EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A1 - Littoral rock and other hard substrata > A1.4 - Features of littoral rock > A1.44 - Communities of littoral caves and overhangs > A1.441 - Chrysophyceae and Haptophyceae on vertical upper littoral fringe soft rock

Chrysophyceae and Haptophyceae on vertical upper littoral fringe soft rock

English name: Chrysophyceae and Haptophyceae on vertical upper littoral fringe soft rock

Description (English)

Orange, brownish or blackish gelatinous bands of algae at high tide and supralittoral levels on open cliff faces and on upper walls and ceilings at entrances and to the rear of upper and mid-shore hard and soft rock (chalk) caves. This dark brown band consists of an assemblage of Haptophyceae such as Apistonema spp., Pleurochrysis carterae and the orange Chrysotila lamellosa, but other genera and species of Chrysophyceae, Haptophyceae and Prasinophyceae are likely to be present as well. Species such as Entodesmis maritima and Thallochrysis littoralis and the filamentous green alga Epicladia perforans are often associated with Apistonema spp. and the latter can form a green layer beneath the Apistonema spp. Associated with this splash zone algal community is an assemblage of animals of terrestrial origin, with red mites, insects and centipedes commonly found. These species descend into the community as the tide falls and retreat as the tide rises. The most common truly 'marine' species is the small winkle Melarhaphe neritoides.
Situation: This description is partly based on a Thanet intertidal survey (Tittley & Spurrier 2001). More information is needed to identify the species composition and dominant species of this biotope.
Temporal variation: During summer the gelatinous growth dries and often peels off.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A1.441
Bern Convention Included in a Resolution 4 habitat type at a higher level (A1.44)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Epicladia perforans
Invertebrates Melarhaphe neritoides
Species scientific name English common name Species group
Epicladia perforans Algae
Melarhaphe neritoides Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.FLR.CvOv.ChrHap Chrysophyceae and Haptophyceae on vertical upper littoral fringe soft rock source
CORINE Land Cover 3.3.2. Bare rock n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A1.441 Chrysophyceae and Haptophyceae on vertical upper littoral fringe soft rock same
EUNIS Habitat Classification 200308 B3.114 Chrysophyceae and Haptophyceae on vertical upper littoral fringe soft rock same
EUNIS Habitat Classification 200202 B3.114 Chrysophyceae on vertical upper littoral fringe soft rock same
EUNIS Habitat Classification 199910 B3.114 Chrysophyceae on vertical upper littoral fringe soft rock same
MNCR BioMar 97.06 (Britain & Ireland) LR.L.Chr Chrysophyceae on vertical upper littoral fringe soft rock same
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