EUNIS habitat classification 2017 > M - Marine benthic habitats > MA6 - Littoral mud > MA62 - Atlantic littoral mud > MA623 - Seagrass beds on Atlantic littoral mud

Seagrass beds on Atlantic littoral mud

Description (English)

Mid and upper shore wave-sheltered muddy fine sand or sandy mud can have high densities of Zostera noltei (formerly known as Z.noltii or Z.nana) and/or Z.marina. Z.noltei forms stands with a cover of delicate trailing narrow leaves up to about 20 cm long. It survives the winter as rhizomes, therefore the locations remain stable over many years. It may occur monospecific, or with Z. marina or Ruppia spp. and occasional plants of lower salt-marsh species such as annual Salicornia spp. or Spartina anglica, as stands of Z. noltei may not only pass downshore to Z. marina but also to communities of the lower saltmarsh.
There may be seasonal variation in the area covered by intertidal seagrass beds, as plants die back in winter. Intertidal seagrass beds may also be subject to heavy grazing by geese, which can reduce the extent of the plant cover significantly. The rhizomes of Z.noltei will remain in place within the sediment in both situations and plants towards the lower limit may remain winter-green.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MA623
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

Flowering Plants Spartina anglica
Species scientific name English common name Species group
Spartina anglica Flowering Plants

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A2.61 Seagrass beds on littoral sediments narrower
European Red List of Habitats NEAA2.61 Seagrass beds on Atlantic littoral sediments narrower
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A2.61 Seagrass beds on littoral sediments same
EUNIS Habitat Classification 200308 A2.71 Zostera beds on littoral sediments narrower
EUNIS Habitat Classification 200308 A2.73 Ruppia beds on littoral sediments narrower
EUNIS Habitat Classification 200202 A2.73 Ruppia beds on littoral sediments narrower
EUNIS Habitat Classification 200202 A2.71 Zostera beds on littoral sediments narrower
EUNIS Habitat Classification 199910 A2.73 Ruppia beds on littoral sediments narrower
EUNIS Habitat Classification 199910 A2.71 Zostera beds on littoral sediments narrower
EUNIS Habitat Classification 199811 A2.71 Zostera beds on littoral muddy sands narrower
EUNIS Habitat Classification 199712 A2.22 Eelgrass Zostera beds on littoral muddy sands narrower
Palaearctic Habitat Classification 199905 11.31 Atlantic eelgrass meadows narrower
Palaearctic Habitat Classification 199905 11.32 Atlantic dwarf eelgrass meadows narrower
Palaearctic Habitat Classification 1997 11.32 Atlantic dwarf eelgrass meadows wider
Palaearctic Habitat Classification 1997 11.31 Atlantic eelgrass meadows wider
Palaearctic Habitat Classification 1996 11.32   narrower
Palaearctic Habitat Classification 1996 11.31   narrower
Palaearctic Habitat Classification 1993 11.31   narrower
Palaearctic Habitat Classification 1993 11.32   narrower
CORINE Biotopes Classification 1991 11.32   narrower
CORINE Biotopes Classification 1991 11.31   narrower
CORINE Biotopes Classification 1989 11.32   narrower
CORINE Biotopes Classification 1989 11.31   narrower
MNCR BioMar 97.06 (Britain & Ireland) LMS.Zos Littoral Zostera (seagrass) beds narrower
MNCR BioMar 96.7 (Britain & Ireland) LMS.PCer.Znol   narrower
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