EUNIS habitat classification 2017 > M - Marine benthic habitats > MB5 - Infralittoral sand > MB52 - Atlantic infralittoral sand > MB523 - Faunal communities of full salinity Atlantic infralittoral sand > MB5232 - Sertularia cupressina and Hydrallmania falcata on tide-swept Atlantic infralittoral sand with cobbles or pebbles

Sertularia cupressina and Hydrallmania falcata on tide-swept Atlantic infralittoral sand with cobbles or pebbles

Description (English)

Shallow sands with cobbles and pebbles, exposed to strong tidal streams, with conspicuous colonies of hydroids, particularly Hydrallmania falcata and to a lesser extent Sertularia cupressina and S. argentea. These hydroids are tolerant to periodic submergence and scour by sand. Both diving and dredge surveys will easily record this biotope. Flustra foliacea, Balanus crenatus and Alcyonidium diaphanum may also occur on the more stable cobbles and pebbles, with Urticina felina and occasional Lanice conchilega present in the sand. Infaunal components of the other biotopes of sublittoral sand or coarse sediments may occur in this biotope as may elements of the 'Venus' associations; indeed, this biotope may be at one extreme of the spectrum of such associations (E.I.S. Rees pers. comm. 1997) and this biotope may be best considered an epibiotic overlay.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MB5232
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

Invertebrates Alcyonidium diaphanum
Invertebrates Balanus crenatus
Invertebrates Flustra foliacea
Invertebrates Hydrallmania falcata
Invertebrates Lanice conchilega
Invertebrates Sertularia cupressina
Invertebrates Urticina felina
Species scientific name English common name Species group
Alcyonidium diaphanum Invertebrates
Balanus crenatus Invertebrates
Flustra foliacea Invertebrates
Hydrallmania falcata Invertebrates
Lanice conchilega Invertebrates
Sertularia cupressina Invertebrates
Urticina felina Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A5.232 Sertularia cupressina and Hydrallmania falcata on tide-swept sublittoral sand with cobbles or pebbles same
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A5.232 Sertularia cupressina and Hydrallmania falcata on tide-swept sublittoral sand with cobbles or pebbles same
EUNIS Habitat Classification 200308 A4.122 Sertularia cupressina and Hydrallmania falcata on tide-swept sublittoral sand with cobbles or pebbles same
EUNIS Habitat Classification 200202 A4.122 Sertularia cupressina and Hydrallmania falcata on tide-swept sublittoral cobbles or pebbles in coarse sand same
EUNIS Habitat Classification 199910 A4.132 Sertularia cupressina and Hydrallmania falcata on tide-swept sublittoral cobbles or pebbles in coarse sand same
MNCR BioMar 97.06 (Britain & Ireland) IGS.FaS.ScupHyd Sertularia cupressina and Hydrallmania falcata on tide-swept sublittoral sublittoral cobbles or pebbles in coarse sand same
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