EUNIS habitat classification 2017 > M - Marine benthic habitats > MB5 - Infralittoral sand > MB52 - Atlantic infralittoral sand > MB523 - Faunal communities of full salinity Atlantic infralittoral sand > MB5236 - Fabulina fabula and Magelona mirabilis with venerid bivalves and amphipods in Atlantic infralittoral compacted fine muddy sand

Fabulina fabula and Magelona mirabilis with venerid bivalves and amphipods in Atlantic infralittoral compacted fine muddy sand

Quick facts

EUNIS habitat type code MB5236
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Description (English)

In stable, fine, compacted sands and slightly muddy sands in the infralittoral and littoral fringe, communities occur that are dominated by venerid bivalves such as Chamelea gallina. This biotope may be characterised by a prevalence of Fabulina fabula and Magelona mirabilis or other species of Magelona (e.g. M. filiformis). Other taxa, including the amphipod Bathyporeia spp. and polychaetes such as Chaetozone setosa, Spiophanes bombyx and Nephtys spp. are also commonly recorded. In some areas the bivalve Spisula elliptica may also occur in this biotope in low numbers. The community is relatively stable in its species composition, however, numbers of Magelona and F. Fabulina tend to fluctuate. Around the Scilly Isles numbers of F. fabulina in this biotope are uncommonly low whilst these taxa are often found in higher abundances in muddier communities (presumably due to the higher organic content). Consequently it may be better to revise this biotope on the basis of less ubiquitous taxa such as key amphipod species (E.I.S. Rees pers. comm. 2002) although more data is required to test this. MB5-236 and MB3-233 are collectively considered to be the 'shallow Venus community' or 'boreal off-shore sand association' of previous workers (see Petersen 1918; Jones 1950; Thorson 1957). These communities have been shown to correlate well with particular levels of current induced 'bed-stress' (Warwick & Uncles 1980). The 'Arctic Venus Community' and 'Mediterranean Venus Community' described to the north and south of the UK (Thorson 1957) probably occur in the same habitat and appears to be the same biotope described as the Ophelia borealis community in northern France and the central North Sea (K

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Chaetozone setosa
Invertebrates Chamelea gallina
Invertebrates Magelona mirabilis
Invertebrates Spiophanes bombyx
Species scientific name English common name Species group
Chaetozone setosa Invertebrates
Chamelea gallina Invertebrates
Magelona mirabilis Invertebrates
Spiophanes bombyx Invertebrates

Other classifications

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A5.242 Fabulina fabula and Magelona mirabilis with venerid bivalves and amphipods in infralittoral compacted fine muddy sand same
EUNIS Habitat Classification 200308 A5.242 Spio filicornis and Spiophanes bombyx infralittoral clean or muddy sand overlap
EUNIS Habitat Classification 200308 A4.212 Fabulina fabula and Magelona mirabilis with venerid bivalves and amphipods in infralittoral compacted fine muddy sand same
EUNIS Habitat Classification 200202 A4.252 Spio filicornis and Spiophanes bombyx infralittoral clean or muddy sand narrower
EUNIS Habitat Classification 200202 A4.212 Fabulina fabula and Magelona mirabilis with venerid bivalves in shallow-water compacted fine sand narrower
EUNIS Habitat Classification 199910 A4.212 Fabulina fabula and Magelona mirabilis with venerid bivalves in shallow-water compacted fine sand narrower
EUNIS Habitat Classification 199910 A4.262 Spio filicornis and Spiophanes bombyx infralittoral clean or muddy sand narrower
MNCR BioMar 97.06 (Britain & Ireland) IGS.FaS.FabMag Fabulina fabula and Magelona mirabilis with venerid bivalves in infralittoral compacted fine sand narrower
MNCR BioMar 97.06 (Britain & Ireland) IMS.FaMS.SpiSpi Spio filicornis and Spiophanes bombyx infralittoral clean or muddy sand narrower
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