Mixed Laminaria hyperborea and Laminaria saccharina park on sheltered lower Atlantic infralittoral rock

Quick facts

EUNIS habitat type code MB12392
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Description (English)

Sheltered silted, bedrock and boulders with a park of mixed Laminaria hyperborea and Laminaria saccharina. Both kelp species are sparse in the park (Frequent). Beneath the often 'cape-form' kelp canopy, foliose red seaweeds such as Delesseria sanguinea, Cryptopleura ramosa, Heterosiphonia plumosa and Brongniartella byssoides are often present at high densities on the silted rock. Other red seaweeds such as encrusting coralline algae, Phycodrys rubens, Callophyllis laciniata, Bonnemaisonia asparagoides and Plocamium cartilagineum can be present. Other brown seaweeds include Dictyota dichotoma and Desmarestia aculeata. The animal component of this biotope is generally richer than the upper infralittoral mixed kelp forest (MB1-2391). A variety of hydroids such as Obelia geniculata grow epiphytically on the kelp fronds along with the bryozoan Membranipora membranacea. The echinoderm Antedon bifida and ascidians such as Clavelina lepadiformis attach to the kelp stipes, above the silted rock. The rock itself supports anthozoans such as Caryophyllia smithii and Urticina felina as well as the tube-building polychaete Pomatoceros triqueter and the crab Necora puber. Grazers include the prominent echinoderm Echinus esculentus and the gastropods Gibbula cineraria and Calliostoma zizyphinum. Where pockets of sediment occur, there may be an increase in infaunal species such as the burrowing anthozoan Cerianthus lloydii, the brittlestar Ophiura albida, and starfish Asterias rubens. Although there is a decrease in the number of algal species in the kelp park, the abundance remains relatively high.
Situation: These mixed kelp parks are generally found below the mixed kelp forest (unit MB1-2391) where there is a continuation of suitable hard substrata present. These sheltered kelps are also frequently found on bedrock or boulder exposures (MC1-21) adjacent to sediment seabed characterised by infaunal species. Where silted, circalittoral rock occurs below the kelp park a variety of biotopes may be found characterised by varying amounts of featherstars, anthozoans, solitary ascidians and sponge communities (e.g. units MC1-233, MC1-232, MC1-231, MC1-234 and MC2-223).

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Bonnemaisonia asparagoides
Algae Brongniartella byssoides
Algae Callophyllis laciniata
Algae Cryptopleura ramosa
Algae Delesseria sanguinea
Algae Desmarestia aculeata
Algae Dictyota dichotoma
Algae Heterosiphonia plumosa
Algae Laminaria hyperborea
Algae Laminaria saccharina
Algae Phycodrys rubens
Algae Plocamium cartilagineum
Invertebrates Antedon bifida
Invertebrates Asterias rubens
Invertebrates Calliostoma zizyphinum
Invertebrates Caryophyllia smithii
Invertebrates Clavelina lepadiformis
Invertebrates Echinus esculentus
Invertebrates Gibbula cineraria
Invertebrates Membranipora membranacea
Invertebrates Necora puber
Invertebrates Obelia geniculata
Invertebrates Ophiura albida
Invertebrates Pomatoceros triqueter
Invertebrates Urticina felina
Species scientific name English common name Species group
Bonnemaisonia asparagoides Algae
Brongniartella byssoides Algae
Callophyllis laciniata Algae
Cryptopleura ramosa Algae
Delesseria sanguinea Algae
Desmarestia aculeata Algae
Dictyota dichotoma Algae
Heterosiphonia plumosa Algae
Laminaria hyperborea Algae
Laminaria saccharina Algae
Phycodrys rubens Algae
Plocamium cartilagineum Algae
Antedon bifida Invertebrates
Asterias rubens Invertebrates
Calliostoma zizyphinum Invertebrates
Caryophyllia smithii Invertebrates
Clavelina lepadiformis Invertebrates
Echinus esculentus Invertebrates
Gibbula cineraria Invertebrates
Membranipora membranacea Invertebrates
Necora puber Invertebrates
Obelia geniculata Invertebrates
Ophiura albida Invertebrates
Pomatoceros triqueter Invertebrates
Urticina felina Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A3.3122 Mixed Laminaria hyperborea and Laminaria saccharina park on sheltered lower infralittoral rock same
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A3.3122 Mixed Laminaria hyperborea and Laminaria saccharina park on sheltered lower infralittoral rock same
EUNIS Habitat Classification 200308 A3.3112 Mixed Laminaria hyperborea and Laminaria saccharina park on sheltered lower infralittoral rock same
EUNIS Habitat Classification 200202 A3.3112 Mixed Laminaria hyperborea and Laminaria saccharina park on sheltered lower infralittoral rock same
EUNIS Habitat Classification 199910 A3.3112 Mixed Laminaria hyperborea and Laminaria saccharina park on sheltered lower infralittoral rock same
MNCR BioMar 97.06 (Britain & Ireland) SIR.K.LhypLsac.Pk Mixed Laminaria hyperborea and Laminaria saccharina park on sheltered lower infralittoral rock same
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100