EUNIS habitat classification 2017 > M - Marine benthic habitats > MA1 - Littoral rock > MA12 - Atlantic littoral rock > MA126 - Communities of Atlantic littoral rockpools > MA1265 - Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools

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 MA2-2711), 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 MA1265
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 Chondrus crispus
Fishes Pomatoschistus minutus
Invertebrates Arenicola marina
Invertebrates Crangon crangon
Invertebrates Elminius modestus
Invertebrates Lanice conchilega
Invertebrates Mytilus edulis
Invertebrates Pomatoceros triqueter
Invertebrates Semibalanus balanoides
Invertebrates Thuiaria thuja
Species scientific name English common name Species group
Chondrus crispus Algae
Pomatoschistus minutus Common goby Fishes
Arenicola marina Invertebrates
Crangon crangon Invertebrates
Elminius modestus Invertebrates
Lanice conchilega Invertebrates
Mytilus edulis Invertebrates
Pomatoceros triqueter Invertebrates
Semibalanus balanoides Invertebrates
Thuiaria thuja Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A1.414 Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools same
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
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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