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 availableSpecies mentioned in habitat description
Species scientific name | English common name | Species group |
---|---|---|
Cerastoderma edule | Invertebrates | |
Eumida sanguinea | Invertebrates | |
Lanice conchilega | Invertebrates | |
Macoma balthica | Invertebrates | |
Nephtys hombergii | 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 |
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 |