Surface, distribution et diversité des principaux milieux de Camargue. Leur évolution de 1942 à 1984
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1987
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Land, Conservation Protected natural areas Nature reserves Landmarks, Natural Nature preserves Lands, Conservation Reserves, Nature Conservation lands Natural landmarks Protected natural sites Nature conservation lands Preserves, Nature Nature conservation areas Protected natural regions Natural area preserves Preserves, Natural area Natural history reservations Conservation land Reservations, Natural history Area preserves, NaturalCiter ce document
Sophie Lemaire et al., « Surface, distribution et diversité des principaux milieux de Camargue. Leur évolution de 1942 à 1984 », Revue d'Écologie (La Terre et La Vie) (documents), ID : 10.3406/revec.1987.6251
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Résumé
The changes in surface area of the major habitats of the Camargue, between 1942 and 1984, were quantified, using aerial photographs taken during this time interval, as well as ground checks. Whereas «natural areas» covered 67 % of the Camargue in 1942, this percentage has now been reduced by more than one third. 40 000 ha were lost in 40 years, i.e. 1 000 ha per year on the average. «Artificial» areas now predominate, and presently cover 56 % of the Camargue (145 000 ha). They are made up of crop lands (52 000 ha), salt marshes (21 000 ha), and industrial areas (8 600 ha). The «natural areas» left are mostly marshes managed for hunting purposes (18 000 ha), large permanent ponds (14 500 ha), «sansouires» (12 000 ha), prairies (4 800 ha), and temporary halomorph ponds (3 000 ha). Besides being reduced in size, the «natural areas» are now much more scattered than the «artificial» areas. Their barycentres are all located in the centre of the delta, and they did not change place during the last forty years — except for salt marshes and temporary ponds.