EUNIS habitat classification 2017 > M - Marine benthic habitats > MA1 - Littoral rock > MA12 - Atlantic littoral rock > MA126 - Communities of Atlantic littoral rockpools > MA1261 - Green seaweeds (Enteromorpha spp. and Cladophora spp.) in shallow upper shore rockpools

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 MA1261
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 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

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A1.421 Green seaweeds (Enteromorpha spp. and Cladophora spp.) in shallow upper shore rockpools same
EUNIS Habitat Classification 200410 A1.42 Communities of rockpools in the supralittoral zone same
EUNIS Habitat Classification 200308 A1.52 Communities of rockpools in the supralittoral zone 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 200202 A1.52 Communities of rockpools in the supralittoral zone same
EUNIS Habitat Classification 199910 A1.521 Green seaweeds (Enteromorpha spp. and Cladophora spp.) in upper shore rockpools same
EUNIS Habitat Classification 199910 A1.52 Communities of rockpools in the supralittoral zone same
EUNIS Habitat Classification 199811 B3.12 Supralittoral rockpools same
EUNIS Habitat Classification 199712 A1.13 Supralittoral rock pools same
Palaearctic Habitat Classification 199905 11.297 Supralittoral rock pools same
Palaearctic Habitat Classification 1997 11.297 Supralittoral rock pools same
Palaearctic Habitat Classification 1996 11.297   same
Palaearctic Habitat Classification 1993 11.297   same
CORINE Biotopes Classification 1991 18.17   same
MNCR BioMar 97.06 (Britain & Ireland) LR.Rkp.G Green seaweeds (Enteromorpha spp. and Caldophora spp.) in upper shore rockpools same
MNCR BioMar 96.7 (Britain & Ireland) RKP   narrower
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