EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A1 - Littoral rock and other hard substrata > A1.4 - Features of littoral rock > A1.41 - Communities of littoral rockpools > A1.414 - Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools

Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools

English name: Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools

Description (English)

Shallow pools on mixed cobbles, pebbles, gravel and sand characterised by abundant hydroids. Species present may include Obelia geniculata, O. dichotoma, O. longissima, Sertularia cupressina, Tublaria indivisa and Thuiaria thuja. The difficulty in identifying hydroids suggests many more species may be also be present. Other species typically found in this biotope include ephemeral green algae (Enteromorpha spp. and Ulva sp.), red algae (Chondrus crispus and Coralline algae) and the winkle Littorina littorea. Within the pools, patches of sand may be occupied by the lugworm Arenicola marina and sand mason worms Lanice conchilega. These pools are often associated with mussel beds (unit A2.7211), with Mytilus edulis frequently recorded within the pools. Barnacles (Semibalanus balanoides and Elminius modestus) and the keel worm Pomatoceros triqueter may be attached to shells and small stones. Mobile species typical of rock pool habitats, such as Crangon crangon and Pomatoschistus minutus will also be found within the pool.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A1.414

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Arenicola marina
Algae Chondrus crispus
Invertebrates Crangon crangon
Invertebrates Elminius modestus
Invertebrates Lanice conchilega
Invertebrates Littorina littorea
Invertebrates Mytilus edulis
Invertebrates Obelia geniculata
Invertebrates Pomatoceros triqueter
Fishes Pomatoschistus minutus
Invertebrates Semibalanus balanoides
Invertebrates Sertularia cupressina
Invertebrates Thuiaria thuja
Species scientific name English common name Species group
Arenicola marina Invertebrates
Chondrus crispus Algae
Crangon crangon Invertebrates
Elminius modestus Invertebrates
Lanice conchilega Invertebrates
Littorina littorea Invertebrates
Mytilus edulis Invertebrates
Obelia geniculata Invertebrates
Pomatoceros triqueter Invertebrates
Pomatoschistus minutus Common goby Fishes
Semibalanus balanoides Invertebrates
Sertularia cupressina Invertebrates
Thuiaria thuja Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.FLR.Rkp.H Hydroids, ephemeral seaweeds and <I>Littorina littorea</I> in shallow eulittoral mixed substrata pools 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 A1.414 Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools same
EUNIS Habitat Classification 200308 A1.514 Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools same
EUNIS Habitat Classification 200202 A1.514 Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools same
EUNIS Habitat Classification 199910 A1.514 Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools same
EUNIS Habitat Classification 199811 A1.54 Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral pools same
MNCR BioMar 97.06 (Britain & Ireland) LR.Rkp.H Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools same
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