EUNIS habitat classification 2017 > M - Marine benthic habitats > MD3 - Offshore circalittoral coarse sediment > MD32 - Atlantic offshore circalittoral coarse sediment > MD321 - Faunal communities in Atlantic offshore circalittoral coarse sediment

Faunal communities in Atlantic offshore circalittoral coarse sediment

Description (English)

Offshore (deep) circalittoral habitats with coarse sands and gravel or shell. This habitat may cover large areas of the offshore continental shelf although there is relatively little quantitative data available. Such habitats are quite diverse compared to shallower versions of this habitat and generally characterised by robust infaunal polychaete and bivalve species. Animal communities in this habitat are closely related to offshore mixed sediments and in some areas settlement of Modiolus modiolus larvae may occur and consequently these habitats may occasionally have large numbers of juvenile M. modiolus. In areas where the mussels reach maturity their byssus threads bind the sediment together, increasing stability and allowing an increased deposition of silt leading to the development of the biotope MC2-222.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MD321

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Modiolus modiolus
Species scientific name English common name Species group
Modiolus modiolus Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A5.15 Deep circalittoral coarse sediment narrower
European Red List of Habitats NEAA5.15 Atlantic lower circalittoral coarse sediment wider
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A5.14 Deep circalittoral coarse sediment same
EUNIS Habitat Classification 200308 A4.14 Animals communities in deeper coarse sands narrower
EUNIS Habitat Classification 200308 A4.73 Animal communities of deep circalittoral shell gravel bottoms narrower
EUNIS Habitat Classification 200308 A4.71 Animal communities of deep circalittoral gravel bottoms narrower
EUNIS Habitat Classification 200202 A4.71 Animal communities of deep circalittoral gravel bottoms narrower
EUNIS Habitat Classification 200202 A4.14 Animals communities in deeper coarse sands narrower
EUNIS Habitat Classification 200202 A4.73 Animal communities of deep circalittoral shell gravel bottoms narrower
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