Lanice conchilega in littoral sand

English name: Lanice conchilega in littoral sand

Quick facts

EUNIS habitat type code A2.245
Bern Convention Included in a Resolution 4 habitat type at a higher level (A2.2)

Description (English)

This biotope usually occurs on flats of medium fine sand and muddy sand, most often on the lower shore but sometimes also on waterlogged mid shores. The sand may contain a proportion of shell fragments or gravel. Lan can also occur on the lower part of predominantly rocky or boulder shores, where patches of sand or muddy sand occur between scattered boulders, cobbles and pebbles. Conditions may be tide-swept, and the sediment may be mobile, but the biotope usually occurs in areas sheltered from strong wave action. The sediment supports dense populations of the sand mason Lanice conchilega. Other polychaetes present are tolerant of sand scour or mobility of the sediment surface layers and include the polychaetes Anaitides mucosa, Eumida sanguinea, Nephtys hombergii, Scoloplos armiger, Aricidea minuta, Tharyx spp. and Pygospio elegans. The mud shrimp Corophium arenarium and the cockle Cerastoderma edule may be abundant. The baltic tellin Macoma balthica may be present. On boulder shores, and where pebbles and cobbles are mixed in with lower shore tide-swept sand with dense L. conchilega between the cobbles, the infaunal component is rarely sampled. The infaunal community under these circumstances, provided that the cobbles are not packed very close together, is likely to be similar to that in areas without the coarse material.
Situation:This unit occurs mainly on the mid and lower shore of moderately exposed sand and muddy sand flats. Higher on the shore, other sand and muddy sand biotopes may be present, such as units A2.221 and A2.223 on the upper shore and the A2.231 communities on the mid shore. Unit A2.211 may occur where driftlines of wracks and other debris accumulate. Where Lan occurs on areas of scattered boulders and cobbles on the lower shore, there may be broad transition areas with A2.711 and other boulder shore biotopes.
Temporal variation: Where Lanice conchilega becomes very abundant, especially on the low shore, this can lead to the build up of sediment mounds around their tubes, thus leading to a significant alteration in the surface appearance of the biotope.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Aricidea minuta
Invertebrates Cerastoderma edule
Invertebrates Corophium arenarium
Invertebrates Eumida sanguinea
Invertebrates Lanice conchilega
Invertebrates Macoma balthica
Invertebrates Nephtys hombergii
Invertebrates Pygospio elegans
Invertebrates Scoloplos armiger
Species scientific name English common name Species group
Aricidea minuta Invertebrates
Cerastoderma edule Invertebrates
Corophium arenarium Invertebrates
Eumida sanguinea Invertebrates
Lanice conchilega Invertebrates
Macoma balthica Invertebrates
Nephtys hombergii Invertebrates
Pygospio elegans Invertebrates
Scoloplos armiger Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LS.LSa.MuSa.Lan <I>Lanice conchilega</I> in littoral sand 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 A2.245 Lanice conchilega in littoral sand same
EUNIS Habitat Classification 200308 A2.245 Lanice conchilega in littoral sand same
EUNIS Habitat Classification 200202 A2.245 Dense Lanice conchilega in tide-scoured lower shore sand same
EUNIS Habitat Classification 199910 A2.215 Dense Lanice conchilega in tide-scoured lower shore sand same
MNCR BioMar 97.06 (Britain & Ireland) LGS.S.Lan Dense Lanice conchilega in tide-scoured lower shore sand same
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