Enteromorpha spp. on freshwater-influenced and/or unstable upper eulittoral rock

English name: Enteromorpha spp. on freshwater-influenced and/or unstable upper eulittoral rock

Description (English)

Upper shore hard substratum that is relatively unstable (e.g. soft rock) or subject to considerable freshwater runoff is typically very species poor and characterised by a dense mat of Enteromorpha spp., though Ulva lactuca can occur as well. It occurs in a wider zone spanning from the supralittoral down to the upper eulittoral, across a wide range of wave exposures range. This biotope is generally devoid of fauna, except for occasional limpets Patella vulgata, winkles Littorina littorea or Littorina saxatilis and barnacles Semibalanus balanoides.
Situation: This band of green seaweeds is usually found above a zone dominated by a mixture Enteromorpha spp. and Porphyra spp. (unit A1.452) or a Fucus spiralis or Fucus ceranoides zone (units A1.312; A1.327), and may replace the Pelvetia canaliculata zone (A1.211). It can be found below a zone dominated by yellow and grey lichens. In very sheltered areas the seagrass Ruppia maritima can be found above this biotope while different wracks such as Fucus spp. can dominate the zone below (A5.5343; A1.314; A1.312).
Temporal variation: Seasonal fluctuations in the abundance of the Enteromorpha spp. and the occurrence of the other green seaweeds species will occur.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A1.451

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Fucus ceranoides
Algae Fucus spiralis
Invertebrates Littorina littorea
Invertebrates Littorina saxatilis
Invertebrates Patella vulgata
Algae Pelvetia canaliculata
Flowering Plants Ruppia maritima
Invertebrates Semibalanus balanoides
Algae Ulva lactuca
Species scientific name English common name Species group
Fucus ceranoides Algae
Fucus spiralis Algae
Littorina littorea Invertebrates
Littorina saxatilis Invertebrates
Patella vulgata Invertebrates
Pelvetia canaliculata Algae
Ruppia maritima Flowering Plants
Semibalanus balanoides Invertebrates
Ulva lactuca Algae

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.FLR.Eph.Ent <I>Enteromorpha</I> spp. on freshwater-influenced and/or unstable upper 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 A1.451 Enteromorpha spp. on freshwater-influenced and/or unstable upper eulittoral rock same
EUNIS Habitat Classification 200308 A1.241 Enteromorpha spp. on freshwater-influenced or unstable upper eulittoral rock same
EUNIS Habitat Classification 200202 A1.241 Enteromorpha spp. on freshwater-influenced or unstable upper eulittoral rock same
EUNIS Habitat Classification 199910 A1.231 Enteromorpha spp. on freshwater-influenced or unstable upper eulittoral rock same
MNCR BioMar 97.06 (Britain & Ireland) MLR.Eph.Ent Enteromorpha spp. on freshwater-influenced or unstable upper eulittoral rock same
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