Platforms with coralline algae (Lithophyllum concretions)
These platforms develop on rocky calcareous, volcanic or crystalline substrates which are regularly wetted by tides and waves.
It is therefore the highest biological construction of the benthic realm at sea level. When the water is calm, the rims emerge completely and their outer margins may be as much as 20-30 centimetres above the water.
This condition is made possible by the combined action of two factors which allow the maintaining of the correct degree of moisture: exposure to waves, and the porous nature of the calcareous structure. The height above mean sea level varies according to the force of waves and/or the presence of cracks and clefts which are vulnerable to storms off the coast.
Source: EUNIS habitat classification
|EUNIS habitat type||code MA2552|
|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
|Classification||Code||Habitat type name||Relationship type|
|EUNIS Habitat Classification 2007 (revised descriptions 2012)||A2.7||Littoral biogenic reefs||narrower|