The Mousterlin Marsh a natural treasure between land and sea

Originally, the marsh was connected to the ocean, as is the White Sea lagoon. Once an area of grazing and agricultural production, the marsh has long been shaped by man. It was in the 1950s that a land consolidation project threatened to profoundly alter the site.

At the beginning of the twentieth century, dykes and canals were built to remove the marsh from the sea in order to dry it out and increase agricultural land. This process of draining the coastal marshes is known as polderisation. Polders were created for human activities (ports, agriculture, etc.). There are several such polders on the Breton coast, including the Combrit polder in the Bigouden region and the Brest polder.

Thanks to the efforts of naturalists and local residents, the area was finally preserved and protected. Today, it is part of the Natura 2000 network, which guarantees sustainable management of its environments.

The Cleut-Rouz and Kerambigorn dunes

Between the Pointe de Mousterlin and the Pointe de Beg-Meil, the dune system forms a natural boundary between the Mousterlin marsh and the sea. The natural channels that once divided the dunes, bringing salt water to the marsh, have disappeared over time as the sand has shifted. The dunes now form a continuous line of sand.