Porphyra purpurea or Enteromorpha spp. on sand-scoured mid or lower eulittoral rock

English name: Porphyra purpurea or Enteromorpha spp. on sand-scoured mid or lower eulittoral rock

Description (English)

Exposed and moderately exposed mid-shore bedrock and boulders occurring adjacent to areas of sand which significantly affects the rock. As a consequence of sand-abrasion, wracks such as Fucus vesiculosus or Fucus spiralis are scarce and the community is typically dominated by ephemeral red or green seaweeds, particularly the foliose red seaweed Porphyra purpurea and green seaweeds such as Enteromorpha spp. Under the blanket of ephemeral seaweeds, the barnacles Semibalanus balanoides or Elminius modestus and the limpet Patella vulgata may occur in the less scoured areas, along with the occasional winkles Littorina littorea and Littorina saxatilis. Few other species are present.
Situation: Usually found below the species impoverished biotope dominated by Enteromorpha spp. (unit A1.451) and above the F. spiralis zone (A1.312). It may replace the zone dominated by the wrack Pelvetia canaliculata (A1.211). In areas where sand abrasion is less severe, the sand-binding red alga Rhodothamniella floridula occurs with other sand-tolerant seaweeds and the wrack Fucus serratus (Rho), along with the mussel Mytilus edulis.
Temporal variation: Seasonal fluctuations in the abundance of the Enteromorpha spp. and the P. purpurea will occur, especially as a result of storm action.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A1.452

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Fucus serratus
Algae Fucus spiralis
Algae Fucus vesiculosus
Algae Pelvetia canaliculata
Algae Porphyra purpurea
Algae Rhodothamniella floridula
Invertebrates Elminius modestus
Invertebrates Littorina littorea
Invertebrates Littorina saxatilis
Invertebrates Mytilus edulis
Invertebrates Patella vulgata
Invertebrates Semibalanus balanoides
Species scientific name English common name Species group
Fucus serratus Algae
Fucus spiralis Algae
Fucus vesiculosus Algae
Pelvetia canaliculata Algae
Porphyra purpurea Algae
Rhodothamniella floridula Algae
Elminius modestus Invertebrates
Littorina littorea Invertebrates
Littorina saxatilis Invertebrates
Mytilus edulis Invertebrates
Patella vulgata Invertebrates
Semibalanus balanoides Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.FLR.Eph.EntPor <I>Porphyra purpurea</I> and <I>Enteromorpha</I> spp. on sand-scoured mid or lower eulittoral rock source
CORINE Land Cover 4.2.3. Intertidal flats n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A1.452 Porphyra purpurea or Enteromorpha spp. on sand-scoured mid or lower eulittoral rock same
EUNIS Habitat Classification 200308 A1.242 Porphyra purpurea or Enteromorpha spp. on sand-scoured mid or lower eulittoral rock same
EUNIS Habitat Classification 200202 A1.242 Porphyra purpurea or Enteromorpha spp. on sand-scoured mid or lower eulittoral rock same
EUNIS Habitat Classification 199910 A1.232 Porphyra purpurea or Enteromorpha spp. on sand-scoured mid or lower eulittoral rock same
MNCR BioMar 97.06 (Britain & Ireland) MLR.Eph.EntPor Porphyra purpurea or Enteromorpha spp. on sand-scoured mid or lower eulittoral rock same
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