EUNIS habitat classification 2017 > M - Marine benthic habitats > MB3 - Infralittoral coarse sediment > MB32 - Atlantic infralittoral coarse sediment > MB321 - Kelp and seaweed communities on Atlantic infralittoral coarse sediment > MB3214 - Laminaria saccharina and Gracilaria gracilis with sponges and ascidians on variable salinity Atlantic infralittoral sediment

Laminaria saccharina and Gracilaria gracilis with sponges and ascidians on variable salinity Atlantic 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 (MB3-213). 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 MB3214
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Gracilaria gracilis
Algae Laminaria saccharina
Algae Pterothamnion plumula
Invertebrates Ascidiella aspersa
Invertebrates Balanus crenatus
Invertebrates Dendrodoa grossularia
Invertebrates Hydractinia echinata
Invertebrates Suberites ficus
Species scientific name English common name Species group
Gracilaria gracilis Algae
Laminaria saccharina Algae
Pterothamnion plumula Algae
Ascidiella aspersa Invertebrates
Balanus crenatus Invertebrates
Dendrodoa grossularia Invertebrates
Hydractinia echinata Invertebrates
Suberites ficus Invertebrates

Other classifications

History

Classification Code Habitat type name Relationship type Comment
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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