderms Echinus esculentus, Asterias rubens and Ophiothrix fragilis, and the crabs Cancer pagurus, Pagurus bernhardus and Necora puber.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Alcyonidium diaphanum
Invertebrates Asterias rubens
Invertebrates Balanus crenatus
Invertebrates Botryllus schlosseri
Invertebrates Calliostoma zizyphinum
Algae Callophyllis laciniata
Invertebrates Cancer pagurus
Invertebrates Clavelina lepadiformis
Algae Cryptopleura ramosa
Algae Delesseria sanguinea
Algae Desmarestia aculeata
Algae Dictyota dichotoma
Invertebrates Distomus variolosus
Invertebrates Echinus esculentus
Invertebrates Electra pilosa
Invertebrates Gibbula cineraria
Algae Laminaria hyperborea
Algae Laminaria saccharina
Invertebrates Membranipora membranacea
Algae Membranoptera alata
Invertebrates Necora puber
Invertebrates Obelia geniculata
Algae Odonthalia dentata
Invertebrates Ophiothrix fragilis
Invertebrates Pagurus bernhardus
Algae Palmaria palmata
Algae Phycodrys rubens
Algae Plocamium cartilagineum
Invertebrates Pomatoceros triqueter
Invertebrates Urticina felina
Species scientific name English common name Species group
Alcyonidium diaphanum Invertebrates
Asterias rubens Invertebrates
Balanus crenatus Invertebrates
Botryllus schlosseri Invertebrates
Calliostoma zizyphinum Invertebrates
Callophyllis laciniata Algae
Cancer pagurus Invertebrates
Clavelina lepadiformis Invertebrates
Cryptopleura ramosa Algae
Delesseria sanguinea Algae
Desmarestia aculeata Algae
Dictyota dichotoma Algae
Distomus variolosus Invertebrates
Echinus esculentus Invertebrates
Electra pilosa Invertebrates
Gibbula cineraria Invertebrates
Laminaria hyperborea Algae
Laminaria saccharina Algae
Membranipora membranacea Invertebrates
Membranoptera alata Algae
Necora puber Invertebrates
Obelia geniculata Invertebrates
Odonthalia dentata Algae
Ophiothrix fragilis Invertebrates
Pagurus bernhardus Invertebrates
Palmaria palmata Algae
Phycodrys rubens Algae
Plocamium cartilagineum Algae
Pomatoceros triqueter Invertebrates
Urticina felina Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 IR.MIR.KR.LhypTX.Ft <I>Laminaria hyperborea</I> forest and foliose red seaweeds on tide-swept upper infralittoral mixed substrata 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 A3.2131 Laminaria hyperborea forest and foliose red seaweeds on tide-swept upper infralittoral mixed substrata same
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