EUNIS habitat classification 2017 > M - Marine benthic habitats > MA1 - Littoral rock > MA12 - Atlantic littoral rock > MA121 - Lichens or small green algae on Atlantic supralittoral and littoral fringe rock > MA1215 - Ulothrix flacca and Urosporaspp. on freshwater-influenced vertical littoral fringe soft rock

Ulothrix flacca and Urosporaspp. on freshwater-influenced vertical littoral fringe soft rock

Description (English)

An assemblage of the small un-branched filamentous green seaweeds Ulothrix flacca, Urospora penicilliformis and Urospora wormskioldii at High Water Spring Tide level on steep and vertical rock often influenced by freshwater. The community is also present in areas with freshwater seepage. It is visually recognised as a closely adherent, often shiny, green mat of filamentous growth. Associated species include the green seaweeds Blidingia minima and Enteromorpha prolifera, the barnacle Semibalanus balanoides and the limpet Patella vulgata, but these species are not common. Although this biotope does occur on rock other than chalk, this description has been derived from chalk coast sites. More information is needed to improve this description.
Situation: On chalk coasts this community can include Enteromorpha spp. and the transition from MA1-215 to MA1-23G is often indistinct and a mixed zone of MA1-215 and MA1-23G can occur.
Temporal variation: This biotope is more easily identifiable from autumn to spring as both Urospora spp. and Bangia atropurpurea may dry out and disappear during the summer. In late winter the red seaweed B. atropurpurea may be predominant and the community then appears as shiny blackish mats of filamentous growth.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MA1215
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

Algae Blidingia minima
Algae Enteromorpha prolifera
Algae Ulothrix flacca
Algae Urospora penicilliformis
Algae Urospora wormskioldii
Invertebrates Patella vulgata
Species scientific name English common name Species group
Blidingia minima Algae
Enteromorpha prolifera Algae
Ulothrix flacca Algae
Urospora penicilliformis Algae
Urospora wormskioldii Algae
Patella vulgata Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) B3.115 Ulothrix flacca and Urospora spp. on freshwater-influenced vertical littoral fringe soft rock same
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 B3.115 Ulothrix flacca and Urospora spp. on freshwater-influenced vertical littoral fringe soft rock same
EUNIS Habitat Classification 200308 B3.116 Ulothrix flacca and Urospora spp. on freshwater-influenced vertical littoral fringe soft rock same
EUNIS Habitat Classification 200202 B3.116 Ulothrix flacca and Urospora spp. on freshwater-influenced vertical littoral fringe soft rock same
EUNIS Habitat Classification 199910 B3.116 Ulothrix flacca and Urospora spp. on freshwater-influenced vertical littoral fringe soft rock same
MNCR BioMar 97.06 (Britain & Ireland) LR.L.UloUro Ulothrix flacca and Urospora spp. on freshwater-influenced vertical littoral fringe soft rock same
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