Seaweeds in sediment-floored eulittoral rockpools

English name: Seaweeds in sediment-floored eulittoral rockpools

Quick facts

EUNIS habitat type code A1.413

Description (English)

Rockpools with sediment (mud, sand, gravel) floors support distinct communities of scour-tolerant seaweeds. Deep pools with sediment are similar to unit A1.412, and are typically dominated by fucoids and kelp (Fucus serratus, Laminaria digitata, Laminaria saccharina and Saccorhiza polyschides). Areas of hard substrata near to the interface with the sediment are, however, characterised by a range of sand-tolerant seaweeds such as Furcellaria lumbricalis, Polyides rotundus, Ahnfeltia plicata and Rhodochorton purpureum (compare with unit A1.412). Chorda filum may occur attached to pebbles and shells embedded within the sediment while the top shell Gibbula cineraria can be found underneath or among the pebbles. In pools with large areas of sand, infaunal species such as Arenicola marina and Lanice conchilega often occur. The seagrass Zostera spp. may occur in some pools where stable sand is present. Shallow rockpools with cobble and pebble floors, often with an underlying layer of sediment, support red algal tufts consisting of coralline crust, Corallina officinalis, Chondrus crispus, Mastocarpus stellatus mixed with Ceramium spp. and the green seaweeds Cladophora spp. and Enteromorpha intestinalis. The long list of characterising species is partly due to low similarity between the available records and care should be taken not to interpret this solely as a very high species richness.
Situation: Rockpools throughout the eulittoral zone in bedrock on exposed to sheltered shores.
Temporal variation: Seasonal fluctuations in the abundance of ephemeral seaweeds will occur.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Algae Ahnfeltia plicata
Algae Chondrus crispus
Algae Chorda filum
Algae Corallina officinalis
Algae Enteromorpha intestinalis
Algae Fucus serratus
Algae Furcellaria lumbricalis
Algae Laminaria digitata
Algae Laminaria saccharina
Algae Mastocarpus stellatus
Algae Polyides rotundus
Algae Rhodochorton purpureum
Algae Saccorhiza polyschides
Invertebrates Arenicola marina
Invertebrates Gibbula cineraria
Invertebrates Lanice conchilega
Species scientific name English common name Species group
Ahnfeltia plicata Algae
Chondrus crispus Algae
Chorda filum Algae
Corallina officinalis Algae
Enteromorpha intestinalis Algae
Fucus serratus Algae
Furcellaria lumbricalis Algae
Laminaria digitata Algae
Laminaria saccharina Algae
Mastocarpus stellatus Algae
Polyides rotundus Algae
Rhodochorton purpureum Algae
Saccorhiza polyschides Algae
Arenicola marina Invertebrates
Gibbula cineraria Invertebrates
Lanice conchilega Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LR.FLR.Rkp.SwSed Seaweeds in sediment-floored eulittoral 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 A1.413 Seaweeds in sediment-floored eulittoral rockpools same
EUNIS Habitat Classification 200308 A1.513 Seaweeds in sediment-floored eulittoral rockpools same
EUNIS Habitat Classification 200202 A1.513 Seaweeds in sediment-floored eulittoral rockpools same
EUNIS Habitat Classification 199910 A1.513 Seaweeds in sediment-floored eulittoral rockpools same
EUNIS Habitat Classification 199811 A1.53 Seaweeds in sediment-floored eulittoral rockpools same
MNCR BioMar 97.06 (Britain & Ireland) LR.Rkp.SwSed Seaweeds in sediment (sand or gravel)-floored eulittoral rockpools same
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