EUNIS habitat classification 2017 > M - Marine benthic habitats > MB6 - Infralittoral mud > MB62 - Atlantic infralittoral mud > MB625 - Faunal communities on variable or reduced salinity Atlantic sublittoral mud > MB6251 - Polydora ciliata and Corophium volutator in variable salinity infralittoral firm mud or clay

Polydora ciliata and Corophium volutator in variable salinity infralittoral firm mud or clay

Description (English)

Variable salinity clay and firm mud characterised by a turf of the polychaete Polydora ciliata along with the amphipod Corophium volutator. Other important taxa include the polychaetes Pygospio elegans, Hediste diversicolor, Streblospio shrubsolii and the oligochaete Tubificoides benedii. P. ciliata also occurs in high densities elsewhere (see unit A4.232) and may be a specific feature of the Humber Estuary in these conditions. This biotope occurs only in very firm mud and clay and possibly submerged relict saltmarsh with a high detrital content. It is characterised, and can be separated from other biotopes, by a combination of the sediment characteristics and the very high density of Polydora ciliata. In some areas, such as the Humber estuary, cyclical behaviour with regard its characteristic taxa has been reported with either P. ciliata or C. volutator increasing in dominance at the expense of the other (Gameson 1982). It is possible that changes in water quality or the sediment regime may be responsible for this.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MB6251
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Corophium volutator
Invertebrates Polydora ciliata
Invertebrates Pygospio elegans
Invertebrates Streblospio shrubsolii
Species scientific name English common name Species group
Corophium volutator Invertebrates
Polydora ciliata Invertebrates
Pygospio elegans Invertebrates
Streblospio shrubsolii Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A5.321 Polydora ciliata and Corophium volutator in variable salinity infralittoral firm mud or clay same
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A5.321 Polydora ciliata and Corophium volutator in variable salinity infralittoral firm mud or clay same
EUNIS Habitat Classification 200308 A4.321 Polydora ciliata and Corophium volutator in variable salinity infralittoral firm mud or clay same
EUNIS Habitat Classification 200202 A4.321 Polydora ciliata in variable salinity infralittoral firm mud or clay same
EUNIS Habitat Classification 199910 A4.321 Polydora ciliata in variable salinity infralittoral firm mud or clay same
MNCR BioMar 97.06 (Britain & Ireland) IMU.EstMu.PolVS Polydora ciliata in variable salinity infralittoral firm mud or clay same
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