{"id":13300,"date":"2016-04-28T15:38:11","date_gmt":"2016-04-28T12:38:11","guid":{"rendered":"https:\/\/medwet.org\/?p=13300"},"modified":"2016-05-10T19:00:26","modified_gmt":"2016-05-10T16:00:26","slug":"evolution-occupation-sol-sites-ramsar-france-metropolitaine","status":"publish","type":"post","link":"https:\/\/medwet.org\/fr\/evolution-occupation-sol-sites-ramsar-france-metropolitaine\/","title":{"rendered":"Evolution de l\u2019occupation du sol dans les sites Ramsar de France m\u00e9tropolitaine de 1975 \u00e0 2005"},"content":{"rendered":"<p>La d\u00e9signation en sites Ramsar est une reconnaissance internationale, accord\u00e9e aux milieux humides les plus importants du monde. Sur les 44 sites d\u00e9sign\u00e9s par la France, 33 se trouvent en m\u00e9tropole.<\/p>\n<p>Dans le cadre de <a href=\"http:\/\/indicateurs-biodiversite.naturefrance.fr\/thematiques\/biodiversite-milieux-humides\" target=\"_blank\">l\u2019Observatoire National des milieux humides<\/a>, la Tour du Valat (<a href=\"https:\/\/medwet.org\/fr\/observatory\/\" target=\"_blank\">Observatoire des Zones Humides M\u00e9diterran\u00e9e<\/a>nnes) avec l\u2019aide de l\u2019Association Ramsar-France, a \u00e9tudi\u00e9 l\u2019\u00e9volution de l\u2019occupation du sol dans 32 de ces sites entre 1975, 1990 et 2005, \u00e0 partir d\u2019images satellites. Utilisant la m\u00e9thodologie du projet <a href=\"http:\/\/www.globwetland.org\/\" target=\"_blank\">GlobWetland-II<\/a> (men\u00e9 en partenariat avec l\u2019Agence Spatiale Europ\u00e9enne, Jena Optronik et le Secr\u00e9tariat Ramsar), elle a permis d&rsquo;analyser l&rsquo;\u00e9volution des grandes classes d\u2019habitats, en particulier des milieux humides (naturels et artificiels)\u00a0; d\u2019analyser le niveau de pression agricole et urbain\u00a0sur les sites Ramsar m\u00e9tropolitains de France ; et d\u2019\u00e9tablir des cartes d\u2019occupation du sol simplifi\u00e9e des 32 sites. Optimis\u00e9e pour une \u00e9chelle globale, la m\u00e9thode permet de mettre en \u00e9vidence des tendances \u00e0 l\u2019\u00e9chelle de l&rsquo;ensemble des sites.<\/p>\n<p>Il s\u2019agit du premier essai de d\u00e9clinaison nationale d\u2019une d\u00e9marche de suivi \u00e0 partir d\u2018images satellitaires, appliqu\u00e9e en 2009-14 \u00e0 l\u2019\u00e9chelle du bassin m\u00e9diterran\u00e9en. Quelques autres pays comme l&rsquo;Alg\u00e9rie et la Tunisie sont int\u00e9ress\u00e9s pour r\u00e9\u00e9diter cette approche nationale.<\/p>\n<p><strong>Principaux r\u00e9sultats\u00a0:<\/strong><\/p>\n<ul>\n<li>Globalement, en 30 ans, les milieux humides <u>naturels<\/u>\u00a0ont r\u00e9gress\u00e9 de 6%, et les milieux humides artificiels\u00a0progress\u00e9 de 38% dans les sites Ramsar m\u00e9tropolitains. Les milieux naturels terrestres ont aussi r\u00e9gress\u00e9. Ces changements sous-estiment probablement ceux ayant affect\u00e9 les zones humides de France en g\u00e9n\u00e9ral, souvent mois bien prot\u00e9g\u00e9es\/valoris\u00e9es que les sites Ramsar.<\/li>\n<li>Marais &amp; lagunes, for\u00eats inondables et prairies humides sont les milieux humides qui ont le plus r\u00e9gress\u00e9 entre 1975 et 2005.<\/li>\n<li>A l\u2019inverse, lacs et \u00e9tangs artificiels ont fortement progress\u00e9.<\/li>\n<\/ul>\n<ul>\n<li>Les milieux urbanis\u00e9s ont fortement progress\u00e9 entre 1975 et 2005\u00a0(+ 39%), tant dans les sites Ramsar m\u00e9tropolitains que dans leurs proches alentours.<\/li>\n<li>En revanche l\u2019agriculture a stagn\u00e9 : +2% \u00e0 +4 % dans les sites, -2% \u00e0 -3% dans les alentours.<\/li>\n<li>Le littoral m\u00e9diterran\u00e9en appara\u00eet comme le plus concern\u00e9 par la progression tant de l\u2019agriculture que des milieux urbains.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h4><strong><a href=\"https:\/\/medwet.org\/wp-content\/uploads\/2016\/04\/Rapport-MEDDE-2015-FINAL.pdf\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-13304\" src=\"https:\/\/medwet.org\/wp-content\/uploads\/2016\/04\/rapport.jpg\" alt=\"rapport\" width=\"100\" height=\"143\" \/><\/a>Plus d\u2019informations<\/strong><\/h4>\n<p>T\u00e9l\u00e9charger le <a href=\"https:\/\/medwet.org\/wp-content\/uploads\/2016\/04\/Rapport-MEDDE-2015-VF.pdf\" target=\"_blank\">rapport ici<\/a>.<\/p>\n<p>&nbsp;<\/p>\n<h4><strong>Contacts<\/strong><\/h4>\n<p>C.Perennou <a href=\"m&#97;&#105;&#108;&#x74;&#x6f;&#x3a;pe&#114;&#101;&#x6e;&#x6e;&#x6f;&#x75;&#64;t&#111;&#117;&#x72;&#x64;&#x75;&#x76;a&#108;&#97;&#116;&#x2e;&#x6f;&#x72;g\" target=\"_blank\">&#x70;&#x65;&#x72;&#x65;&#110;&#110;&#111;u&#64;&#x74;&#x6f;&#x75;&#x72;&#x64;&#117;&#118;&#97;la&#x74;&#x2e;&#x6f;&#x72;&#x67;<\/a><\/p>\n<p>A.Guelmami <a href=\"&#x6d;&#97;i&#x6c;&#116;o&#x3a;&#103;u&#x65;&#108;m&#x61;&#109;i&#x40;&#x74;o&#x75;&#x72;&#100;&#x75;&#x76;&#97;&#x6c;&#x61;&#116;&#46;&#x6f;&#114;g\" target=\"_blank\">&#x67;&#x75;&#x65;&#108;&#109;&#97;mi&#x40;&#x74;&#x6f;&#x75;&#114;&#100;uv&#x61;&#x6c;&#x61;&#x74;&#46;&#111;rg<\/a><\/p>\n<p>Chefs de projet Observatoire des Zones Humides M\u00e9diterran\u00e9ennes<\/p>\n<p>Tour du Valat<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>La d\u00e9signation en sites Ramsar est une reconnaissance internationale, accord\u00e9e aux milieux humides les plus importants du monde. Sur les 44 sites d\u00e9sign\u00e9s par la France, 33 se trouvent en [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":13302,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[113,3],"tags":[480,476,309,479,482,481,483,477,478,167],"class_list":["post-13300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-france","category-bmedwet_news","tag-1975-2005","tag-evolution","tag-france","tag-metropolitaine","tag-milieux-humides","tag-national","tag-naturels","tag-occupation-du-sol","tag-sites-ramsar","tag-zones-humides","medwet_news_country-france"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"La d\u00e9signation en sites Ramsar est une reconnaissance internationale, accord\u00e9e aux milieux humides les plus importants du monde. Sur les 44 sites d\u00e9sign\u00e9s par la France, 33 se trouvent en m\u00e9tropole. Dans le cadre de l\u2019Observatoire National des milieux humides, la Tour du Valat (Observatoire des Zones Humides M\u00e9diterran\u00e9ennes) avec l\u2019aide de l\u2019Association Ramsar-France, a\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Abderahim SMARI\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/medwet.org\/fr\/evolution-occupation-sol-sites-ramsar-france-metropolitaine\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.8\" \/>\n\t\t<meta property=\"og:locale\" content=\"fr_FR\" \/>\n\t\t<meta property=\"og:site_name\" content=\"MedWet | Les zones humides pour une r\u00e9gion m\u00e9diterran\u00e9enne durable\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Evolution de l\u2019occupation du sol dans les sites Ramsar de France m\u00e9tropolitaine de 1975 \u00e0 2005 | MedWet\" \/>\n\t\t<meta property=\"og:description\" content=\"La d\u00e9signation en sites Ramsar est une reconnaissance internationale, accord\u00e9e aux milieux humides les plus importants du monde. Sur les 44 sites d\u00e9sign\u00e9s par la France, 33 se trouvent en m\u00e9tropole. Dans le cadre de l\u2019Observatoire National des milieux humides, la Tour du Valat (Observatoire des Zones Humides M\u00e9diterran\u00e9ennes) avec l\u2019aide de l\u2019Association Ramsar-France, a\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/medwet.org\/fr\/evolution-occupation-sol-sites-ramsar-france-metropolitaine\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2016-04-28T12:38:11+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2016-05-10T16:00:26+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/MedWetOrg\/\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary\" \/>\n\t\t<meta name=\"twitter:site\" content=\"@MedWetOrg\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Evolution de l\u2019occupation du sol dans les sites Ramsar de France m\u00e9tropolitaine de 1975 \u00e0 2005 | MedWet\" \/>\n\t\t<meta name=\"twitter:description\" content=\"La d\u00e9signation en sites Ramsar est une reconnaissance internationale, accord\u00e9e aux milieux humides les plus importants du monde. 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