Sandy beach ridges may be bare or may host pioneer communities of the class Ammophiletea consisting mainly of geophytes and hemicryptophytes, e.g. the association Agropyrion juncei-Sporoboletum pungentis. They may sporadically be inundated by sea water during storms. The vegetation may be ammonitrophilous, of the class Cakiletea maritimae, enriched by many Ammophiletea species like Echinophora spinosa, Elymus farctus, Eryngium maritimum.