EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A5 - Sublittoral sediment > A5.5 - Sublittoral macrophyte-dominated sediment > A5.52 - Kelp and seaweed communities on sublittoral sediment > A5.525 - Laminaria saccharina and Gracilaria gracilis with sponges and ascidians on variable salinity infralittoral sediment

Laminaria saccharina and Gracilaria gracilis with sponges and ascidians on variable salinity infralittoral sediment

English name: Laminaria saccharina and Gracilaria gracilis with sponges and ascidians on variable salinity infralittoral sediment

Description (English)

Shallow kelp community found on stony sediment, in extremely sheltered, variable salinity conditions, with moderately strong tidal currents. The community is characterised by a more sparse covering of Laminaria saccharina, particularly when compared to the fully marine version of this sub biotope (A5.524). Beneath the canopy the community is characterised by the red algae Gracilaria gracilis, and a variety of faunal species in particular sponges (Suberites ficus and Halichondria panacea) and ascidians (Ascidiella aspersa and Dendrodoa grossularia). The stony substrate provides a surface for attachment for these and many other filter and suspension feeding species, particularly barnacles (Balanus crenatus), hydroids (Urticina feline and Hydractinia echinata) and anemones. Other members of the understory may include a variety of filamentous and foliose red algae in particular Pterothamnion plumula, and the green alga Ulva.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A5.525
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 Ascidiella aspersa
Invertebrates Balanus crenatus
Invertebrates Dendrodoa grossularia
Algae Gracilaria gracilis
Invertebrates Hydractinia echinata
Algae Laminaria saccharina
Algae Pterothamnion plumula
Invertebrates Suberites ficus
Species scientific name English common name Species group
Ascidiella aspersa Invertebrates
Balanus crenatus Invertebrates
Dendrodoa grossularia Invertebrates
Gracilaria gracilis Algae
Hydractinia echinata Invertebrates
Laminaria saccharina Algae
Pterothamnion plumula Algae
Suberites ficus Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 SS.SMp.KSwSS.LsacGraVS <I>Laminaria saccharina</I> and <I>Gracilaria gracilis</I> with sponges and ascidians on variable salinity infralittoral sediment 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 A5.525 Laminaria saccharina and Gracilaria gracilis with sponges and ascidians on variable salinity infralittoral sediment same
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