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.

Código Eunis 2021: MA2552