EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A5 - Sublittoral sediment > A5.3 - Sublittoral mud > A5.33 - Infralittoral sandy mud > A5.334 - Melinna palmata with Magelona spp. and Thyasira spp. in infralittoral sandy mud

Melinna palmata with Magelona spp. and Thyasira spp. in infralittoral sandy mud

English name: Melinna palmata with Magelona spp. and Thyasira spp. in infralittoral sandy mud

Description (English)

In infralittoral cohesive sandy mud, in sheltered marine inlets, and occasionally variable salinity environments, dense populations of the polychaete Melinna palmata may occur, often with high numbers of Magelona spp. and the bivalve Thyasira flexuosa. Other important taxa may include Chaetozone gibber, Nephtys hombergii, Galathowenia oculata, Euclymene oerstedii, Ampelisca tenuicornis, Ampharete lindstroemi, Abra alba, and Phoronis sp. In addition the polychaete Aphelochaeta spp. and the gastropod Turritella communis may be common or abundant in some areas. At the sediment surface visible taxa may include occasional Virgularia mirabilis, and mobile epifauna such as Pagurus bernhardus. This biotope is characteristic in many southern UK marine inlets and in some areas e.g. Plymouth Sound during high levels of recruitment when M. palmata often occurs in abundances between 500 to 1000 per m2 moderate numbers of the species often 'overspill' into adjacent biotopes (Allen et al. 2001).
Situation: In many areas this biotope is found on or near the boundary between euryhaline and polyhaline waters and in such areas moderately high numbers of Aphelochaeta spp. are often recorded.
Temporal variation: Numbers of M. palmata tend to vary considerably from year to year presumably due to recruitment and/or adult mortality.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A5.334
Bern Convention Included in a Resolution 4 habitat type at a higher level (A5)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Abra alba
Invertebrates Ampelisca tenuicornis
Invertebrates Ampharete lindstroemi
Invertebrates Chaetozone gibber
Invertebrates Melinna palmata
Invertebrates Nephtys hombergii
Invertebrates Pagurus bernhardus
Invertebrates Thyasira flexuosa
Invertebrates Turritella communis
Invertebrates Virgularia mirabilis
Species scientific name English common name Species group
Abra alba Invertebrates
Ampelisca tenuicornis Invertebrates
Ampharete lindstroemi Invertebrates
Chaetozone gibber Invertebrates
Melinna palmata Invertebrates
Nephtys hombergii Invertebrates
Pagurus bernhardus Invertebrates
Thyasira flexuosa Invertebrates
Turritella communis Invertebrates
Virgularia mirabilis Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 SS.SMu.ISaMu.MelMagThy <I>Melinna palmata</I> with <I>Magelona</I> spp. and <I>Thyasira</I> spp. in infralittoral sandy mud source
CORINE Land Cover 5.2.3. Sea and ocean n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A5.334 Melinna palmata with Magelona spp. and Thyasira spp. in infralittoral sandy mud same
EUNIS Habitat Classification 200308 A5.242 Spio filicornis and Spiophanes bombyx infralittoral clean or muddy sand wider
EUNIS Habitat Classification 200202 A4.252 Spio filicornis and Spiophanes bombyx infralittoral clean or muddy sand overlap
EUNIS Habitat Classification 199910 A4.262 Spio filicornis and Spiophanes bombyx infralittoral clean or muddy sand overlap
MNCR BioMar 97.06 (Britain & Ireland) IMS.FaMS.SpiSpi Spio filicornis and Spiophanes bombyx infralittoral clean or muddy sand overlap
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