Palmaria palmata on very exposed to moderately exposed lower eulittoral rock
Very exposed to moderately exposed lower eulittoral rock which supports a pure stand of dulse Palmaria palmata as a dense band or in large patches above the main kelp zone. P. palmata favours shaded or overhanging rock and often forms a band at the top of overhanging rock. Relatively low abundance of other seaweeds, such as the red seaweed Porphyra umbilicalis or the green seaweeds Enteromorpha intestinalis, Ulva lactuca and Cladophora rupestris may also occur in this biotope although P. palmata always dominates. On the rock underneath the seaweed turf are the barnacle Semibalanus balanoides and the limpet Patella vulgata and the olive-green lichen Verrucaria mucosa. Sites should only be recorded as MA1-234 where P. palmata forms a distinct band or occurs in large patches on the shore.
Situation: This biotope is found below the biotopes dominated by the P. vulgata, S. balanoides, the wrack Fucus distichus or E. intestinalis (MA1-223; MA1-231; MA1-23G). It is found above biotopes dominated by the kelp Alaria esculenta and Laminaria digitata (MB1-2112; MB1-2171).
Temporal variation: It is likely that the P. palmata biotope represents an opportunistic assemblage of fast-growing species which occupy gaps within or between the canopies of long lived perennials such as the wrack Fucus serratus.
Source: EUNIS habitat classification
|EUNIS habitat type||code MA1234|
|Relation to||Resolution 4 habitat type (used for designation of Emerald sites)|
Relation to other habitat types mentioned in legal instruments
Relation to vegetation types (syntaxa)Not available
Species mentioned in habitat description
|Species scientific name||English common name||Species group|
|Classification||Code||Habitat type name||Relationship type|
|EUNIS Habitat Classification 2007 (revised descriptions 2012)||A1.124||Palmaria palmata on very exposed to moderately exposed lower eulittoral rock||same|
|Classification||Code||Habitat type name||Relationship type||Comment|
|EUNIS Habitat Classification 200410||A1.124||Palmaria palmata on very exposed to moderately exposed lower eulittoral rock||same|
|EUNIS Habitat Classification 200308||A1.232||Palmaria palmata on very exposed to moderately exposed lower eulittoral rock||same|
|EUNIS Habitat Classification 200202||A1.232||Palmaria palmata on very to moderately exposed lower eulittoral rock||same|
|EUNIS Habitat Classification 199910||A1.222||Palmaria palmata on very to moderately exposed lower eulittoral rock||same|
|MNCR BioMar 97.06 (Britain & Ireland)||MLR.R.Pal||Palmaria palmata on very to moderately exposed lower eulittoral rock||same|