EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A1 - Littoral rock and other hard substrata > A1.4 - Features of littoral rock > A1.42 - Communities of rockpools in the supralittoral zone > A1.421 - Green seaweeds (Enteromorpha spp. and Cladophora spp.) in shallow upper shore rockpools

Green seaweeds (Enteromorpha spp. and Cladophora spp.) in shallow upper shore rockpools

English name: Green seaweeds (Enteromorpha spp. and Cladophora spp.) in shallow upper shore rockpools

Description (English)

Rockpools in the littoral fringe or upper eulittoral zone subject to widely fluctuating temperatures and salinity are characterised by ephemeral green alga of the genus Enteromorpha, along with Cladophora spp. and Ulva lactuca. Due to the physical stress imposed on these upper shore pools, grazing molluscs such as the limpet Patella vulgata and the winkles Littorina littorea and Littorina saxatilis are generally in lower abundance than eulittoral pools, allowing the green seaweeds to proliferate under reduced grazing pressures. The bright orange copepod Tigriopus fulvus is tolerant of large salinity fluctuations and may occur in large numbers in these upper shore pools, along with gammarid amphipods.
Situation: Rockpools throughout the upper eulittoral and lower littoral fringe in bedrock.
Temporal variation: Fluctuations especially in the abundance of the green seaweeds will occur due to marked changes in salinity and temperature during the year. Enteromorpha intestinalis can often be bleached during the summer.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A1.421

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Enteromorpha intestinalis
Algae Ulva lactuca
Invertebrates Littorina littorea
Invertebrates Littorina saxatilis
Invertebrates Patella vulgata
Invertebrates Tigriopus fulvus
Species scientific name English common name Species group
Enteromorpha intestinalis Algae
Ulva lactuca Algae
Littorina littorea Invertebrates
Littorina saxatilis Invertebrates
Patella vulgata Invertebrates
Tigriopus fulvus Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.FLR.Rkp.G Green seaweeds (<I>Enteromorpha</I> spp. and <I>Cladophora</I> spp.) in shallow upper shore rockpools source
CORINE Land Cover 4.2.3. Intertidal flats n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A1.421 Green seaweeds (Enteromorpha spp. and Cladophora spp.) in shallow upper shore rockpools same
EUNIS Habitat Classification 200308 A1.521 Green seaweeds (Enteromorpha spp. and Cladophora spp.) in upper shore rockpools same
EUNIS Habitat Classification 200202 A1.521 Green seaweeds (Enteromorpha spp. and Cladophora spp.) in upper shore rockpools same
EUNIS Habitat Classification 199910 A1.521 Green seaweeds (Enteromorpha spp. and Cladophora spp.) in upper shore rockpools same
MNCR BioMar 97.06 (Britain & Ireland) LR.Rkp.G Green seaweeds (Enteromorpha spp. and Caldophora spp.) in upper shore rockpools same
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100