Oligochaetes in littoral mobile sand

English name: Oligochaetes in littoral mobile sand

Quick facts

EUNIS habitat type code A2.222
Bern Convention Included in a Resolution 4 habitat type at a higher level (A2.2)

Description (English)

A species-poor community of oligochaetes occurring in estuarine conditions where sands and gravel are associated with the lower shore river channel in estuaries. The sediment is relatively coarse and mobile due to strong river flow and subject to variable salinity. The biotope also occurs in fully marine conditions on open shores with mobile, medium to fine, usually clean, sand. Oligochaetes, including enchytraeid oligochaetes, constitute the infaunal assemblage. This biotope has been split into two sub-biotopes, based on the physical environment (a full-salinity and a variable salinity type).
Situation: This unit often occurs in variable salinity conditions, in channels of very fast flowing river mouths at the bottom of otherwise sheltered estuarine shores. In this situation, biotopes under the A2.31 and A2.32 biotope complexes may be present above the river channel. A2.222 also occurs on open, fully marine shores. Where it is situated on the mid shore, units A2.111 and/or A2.221 may be present on the upper shore, and lower down on the shore, A2.2231 and A2.2233 may be found. A2.222 may also occur on the upper shore, with A2.2232 present on the mid shore, and A2.2311 or A2.2312 on the lower shore. A2.211may be found on the upper shore where driftlines of wracks and debris accumulate.
Temporal variation: Wave exposure may be higher on some beaches during winter than during the summer months, leading to the disappearance of infaunal species in winter. Where this happens, the biotope may change to unit A2.221. If conditions become more sheltered, seasonally or permanently, the sediment may become colonised by a greater range of species and the area may change to A2.223.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Not available

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LS.LSa.MoSa.Ol Oligochaetes in littoral mobile sand source
CORINE Land Cover 5.2.2. Estuaries n/a
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 A2.222 Oligochaetes in littoral mobile sand same
EUNIS Habitat Classification 200308 A2.243 Burrowing amphipods and Eurydice pulchra in well-drained clean sand shores overlap
EUNIS Habitat Classification 200308 A2.242 Barren coarse sand shores overlap
EUNIS Habitat Classification 200308 A2.121 Oligochaetes in reduced or low salinity gravel or coarse sand shores overlap
EUNIS Habitat Classification 200202 A2.121 Oligochaetes in reduced or low salinity gravel or coarse sand shores overlap
EUNIS Habitat Classification 200202 A2.243 Burrowing amphipods and Eurydice pulchra in well-drained clean sand shores overlap
EUNIS Habitat Classification 200202 A2.242 Barren coarse sand shores overlap
EUNIS Habitat Classification 199910 A2.121 Oligochaetes in reduced or low salinity gravel or coarse sand shores overlap
EUNIS Habitat Classification 199910 A2.213 Burrowing amphipods and Eurydice pulchra in well-drained clean sand shores overlap
EUNIS Habitat Classification 199910 A2.212 Barren coarse sand shores overlap
MNCR BioMar 97.06 (Britain & Ireland) LGS.S.BarSnd Barren coarse sand shores overlap
MNCR BioMar 97.06 (Britain & Ireland) LGS.Est.Ol Oligochaetes in reduced or low salinity gravel or coarse sand shores overlap
MNCR BioMar 97.06 (Britain & Ireland) LGS.S.AEur Burrowing amphipods and Eurydice pulchra in well-drained clean sand shores overlap
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