{"id":8813,"date":"2026-07-07T14:36:51","date_gmt":"2026-07-07T18:36:51","guid":{"rendered":"https:\/\/martinique2050.com\/?p=8813"},"modified":"2026-07-07T14:45:21","modified_gmt":"2026-07-07T18:45:21","slug":"martinique-78-des-colonies-coralliennes-perdues-sur-12-stations-suivies-entre-2023-et-2025","status":"publish","type":"post","link":"https:\/\/martinique2050.com\/en\/martinique-78-des-colonies-coralliennes-perdues-sur-12-stations-suivies-entre-2023-et-2025\/","title":{"rendered":"Martinique: 78 % of coral colonies lost at 12 monitoring sites between 2023 and 2025"},"content":{"rendered":"<div class=\"qMYqUG_convSearchResultHighlightRoot\">\n<div class=\"\" data-turn-id-container=\"request-WEB:67651bed-ad66-46d4-b5c1-ced7cb22b54c-19\" data-is-intersecting=\"true\">\n<section class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:67651bed-ad66-46d4-b5c1-ced7cb22b54c-19\" data-turn-id-container=\"request-WEB:67651bed-ad66-46d4-b5c1-ced7cb22b54c-19\" data-testid=\"conversation-turn-14\" data-turn=\"assistant\">\n<div class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" data-conversation-screenshot-content=\"\">\n<div class=\"flex max-w-full flex-col gap-4 grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+&amp;]:mt-1\" dir=\"auto\" tabindex=\"0\" data-message-author-role=\"assistant\" data-message-id=\"c6383c25-a182-471a-8e0a-d5d38e6c924a\" data-message-model-slug=\"gpt-5-5\" data-turn-start-message=\"true\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden\">\n<div class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\">\n<blockquote class=\"quote-solid\">\n<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"98\" data-end=\"410\">Les r\u00e9cifs coralliens de Martinique ont subi un choc majeur en moins de deux ans. Entre octobre 2023 et f\u00e9vrier 2025, une perte estim\u00e9e \u00e0 <strong data-start=\"236\" data-end=\"270\">78 % des colonies coralliennes<\/strong> a \u00e9t\u00e9 observ\u00e9e sur les 12 stations suivies autour de l\u2019\u00eele, selon le bilan publi\u00e9 en mars 2026 par l\u2019<span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">IFRECOR<\/span><\/span>.<\/p>\n<\/blockquote>\n<p data-start=\"412\" data-end=\"736\">Ce recul intervient apr\u00e8s deux \u00e9pisodes cons\u00e9cutifs de blanchissement, en 2023 puis en 2024, provoqu\u00e9s par deux canicules marines intenses. Le second ph\u00e9nom\u00e8ne a \u00e9t\u00e9 plus intense \u00e0 l\u2019\u00e9chelle des Antilles, avec des temp\u00e9ratures de surface plus \u00e9lev\u00e9es et une dur\u00e9e proche de quatre mois.<\/p>\n<hr \/>\n<h2 data-section-id=\"166f9ku\" data-start=\"738\" data-end=\"776\">En 2023, 84 % des colonies touch\u00e9es<\/h2>\n<p data-section-id=\"166f9ku\" data-start=\"738\" data-end=\"776\">Le premier \u00e9pisode a frapp\u00e9 une grande partie des colonies observ\u00e9es en Martinique. En 2023, <strong data-start=\"871\" data-end=\"933\">84 % d\u2019entre elles ont \u00e9t\u00e9 affect\u00e9es par le blanchissement<\/strong>. Le suivi r\u00e9alis\u00e9 en f\u00e9vrier 2024 a ensuite fait appara\u00eetre une <strong data-start=\"998\" data-end=\"1048\">mortalit\u00e9 de 34 % de la couverture corallienne<\/strong>.<\/p>\n<p data-start=\"1051\" data-end=\"1235\">Certaines esp\u00e8ces ont pay\u00e9 un tribut particuli\u00e8rement lourd. <em data-start=\"1112\" data-end=\"1130\">Acropora palmata<\/em>, <em data-start=\"1132\" data-end=\"1150\">Agaricia humilis<\/em> et <em data-start=\"1154\" data-end=\"1171\">Porites porites<\/em> ont enregistr\u00e9 des mortalit\u00e9s proches de <strong data-start=\"1213\" data-end=\"1234\">90 % des colonies<\/strong>.<\/p>\n<p data-start=\"1237\" data-end=\"1551\">Ces r\u00e9sultats proviennent des suivis conduits entre 2023 et 2025 par le bureau d\u2019\u00e9tudes Impact Mer pour l\u2019ODE Martinique, la DEAL Martinique et le Parc naturel marin de Martinique. Douze stations ont \u00e9t\u00e9 \u00e9tudi\u00e9es, dont onze int\u00e9gr\u00e9es au r\u00e9seau de la Directive-cadre sur l\u2019eau.<\/p>\n<h2 data-section-id=\"1qr4k1k\" data-start=\"1553\" data-end=\"1614\">En 2024, un second choc avant toute v\u00e9ritable r\u00e9cup\u00e9ration<\/h2>\n<p data-section-id=\"1qr4k1k\" data-start=\"1553\" data-end=\"1614\">L\u2019ann\u00e9e suivante, les r\u00e9cifs martiniquais ont \u00e9t\u00e9 confront\u00e9s \u00e0 un nouveau ph\u00e9nom\u00e8ne de blanchissement. Cette fois, <strong data-start=\"1731\" data-end=\"1765\">72 % des colonies coralliennes<\/strong> ont \u00e9t\u00e9 affect\u00e9es.<\/p>\n<p data-start=\"1786\" data-end=\"2044\">Entre novembre 2024 et f\u00e9vrier 2025, une mortalit\u00e9 de <strong data-start=\"1840\" data-end=\"1861\">33 % des colonies<\/strong> a \u00e9t\u00e9 relev\u00e9e. Plusieurs esp\u00e8ces sensibles ont de nouveau subi des pertes extr\u00eames : environ <strong data-start=\"1955\" data-end=\"1976\">90 % de mortalit\u00e9<\/strong> pour <em data-start=\"1982\" data-end=\"2000\">Acropora palmata<\/em>, <em data-start=\"2002\" data-end=\"2019\">Porites porites<\/em> et <em data-start=\"2023\" data-end=\"2043\">Madracis auretenra<\/em>.<\/p>\n<p data-start=\"2046\" data-end=\"2377\">Toutes les esp\u00e8ces n\u2019ont cependant pas r\u00e9agi de la m\u00eame mani\u00e8re. Le rapport rel\u00e8ve une moindre sensibilit\u00e9, par rapport \u00e0 l\u2019\u00e9pisode de 2023, chez <em data-start=\"2192\" data-end=\"2215\">Montastraea cavernosa<\/em>, <em data-start=\"2217\" data-end=\"2238\">Orbicella annularis<\/em> et <em data-start=\"2242\" data-end=\"2263\">Orbicella faveolata<\/em>. Cette diff\u00e9rence sugg\u00e8re une r\u00e9sistance variable face au stress thermique.<\/p>\n<h2 data-section-id=\"1cli33\" data-start=\"2379\" data-end=\"2434\">Une perte estim\u00e9e \u00e0 78 % sur les 12 stations suivies<\/h2>\n<p data-section-id=\"1cli33\" data-start=\"2379\" data-end=\"2434\">L\u2019accumulation des deux \u00e9pisodes se traduit par un bilan particuli\u00e8rement s\u00e9v\u00e8re. <em>Entre octobre 2023 et f\u00e9vrier 2025, 78 % des colonies coralliennes ont \u00e9t\u00e9 perdues sur les 12 stations suivies autour de la Martinique.<\/em><\/p>\n<p data-start=\"2659\" data-end=\"2903\">Ce r\u00e9sultat ne doit pas \u00eatre extrapol\u00e9 m\u00e9caniquement \u00e0 l\u2019ensemble des r\u00e9cifs de l\u2019\u00eele : il correspond au p\u00e9rim\u00e8tre pr\u00e9cis des stations \u00e9tudi\u00e9es. Il donne n\u00e9anmoins la mesure de la d\u00e9gradation observ\u00e9e sur les sites suivis pendant cette p\u00e9riode.<\/p>\n<p data-start=\"2905\" data-end=\"3266\">Les donn\u00e9es de plus long terme vont dans le m\u00eame sens. Sur cinq stations du r\u00e9seau GCRMN, le recouvrement corallien moyen a diminu\u00e9 de <strong data-start=\"3040\" data-end=\"3067\">61 % entre 2019 et 2025<\/strong>. En 2025, les peuplements algaux dominent les communaut\u00e9s benthiques et <em>trois de ces cinq stations pr\u00e9sentent une couverture corallienne inf\u00e9rieure \u00e0 5,5 %.<\/em><\/p>\n<p data-start=\"3268\" data-end=\"3633\">Le rapport relie cette trajectoire \u00e0 plusieurs pressions successives. Avant les deux \u00e9pisodes de blanchissement, les r\u00e9cifs avaient d\u00e9j\u00e0 \u00e9t\u00e9 affect\u00e9s par des maladies coralliennes, notamment la SCTLD entre 2019 et 2023. Les canicules marines de 2023 et 2024 se sont donc inscrites dans un contexte de fragilisation d\u00e9j\u00e0 engag\u00e9.<\/p>\n<p data-start=\"3635\" data-end=\"3914\" data-is-last-node=\"\" data-is-only-node=\"\">Le bilan 2023-2025 documente ainsi les effets cumul\u00e9s de deux blanchissements successifs sur les communaut\u00e9s coralliennes martiniquaises. Au-del\u00e0 du nombre de colonies perdues, une autre \u00e9volution se dessine d\u00e9sormais : <strong data-start=\"3855\" data-end=\"3913\">la composition m\u00eame des r\u00e9cifs est en train de changer<\/strong>.<\/p>\n<hr \/>\n<p data-start=\"3635\" data-end=\"3914\" data-is-last-node=\"\" data-is-only-node=\"\"><em>Consultez ici le rapport : <a href=\"https:\/\/ifrecor.fr\/blanchissements-aux-antilles-francaises-sur-la-periode-2023-2025\/\">https:\/\/ifrecor.fr\/blanchissements-aux-antilles-francaises-sur-la-periode-2023-2025\/<\/a><\/em><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Les r\u00e9cifs coralliens de Martinique ont subi un choc majeur en moins de deux ans. Entre octobre 2023 et f\u00e9vrier 2025, une perte estim\u00e9e \u00e0 78 % des colonies coralliennes a \u00e9t\u00e9 observ\u00e9e sur les 12 stations suivies autour de l\u2019\u00eele, selon le bilan publi\u00e9 en mars 2026 par l\u2019IFRECOR. Ce recul intervient apr\u00e8s deux &hellip;<\/p>","protected":false},"author":3,"featured_media":8814,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_canonical":"","_yoast_wpseo_opengraph-title":"","_yoast_wpseo_opengraph-description":"","_yoast_wpseo_twitter-title":"","_yoast_wpseo_twitter-description":"","footnotes":""},"categories":[1547],"tags":[],"class_list":["post-8813","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biodiversite"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Martinique : 78 % des colonies coralliennes perdues sur 12 stations suivies entre 2023 et 2025 - martinique2050<\/title>\n<meta name=\"description\" content=\"Les r\u00e9cifs coralliens de Martinique ont subi un choc majeur en moins de deux ans. 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