{"id":715,"date":"2020-08-17T14:58:52","date_gmt":"2020-08-17T12:58:52","guid":{"rendered":"https:\/\/www.life-sallina.com\/les-sites\/les-marais-salants-de-guerande-et-du-mes\/"},"modified":"2020-09-22T14:38:42","modified_gmt":"2020-09-22T12:38:42","slug":"les-marais-salants-de-guerande-et-du-mes","status":"publish","type":"page","link":"https:\/\/www.life-sallina.com\/en\/les-sites\/les-marais-salants-de-guerande-et-du-mes\/","title":{"rendered":"The salt marshes of Gu\u00e9rande and M\u00e8s"},"content":{"rendered":"\t\t
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\u00bb The site<\/strong><\/span><\/p>\n

The salt marshes of the Gu\u00e9rande and M\u00e8s basins are artificially dammed marshes between the 9th and 14th centuries. They are bordered by intertidal mud flats, called the Traicts du Croisic and Mesquer-Pen B\u00e9, with a surface area of 680 and 270 hectares respectively. Intimately linked to the salt marshes, the Traicts du Croisic and Mesquer-Pen B\u00e9 constitute, with the marshes, a functional unit (all feeding and resting areas for birds) for the 25 to 35,000 wintering birds each year on the sites.<\/p>\n

The salt marshes are made up of a multitude of basins separated by clay slopes, generally of small width in the Gu\u00e9rande peninsula. They are supplied, from the traits and from the Bay of La Baule, by an extremely dense hydraulic network, composed of stirrups, bows and squids. This network makes it possible to distribute sea water in a series of basins which will all contribute, under the effect of the wind and the sun, to increase the temperature of sea water and to make it evaporate to lead to salt crystallization. Throughout its journey, water circulates by gravity and flows through the basins.<\/p>\n

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Operation of a salt marsh (source: Cap Atlantique)<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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This multitude of basins, the hydraulic network, the levels of salinity and the tangle of embankments give the marshes a great heterogeneity of environments, particularly favorable to biodiversity.<\/p>\n

\u00bb The biodiversity
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More than 85 species of birds covered by the Birds Directive use the site for migration, nesting or wintering. Of these, 43 species are listed in Annex I to the Directive. These particular species are those justifying the designation of Natura 2000 sites and which must be strictly protected within the European Union.<\/p>\n

The salt marshes of Gu\u00e9rande and M\u00e8s are a major challenge for several species:<\/p>\n