Audouinella purpurea and Pilinia maritima crusts on upper and mid-shore cave walls and ceilings
Golden brown velvety growths of the brown algae Pilinia maritima occurring in mats with the red alga Audouinella purpurea forming on cave walls and upper littoral levels of cliffs. Fauna is sparse and limited to occasional individuals of the winkle Littorina saxatilis and spirorbid polychaetes. This assemblage is thought to be is widespread throughout Britain, although there are currently few records available. More information are needed to validate this description, which is based on information from the Thanet intertidal survey (Tittley & Spurrier 2001).
Situation: This biotope is found at the entrances and the inner reaches of caves between a band of unit MA1-274 and the MA1-272 zone above.
Temporal variation: Some variation in the species composition of the individual caves must be expected depending on local conditions.
Source: EUNIS habitat classification
|EUNIS habitat type||code MA1273|
|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)||A1.443||Audouinella purpurea and Pilinia maritima crusts on upper and mid-shore cave walls and ceilings||same|
|Classification||Code||Habitat type name||Relationship type||Comment|
|EUNIS Habitat Classification 200410||A1.443||Audouinella purpurea and Pilinia maritima crusts on upper and mid-shore cave walls and ceilings||same|