Mobile dunes forming the seaward cordon or cordons of dune systems of the coasts of nemoral, steppe, Mediterranean and warm-temperate humid zones. Communities of Ammophilion arenariae, Ammophilion borealis, Zygophyllion fontanesii and several indicator species: Ammophila arenaria, Eryngium maritimum, Euphorbia paralias, Otanthus maritimus. White dunes are further subdivided by region: Atlantic, Western Tethyan, Canario-Saharan and Pontic.