Laminaria saccharina and robust red algae on Atlantic infralittoral gravel and pebble

Description (English)

Shallow kelp community found on gravel and gravelly sand in slightly less exposed areas than MB1-274 but in moderately strong tidal currents, and characterised by occasional Laminaria saccharina with an undergrowth of robust red seaweeds. Characteristic red seaweeds, as with MB1-274, include Plocamium cartilagineum, Halarachnion ligulatum and Brongniartella byssoides ; however the greater stability of this biotope allows a slightly more diverse range of red seaweeds to become established including Polyides rotundus, Rhodophyllis divaricata, Delesseria sanguinea and Nitophyllum punctatum. Coralline encrusting algae may be found covering the larger pebbles. Laminaria hyperborea may also be present within this biotope, although at low densities. Other brown algal species present include Desmarestia spp., Dictyota dichotoma and Chorda filum, all at low abundance. The ubiquitous green seaweed Ulva sp. may be found attached to larger pebbles.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MB32112
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 Brongniartella byssoides
Algae Chorda filum
Algae Delesseria sanguinea
Algae Halarachnion ligulatum
Algae Laminaria hyperborea
Algae Laminaria saccharina
Algae Nitophyllum punctatum
Algae Plocamium cartilagineum
Algae Polyides rotundus
Algae Rhodophyllis divaricata
Species scientific name English common name Species group
Brongniartella byssoides Algae
Chorda filum Algae
Delesseria sanguinea Algae
Halarachnion ligulatum Algae
Laminaria hyperborea Algae
Laminaria saccharina Algae
Nitophyllum punctatum Algae
Plocamium cartilagineum Algae
Polyides rotundus Algae
Rhodophyllis divaricata Algae

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A5.5212 Laminaria saccharina and robust red algae on infralittoral gravel and pebble same
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A5.5212 Laminaria saccharina and robust red algae on infralittoral gravel and pebble same
EUNIS Habitat Classification 200308 A3.235 Ephemeral red seaweeds and kelps on tide-swept mobile infralittoral cobbles wider
EUNIS Habitat Classification 200202 A3.235 Ephemeral red seaweeds and kelps on tide-swept mobile infralittoral cobbles overlap
EUNIS Habitat Classification 199910 A3.235 Ephemeral red seaweeds and kelps on tide-swept mobile infralittoral cobbles overlap
MNCR BioMar 97.06 (Britain & Ireland) MIR.SedK.EphR Ephemeral red seaweeds and kelps on tide-swept mobile infralittoral cobbles overlap
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