Natuurmonumenten (Dutch Society for Nature Conservation) is going to restore one of the largest freshwater lakes in western Europe by constructing islands, marshes and mud flats from the sediments that have accumulated in the lake in recent decades. These 'Marker Wadden' will form a unique ecosystem that will boost biodiversity in the Netherlands.
Lake Markermeer (700 km2) used to be part of the Dutch Zuiderzee, but is now cut off from the North Sea and rivers by dams, dikes and reclaimed land. The lake has barely any natural shores, and its waters are often extremely turbid as wind and waves churn up the accumulated sediments from the relatively shallow lake floor (2-4 m deep). As a result, fish and bird populations have declined dramatically.
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