The image of white dunes is the epitome of recreational holiday landscapes on the North Sea and Baltic Sea.
By more or less strong Sandanwehungen on the coasts, white dunes can tower up to several meters high. You lose something the contact to the deeper areas, which are still strongly influenced by salt water - it is called the Aussüßung of the soil. These are generally more favorable conditions for plants and this can be on these skins in particular the beach grass (Ammophila arenaria, photo) grow well as a typical grass species. The name Weißdüne derives from the fact that the Sandanwehungen are still relatively fresh and thus more or less white. Only later, when the dune stabilizes, a bottom formation can begin and the resulting humus then colors the dunes; one then speaks of gray dunes.
In addition to the beach grass other plant species can typically grow on white dunes, for example: beach winds (Calystegia soldanella), four-horned hornwort (Cerastium diffusum), beach rye (Elymus arenarius), beach thistle (Eryngium maritimum), dune red fescue (Festuca rubrassp. Arenaria), Beach Flatback (Lathyrus maritimus) or Sand Evening Primrose (Oenothera oakesiana). From a botanical point of view, another species of grass is important: the Baltic beachgrass (Calammophila baltica) - it is a sterile hybrid of beachgrass and landbackgrass (Calamagrostis epigeos) and spreads through the roots.
December 1, 2019
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