Adrift line orwrack line,[1] also known as awash margin[2] orwash fringe[2] (German:Spülsaum)[2] is an area of the shore on which material is deposited or washed up. It often runs along the margin of a waterbody and there can be several bands due to variations in water levels. As a result of the richness of nutrients that occur in such wash fringes,ruderal species frequently occur here, that, for example, on theBaltic Sea coast consist ofgrassleaf orache andsea kale.
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