Ephemeral green or red seaweeds (freshwater or sand-influenced) on non-mobile substrata
Description (English)
Ephemeral seaweeds on disturbed littoral rock in the lower to upper shore. Dominant green seaweeds include Enteromorpha intestinalis, Ulva lactuca and the red seaweeds Rhodothamniella floridula and Porphyra purpurea. Winkles such as Littorina littorea and Littorina saxatilis, the limpet Patella vulgata and the barnacles Semibalanus balanoides can occur, though usually in low abundance. The crab Carcinus maenas can be found where boulders are present, while the barnacle Elminius modestus is usually present on sites subject to variable salinity. On moderately exposed shores, the biotope is Enteromorpha spp. on freshwater-influenced or unstable upper shore rock (A1.451) or P. purpurea and/or Enteromorpha spp. on sand-scoured mid to lower eulittoral rock (A1.452). These are biotopes with a low species diversity and the relatively high number of species in the characterising species list are due to a variation in the species composition from site to site, not to high species richness on individual sites.
Situation: This habitat type occurs the splash zone, sometimes on cliff faces, and throughout the main intertidal zone.
Note: Connor et al (2004) classify this habitat type together with A2.43 and A2.82 as LR.ELR.Eph.
Source: EUNIS habitat classification
Quick facts
EUNIS habitat type | code A1.45 |
---|
Vegetation types
Relation to vegetation types (syntaxa)
Not availableSpecies mentioned in habitat description
Species scientific name | English common name | Species group |
---|---|---|
Enteromorpha intestinalis | Algae | |
Ulva lactuca | Algae | |
Carcinus maenas | Invertebrates | |
Patella vulgata | Invertebrates |
Other classifications
Classification | Code | Habitat type name | Relationship type |
---|---|---|---|
CORINE Land Cover | 4.2.3. | Intertidal flats | n/a |
Marine Habitat Classification Britain/Ireland 0405 | LR.FLR.Eph | Ephemeral green or red seaweed communities (freshwater or sand-influenced) | narrower |
History
Classification | Code | Habitat type name | Relationship type |
---|---|---|---|
EUNIS Habitat Classification 200410 | A1.45 | Ephemeral green or red seaweeds (freshwater or sand-influenced) on non-mobile substrata | same |
EUNIS Habitat Classification 200308 | A1.24 | Ephemeral green or red seaweeds (freshwater- or sand-influenced) on moderately exposed littoral rock | wider |
EUNIS Habitat Classification 200202 | A1.24 | Ephemeral green or red seaweeds (freshwater- or sand-influenced) on moderately exposed littoral rock | overlap |
EUNIS Habitat Classification 199910 | A1.23 | Ephemeral green or red seaweeds (freshwater- or sand-influenced) on moderately exposed littoral rock | overlap |
EUNIS Habitat Classification 199811 | A1.23 | Green or red ephemeral seaweeds (sand- or freshwater-influenced) | overlap |
EUNIS Habitat Classification 199712 | A1.33 | Green or red ephemeral seaweeds (sand- or freshwater-influenced) | overlap |
MNCR BioMar 97.06 (Britain & Ireland) | MLR.Eph | Ephemeral green or red seaweeds (freshwater- or sand-influenced) | overlap |
MNCR BioMar 96.7 (Britain & Ireland) | MLR.GR | overlap |