{"id":8854,"date":"2026-07-09T12:31:09","date_gmt":"2026-07-09T16:31:09","guid":{"rendered":"https:\/\/martinique2050.com\/?p=8854"},"modified":"2026-07-10T02:31:43","modified_gmt":"2026-07-10T06:31:43","slug":"apres-les-pertes-les-recifs-coralliens-se-recomposent","status":"publish","type":"post","link":"https:\/\/martinique2050.com\/en\/apres-les-pertes-les-recifs-coralliens-se-recomposent\/","title":{"rendered":"After suffering losses, coral reefs recover"},"content":{"rendered":"<div class=\"qMYqUG_convSearchResultHighlightRoot\">\n<div class=\"\" data-turn-id-container=\"request-6a4d418a-aae8-83ea-83ea-ade0a25b1da4-2\" 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-6a4d418a-aae8-83ea-83ea-ade0a25b1da4-2\" data-turn-id-container=\"request-6a4d418a-aae8-83ea-83ea-ade0a25b1da4-2\" data-testid=\"conversation-turn-22\" 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=\"6524cd60-c56a-4af1-bb35-2e2f62579d43\" 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<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"85\" data-end=\"529\"><em>La crise qui frappe les r\u00e9cifs coralliens de Martinique ne se r\u00e9sume pas au nombre de colonies disparues. Apr\u00e8s les \u00e9pisodes successifs de blanchissement de 2023 et 2024, les suivis scientifiques mettent aussi en \u00e9vidence une \u00e9volution de la composition des communaut\u00e9s coralliennes. Certaines esp\u00e8ces tr\u00e8s sensibles ont subi des mortalit\u00e9s massives, tandis que d\u2019autres, paraissant plus r\u00e9sistantes, occupent d\u00e9sormais une place pr\u00e9pond\u00e9rante.<\/em><\/p>\n<blockquote class=\"quote-solid\">\n<p data-start=\"531\" data-end=\"899\">C\u2019est l\u2019un des enseignements du 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> sur les suivis men\u00e9s aux Antilles fran\u00e7aises entre 2023 et 2025. En Martinique, les observations r\u00e9alis\u00e9es sur 12 stations montrent que les deux \u00e9pisodes de blanchissement n\u2019ont pas affect\u00e9 toutes les esp\u00e8ces de la m\u00eame mani\u00e8re.<\/p>\n<\/blockquote>\n<h2 data-section-id=\"1lgwc8n\" data-start=\"901\" data-end=\"955\">Les esp\u00e8ces b\u00e2tisseuses parmi les grandes perdantes<\/h2>\n<p data-start=\"957\" data-end=\"1250\">Les esp\u00e8ces du genre <em data-start=\"978\" data-end=\"988\">Acropora<\/em> figurent parmi les plus durement touch\u00e9es. \u00c0 l\u2019\u00e9chelle des Antilles fran\u00e7aises, le bilan signale la perte de colonies bioconstructrices telles qu\u2019<em data-start=\"1135\" data-end=\"1153\">Acropora palmata<\/em> et <em data-start=\"1157\" data-end=\"1179\">Acropora cervicornis<\/em>, deux esp\u00e8ces qui participent \u00e0 la formation de la structure r\u00e9cifale.<\/p>\n<p data-start=\"1252\" data-end=\"1751\">En Martinique, <em data-start=\"1267\" data-end=\"1285\">Acropora palmata<\/em> a subi des pertes particuli\u00e8rement s\u00e9v\u00e8res. Apr\u00e8s le blanchissement de 2023, cette esp\u00e8ce faisait partie, avec <em data-start=\"1397\" data-end=\"1415\">Agaricia humilis<\/em> et <em data-start=\"1419\" data-end=\"1436\">Porites porites<\/em>, des coraux pour lesquels des mortalit\u00e9s proches de <strong data-start=\"1489\" data-end=\"1510\">90 % des colonies<\/strong> ont \u00e9t\u00e9 rapport\u00e9es. Le ph\u00e9nom\u00e8ne de 2024 l\u2019a de nouveau fortement affect\u00e9e : une mortalit\u00e9 de l\u2019ordre de <strong data-start=\"1616\" data-end=\"1624\">90 %<\/strong> a alors \u00e9t\u00e9 observ\u00e9e chez <em data-start=\"1651\" data-end=\"1669\">Acropora palmata<\/em>, <em data-start=\"1671\" data-end=\"1688\">Porites porites<\/em> et <em data-start=\"1692\" data-end=\"1712\">Madracis auretenra<\/em>.<\/p>\n<p data-start=\"1753\" data-end=\"2049\">Cette succession de pertes est importante au-del\u00e0 du seul recul num\u00e9rique. Toutes les esp\u00e8ces coralliennes ne jouent pas le m\u00eame r\u00f4le dans l\u2019architecture du r\u00e9cif. La disparition ou la forte rar\u00e9faction des esp\u00e8ces bioconstructrices modifie progressivement la structure des communaut\u00e9s pr\u00e9sentes.<\/p>\n<h2 data-section-id=\"4ha3im\" data-start=\"2051\" data-end=\"2118\">Des esp\u00e8ces paraissant plus r\u00e9sistantes deviennent pr\u00e9dominantes<\/h2>\n<p data-start=\"2120\" data-end=\"2434\">\u00c0 l\u2019inverse, certaines esp\u00e8ces semblent avoir mieux travers\u00e9 les \u00e9pisodes r\u00e9cents. Le rapport rel\u00e8ve, \u00e0 l\u2019\u00e9chelle antillaise, la pr\u00e9dominance croissante de coraux paraissant plus r\u00e9sistants au blanchissement, parmi lesquels <em data-start=\"2344\" data-end=\"2364\">Porites astreoides<\/em>, <em data-start=\"2366\" data-end=\"2385\">Madracis decactis<\/em>, <em data-start=\"2387\" data-end=\"2408\">Siderastrea siderea<\/em> et <em data-start=\"2412\" data-end=\"2433\">Siderastrea radians<\/em>.<\/p>\n<p data-start=\"2436\" data-end=\"2696\">La tendance se retrouve dans les observations martiniquaises. En 2025, les peuplements coralliens suivis sont principalement domin\u00e9s par <em data-start=\"2573\" data-end=\"2593\">Porites astreoides<\/em>, <em data-start=\"2595\" data-end=\"2616\">Siderastrea siderea<\/em>, <em data-start=\"2618\" data-end=\"2634\">Millepora spp.<\/em> et <em data-start=\"2638\" data-end=\"2657\">Madracis decactis<\/em>.<\/p>\n<p data-start=\"2698\" data-end=\"2987\">Le second blanchissement a \u00e9galement r\u00e9v\u00e9l\u00e9 des diff\u00e9rences de sensibilit\u00e9. <em data-start=\"2774\" data-end=\"2797\">Montastraea cavernosa<\/em>, <em data-start=\"2799\" data-end=\"2820\">Orbicella annularis<\/em> et <em data-start=\"2824\" data-end=\"2845\">Orbicella faveolata<\/em> ont \u00e9t\u00e9 moins touch\u00e9es qu\u2019en 2023, ce que le rapport pr\u00e9sente comme le signe d\u2019une certaine r\u00e9sistance.<\/p>\n<p data-start=\"2989\" data-end=\"3242\">Le paysage r\u00e9cifal qui se dessine apr\u00e8s les deux \u00e9pisodes successifs n\u2019est donc pas simplement celui d\u2019un r\u00e9cif moins abondant. Il correspond aussi \u00e0 une communaut\u00e9 diff\u00e9rente, fa\u00e7onn\u00e9e par la vuln\u00e9rabilit\u00e9 variable des esp\u00e8ces face au stress thermique.<\/p>\n<h2 data-section-id=\"hpckaj\" data-start=\"3244\" data-end=\"3298\">Des r\u00e9cifs moins complexes sur le plan structurel ?<\/h2>\n<p data-start=\"3300\" data-end=\"3457\">Cette recomposition soul\u00e8ve une autre question : les esp\u00e8ces qui r\u00e9sistent davantage peuvent-elles assurer les m\u00eames fonctions que celles qui disparaissent ?<\/p>\n<p data-start=\"3459\" data-end=\"3799\">Le bilan de l\u2019IFRECOR apporte ici un \u00e9l\u00e9ment essentiel. Plusieurs esp\u00e8ces devenant pr\u00e9dominantes sont de plus petite taille, avec parfois des colonies morcel\u00e9es ou encro\u00fbtantes. Elles contribuent ainsi moins \u00e0 la <strong data-start=\"3672\" data-end=\"3718\">structuration tridimensionnelle des r\u00e9cifs<\/strong> que les grandes esp\u00e8ces bioconstructrices.<\/p>\n<p data-start=\"3801\" data-end=\"4202\">Autrement dit, la pr\u00e9sence persistante de coraux ne signifie pas n\u00e9cessairement le maintien d\u2019un r\u00e9cif identique dans sa forme et son fonctionnement. La composition des communaut\u00e9s compte autant que leur seule abondance. Le rapport indique d\u2019ailleurs que ces changements auront un impact sur les <strong data-start=\"4097\" data-end=\"4163\">fonctionnalit\u00e9s \u00e9cologiques des r\u00e9cifs coralliens des Antilles<\/strong>.<\/p>\n<p data-start=\"4204\" data-end=\"4537\">En Martinique, cette \u00e9volution intervient dans un contexte d\u00e9j\u00e0 fortement d\u00e9grad\u00e9. En 2025, les communaut\u00e9s benthiques des cinq stations du r\u00e9seau GCRMN suivies sont domin\u00e9es par les peuplements algaux, tandis que trois d\u2019entre elles pr\u00e9sentent une couverture corallienne inf\u00e9rieure \u00e0 <strong data-start=\"4489\" data-end=\"4498\">5,5 %<\/strong>.<\/p>\n<p data-start=\"4539\" data-end=\"5012\" data-is-last-node=\"\" data-is-only-node=\"\">Les blanchissements de 2023 et 2024 ont ainsi laiss\u00e9 une empreinte qui d\u00e9passe la mortalit\u00e9 imm\u00e9diate. \u00c0 mesure que certaines esp\u00e8ces sensibles reculent et que d\u2019autres prennent davantage de place, c\u2019est la physionomie m\u00eame des communaut\u00e9s r\u00e9cifales martiniquaises qui \u00e9volue. Une transformation encore en cours, dont les effets ne se mesureront pas seulement au nombre de coraux pr\u00e9sents, mais aussi \u00e0 la capacit\u00e9 des r\u00e9cifs futurs \u00e0 conserver leurs fonctions \u00e9cologiques.<\/p>\n<hr \/>\n<p data-start=\"4539\" data-end=\"5012\" data-is-last-node=\"\" data-is-only-node=\"\"><em>A lire aussi : <a href=\"https:\/\/martinique2050.com\/martinique-78-des-colonies-coralliennes-perdues-sur-12-stations-suivies-entre-2023-et-2025\/\">Martinique : 78 % des colonies coralliennes perdues sur 12 stations suivies entre 2023 et 2025<\/a><\/em><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>La crise qui frappe les r\u00e9cifs coralliens de Martinique ne se r\u00e9sume pas au nombre de colonies disparues. Apr\u00e8s les \u00e9pisodes successifs de blanchissement de 2023 et 2024, les suivis scientifiques mettent aussi en \u00e9vidence une \u00e9volution de la composition des communaut\u00e9s coralliennes. Certaines esp\u00e8ces tr\u00e8s sensibles ont subi des mortalit\u00e9s massives, tandis que d\u2019autres, &hellip;<\/p>","protected":false},"author":3,"featured_media":8856,"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-8854","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 v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Apr\u00e8s les pertes, les r\u00e9cifs coralliens se recomposent - martinique2050<\/title>\n<meta name=\"description\" content=\"La crise qui frappe les r\u00e9cifs coralliens de Martinique ne se r\u00e9sume pas au nombre de colonies disparues. 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