{"id":12865,"date":"2025-07-30T08:06:50","date_gmt":"2025-07-30T12:06:50","guid":{"rendered":"https:\/\/www.vert-intense.com\/?p=12865"},"modified":"2026-02-23T15:02:26","modified_gmt":"2026-02-23T19:02:26","slug":"les-sargasses-dans-le-monde-un-fleau-global-aux-racines-complexes-dans-la-caraibe","status":"publish","type":"post","link":"https:\/\/www.vert-intense.com\/fr\/les-sargasses-dans-le-monde-un-fleau-global-aux-racines-complexes-dans-la-caraibe\/","title":{"rendered":"Les sargasses dans le monde et en Guadeloupe : comprendre le ph\u00e9nom\u00e8ne et continuer de r\u00eaver."},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Un ph\u00e9nom\u00e8ne naturel \u00e0 l&#8217;\u00e9chelle mondiale.<\/p>\n<\/blockquote>\n\n\n\n<p>Entre bouleversements climatiques, d\u00e9s\u00e9quilibres oc\u00e9aniques, les sargasses se multiplient sur les c\u00f4tes de l\u2019Atlantique et des Cara\u00efbes. Nouveau d\u00e9fi \u00e9cologique complexe et sanitaire \u00e0 l\u2019\u00e9chelle mondiale !<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-qu-est-ce-que-les-sargasses\">Qu\u2019est-ce que les sargasses ?<\/h4>\n\n\n\n<p>Les sargasses sont des algues brunes flottantes appartenant au genre Sargassum. Originaires de la mer des Sargasses, zone situ\u00e9e dans l\u2019Atlantique Nord, elles faisaient historiquement partie d\u2019un \u00e9cosyst\u00e8me \u00e9quilibr\u00e9.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-depuis-quand\">Depuis quand ?<\/h4>\n\n\n\n<p>D\u00e9j\u00e0 en 1492, Christophe Colomb relatait dans son journal la pr\u00e9sence d\u2019algues brunes. Une zone calme et myst\u00e9rieuse nomm\u00e9e mer des Sargasses, qu\u2019il traversa sans encombre avant la d\u00e9couverte de la Guadeloupe. Egalement une carte oc\u00e9anographique d\u2019Otto Kr\u00fcmmel datant de 1891 atteste leur pr\u00e9sence dans l\u2019Atlantique.<\/p>\n\n\n\n<p>Maintenant et depuis plus d&#8217;une d\u00e9cennie, les invasions massives de sargasses perturbent gravement les \u00e9cosyst\u00e8mes c\u00f4tiers. Et \u00e9galement les activit\u00e9s \u00e9conomiques et la sant\u00e9 publique dans les r\u00e9gions tropicales, notamment en Guadeloupe. Ces algues brunes autrefois confin\u00e9es \u00e0 l\u2019Atlantique Nord, prolif\u00e8rent aujourd\u2019hui \u00e0 une \u00e9chelle mondiale. <\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"850\" height=\"655\" data-id=\"12878\" src=\"https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/carte-1891-dapres-Otto-Krummel.jpg?resize=850%2C655&#038;ssl=1\" alt=\"Carte des sargasses en 1891 d'apr\u00e8s Otto Krummel\" class=\"wp-image-12878\" srcset=\"https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/carte-1891-dapres-Otto-Krummel.jpg?w=850&amp;ssl=1 850w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/carte-1891-dapres-Otto-Krummel.jpg?resize=300%2C231&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/carte-1891-dapres-Otto-Krummel.jpg?resize=768%2C592&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/carte-1891-dapres-Otto-Krummel.jpg?resize=16%2C12&amp;ssl=1 16w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/carte-1891-dapres-Otto-Krummel.jpg?resize=600%2C462&amp;ssl=1 600w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/><figcaption class=\"wp-element-caption\">Carte des sargasses en 1891 d&#8217;apr\u00e8s Otto Krummel<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-un-phenomene-mondial\">Un ph\u00e9nom\u00e8ne mondial<\/h4>\n\n\n\n<p>Depuis 2011, une \u201cgrande ceinture de sargasses de l\u2019Atlantique\u201d s\u2019est form\u00e9e. Elle s&#8217;\u00e9tendant sur pr\u00e8s de 8 000 km.<\/p>\n\n\n\n<p>Les pays les plus touch\u00e9s sont :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Le Br\u00e9sil, notamment la c\u00f4te nord, o\u00f9 les \u00e9chouages affectent les \u00e9cosyst\u00e8mes marins.<\/li>\n\n\n\n<li>Le Mexique, avec des tonnes de sargasses ramass\u00e9es chaque semaine \u00e0 Canc\u00fan et Tulum, affectant gravement le tourisme.<\/li>\n\n\n\n<li>La Floride, r\u00e9guli\u00e8rement impact\u00e9e, notamment dans les Keys.<\/li>\n\n\n\n<li>Les Cara\u00efbes, dans leur ensemble, du sud de la R\u00e9publique Dominicaine jusqu\u2019\u00e0 la Martinique.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-les-causes-de-la-proliferation\">Les causes de la prolif\u00e9ration<\/h4>\n\n\n\n<p>Ce ph\u00e9nom\u00e8ne est multifactoriel :<\/p>\n\n\n\n<p>Le r\u00e9chauffement des eaux stimule la croissance rapide des sargasses.<\/p>\n\n\n\n<p>Les apports massifs en nutriments provenant des fleuves comme l\u2019Amazone ou le Congo, souvent li\u00e9s \u00e0 l\u2019agriculture, nourrissent ces algues.<\/p>\n\n\n\n<p>Les courants marins modifi\u00e9s par les changements climatiques redistribuent les masses de sargasses vers des zones habituellement non touch\u00e9es.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-consequences-environnementales-et-humaines\">Cons\u00e9quences environnementales et humaines<\/h4>\n\n\n\n<p>Les impacts sont multiples :<\/p>\n\n\n\n<p>\u00c9cologiques : asphyxie des coraux et herbiers, mort de poissons, destruction de la biodiversit\u00e9 littorale.<\/p>\n\n\n\n<p>Sanitaires : la d\u00e9composition des algue \u00e9met un gaz toxique (H2S) provoquant des maux de t\u00eate, naus\u00e9es et troubles respiratoires.<\/p>\n\n\n\n<p>\u00c9conomiques : paralysie du tourisme, p\u00eache difficile, d\u00e9valuation des biens immobiliers en bord de mer.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-en-guadeloupe-un-combat-quotidien\">En Guadeloupe : un combat quotidien<\/h4>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-canal-des-Saintes.jpg?resize=1024%2C768&#038;ssl=1\" alt=\"Bancs de Sargasses au large de la Guadeloupe\" class=\"wp-image-12876\" srcset=\"https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-canal-des-Saintes.jpg?resize=1024%2C768&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-canal-des-Saintes.jpg?resize=300%2C225&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-canal-des-Saintes.jpg?resize=768%2C576&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-canal-des-Saintes.jpg?resize=16%2C12&amp;ssl=1 16w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-canal-des-Saintes.jpg?resize=600%2C450&amp;ssl=1 600w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-canal-des-Saintes.jpg?w=1400&amp;ssl=1 1400w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">Bancs de Sargasses au large de la Guadeloupe<\/figcaption><\/figure>\n\n\n\n<p>En Guadeloupe, l\u2019arriv\u00e9e massive de sargasses concerne particuli\u00e8rement les c\u00f4tes de Grande-Terre, Marie-Galante et la commune de Capesterre-Belle-Eau. Depuis 2018, les \u00e9chouages sont devenus quasi permanents entre avril et octobre. Malgr\u00e9 les efforts de ramassage, les plages sont r\u00e9guli\u00e8rement envahies et les riverains souffrent de pollution de l\u2019air.<\/p>\n\n\n\n<p>La Guadeloupe a mis en place des plans d\u2019urgence. Et la recherche de solutions de valorisation (compost, biomat\u00e9riaux, biogaz) est en cours, mais peine \u00e0 se structurer \u00e0 grande \u00e9chelle. La lutte contre les sargasses est indispensable pour l&#8217;\u00e9conomie et n\u00e9cessite des solutions partant de la racine des fl\u00e9aux.<\/p>\n\n\n\n<p>La population locale s\u2019organise entre r\u00e9silience et exasp\u00e9ration, oscillant entre l&#8217;attente de solutions structurelles et l\u2019urgence d&#8217;une r\u00e9ponse sanitaire. Les sargasses, loin d\u2019\u00eatre un simple d\u00e9sagr\u00e9ment, sont devenues en Guadeloupe un enjeu environnemental, sanitaire et social majeur. Les cons\u00e9quences des sargasses sur l&#8217;\u00e9conomie en Guadeloupe ne peuvent \u00eatre ignor\u00e9es, <strong>et l&#8217;\u00eele doit continuer \u00e0 faire r\u00eaver<\/strong>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-faut-il-annuler-ses-vacances-en-guadeloupe-bien-sure-que-non\">Faut-il annuler ses vacances en Guadeloupe ? bien s\u00fbre que non!<\/h4>\n\n\n\n<p>Il est important de relativiser : toutes les plages de Guadeloupe ne sont pas touch\u00e9es.  Le r\u00eave des plages avec l&#8217;eau cristalline est toujours pr\u00e9sent ! De nombreuses zones restent parfaitement baignables. Notamment sur la c\u00f4te sous le vent (Basse-Terre), et un ramassage r\u00e9gulier limite les nuisances des zones touch\u00e9es.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-votre-sejour-nature-et-serenite-avec-les-bananes-vertes-et-vert-intense\">Votre s\u00e9jour nature et s\u00e9r\u00e9nit\u00e9 avec les Bananes Vertes et Vert-Intense<\/h4>\n\n\n\n<p>Aux \u00e9colodges <a href=\"https:\/\/www.lesbananesvertes.fr\/fr\/\">les Bananes Vertes<\/a>, nich\u00e9es \u00e0 Saint-Claude, nous sommes loin des zones directement expos\u00e9es aux sargasses.<br>Proche de la for\u00eat tropicale, naturellement prot\u00e9g\u00e9e gr\u00e2ce \u00e0 son altitude, ses sources fra\u00eeches, ses rivi\u00e8res de montagne. <br>Et <a href=\"https:\/\/www.vert-intense.com\/fr\/\">Vert-Intense<\/a>, votre expert en aventures, vous propose des activit\u00e9s : randonn\u00e9es volcaniques, baignades en rivi\u00e8re, canyoning<\/p>\n\n\n\n<p>S\u00e9journer chez nous, c\u2019est vivre la Guadeloupe autrement, dans un environnement sain,  loin du tourisme de masse.<br>Vous repartirez ressourc\u00e9, avec une vraie connexion \u00e0 la nature. Tout en soutenant une structure locale engag\u00e9e dans la protection de l\u2019environnement et la valorisation de son territoire.<\/p>\n\n\n\n<p>Pour organiser votre s\u00e9jour en Guadeloupe <a href=\"https:\/\/www.lesbananesvertes.fr\/fr\/\">Les Bananes Vertes<\/a> au pied du volcan de la Soufri\u00e8re, en montagne.<\/p>\n\n\n\n<p>Pour organiser vos activit\u00e9s en Guadeloupe <a href=\"https:\/\/www.vert-intense.com\/fr\/\">Vert-Intense<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/share.google\/1kwmDHpPeaKRdtLjI\">Bulletin de pr\u00e9vision d&#8217;\u00e9chouement<\/a> des sargasses p\u00e9lagiques sur la Guadeloupe par M\u00e9t\u00e9o-France Guadeloupe <\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-id=\"12875\" src=\"https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-plage-de-Grand-Anse-Trois-Rivieres.jpg?resize=1024%2C768&#038;ssl=1\" alt=\"SARGASSES\" class=\"wp-image-12875\" srcset=\"https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-plage-de-Grand-Anse-Trois-Rivieres.jpg?resize=1024%2C768&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-plage-de-Grand-Anse-Trois-Rivieres.jpg?resize=300%2C225&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-plage-de-Grand-Anse-Trois-Rivieres.jpg?resize=768%2C576&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-plage-de-Grand-Anse-Trois-Rivieres.jpg?resize=16%2C12&amp;ssl=1 16w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-plage-de-Grand-Anse-Trois-Rivieres.jpg?resize=600%2C450&amp;ssl=1 600w, https:\/\/i0.wp.com\/www.vert-intense.com\/wp-content\/uploads\/2025\/07\/Sargasses-plage-de-Grand-Anse-Trois-Rivieres.jpg?w=1400&amp;ssl=1 1400w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">Sargasses plage de Grand-Anse Trois-Rivi\u00e8res<\/figcaption><\/figure>\n<\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Un ph\u00e9nom\u00e8ne naturel \u00e0 l&#8217;\u00e9chelle mondiale. Entre bouleversements climatiques, d\u00e9s\u00e9quilibres oc\u00e9aniques, les sargasses se multiplient sur les c\u00f4tes de l\u2019Atlantique et des Cara\u00efbes. Nouveau d\u00e9fi \u00e9cologique complexe et sanitaire \u00e0 l\u2019\u00e9chelle mondiale ! Qu\u2019est-ce que les sargasses ? Les sargasses sont des algues brunes flottantes appartenant au genre Sargassum. Originaires de la mer des Sargasses, [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":12876,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[135],"tags":[],"class_list":["post-12865","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guadeloupe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.3.1 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Sargasses en Guadeloupe et r\u00eave : un d\u00e9fi \u00e9cologique - Vert Intense<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez les sargasses en Guadeloupe et r\u00eave d&#039;un \u00e9cosyst\u00e8me r\u00e9tabli. 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