Sand-covered shorelines in general, but in particular, onshore areas of sand created by the action of wind and often colonised and stabilised by communities of coarse maritime grasses.
Humid depressions of the dunal systems. The most important habitats are included in the following units. If the divisions proposed are not sufficient, appropriate codes from 22.4, 22.3, 54.2, 54.4, 53 can be used in conjunction with them. Humid dune-slaks are extremely rich and specialized habitats very threatened by the lowering of water tables.