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A marsh is a type of wetland ecosystem characterized by poorly drained mineral soils and dominated by grasses, distinguishing it from a swamp, which is dominated by trees. Marshes are often found at the mouths of rivers, particularly where deltas form, due to the steady supply of water and sediment.1

In Europe, notable river-mouth marshes include the Camargue in the Rhône Delta, the Guadalquivir in Spain, and the Danube in Romania. The Marschen specifically refers to reclaimed marshes along the North Sea coast in Germany and the Netherlands. The continent's largest marshland is the Pripet Marshes in Belarus and Ukraine.12

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