N1-234 - Faciès des phanérogames échouées (partie supérieure)

Facies of phanerogams which have been washed ashore (upper part)

Classification des habitats EUNIS 2022

Descriptif de l'habitat

On sandy beaches, in the supralittoral stage, at a higher level, rarely submerged, in the whole of the Mediterranean. Present on the upper beach, only humectated by the sea during storms. The temperature is highly variable and the daily differences in temperature may be more than 20°C. These temperatures may be extremely high, reaching 50°C in the summer, and are then lethal for individuals living in the sand. This facies is a relatively particular aspect of ‘wracks’ and corresponds to the washing up of almost exclusively marine phanerogam debris from nearby meadows and beds. These wracks always include a fairly sizeable part of other additional elements of anthropic or natural origin. The sediment of the upper beach ranges from shifting sand on compact sand to the presence of more or less damp saline plaques on coarse sand. The sedimentary granulometry varies according to the addition of fine elements.

Bibliographie

 European Topic Centre on Biological Diversity, 2021. EUNIS terrestrial habitat classification 2021 including crosswalks. ETC/BD-EEA. Table Excel transmise par S. Hennekens (Alterra) le 14/02/2022. (Source)