{"id":378796,"date":"2026-01-04T18:53:24","date_gmt":"2026-01-04T17:53:24","guid":{"rendered":"https:\/\/realites.com.tn\/fr\/?p=378796"},"modified":"2026-01-04T18:54:38","modified_gmt":"2026-01-04T17:54:38","slug":"dr-ikbel-chaieb-les-feuilles-de-posidonie-un-indicateur-de-la-sante-du-littoral","status":"publish","type":"post","link":"https:\/\/realites.com.tn\/fr\/dr-ikbel-chaieb-les-feuilles-de-posidonie-un-indicateur-de-la-sante-du-littoral\/","title":{"rendered":"Dr Ikbel Cha\u00efeb : Les feuilles de posidonie, un indicateur de la sant\u00e9 du littoral"},"content":{"rendered":"<p>Le Dr Ikbel Chaieb, chercheur au Centre r\u00e9gional de recherche en horticulture et en agriculture biologique de Chott Meriem (Sousse), a soulign\u00e9 l\u2019importance environnementale des feuilles mortes de posidonie, souvent per\u00e7ues \u00e0 tort comme des d\u00e9chets.<\/p>\n<p><img decoding=\"async\" class=\"wp-image-378798 alignright\" src=\"https:\/\/realites.com.tn\/fr\/wp-content\/uploads\/2026\/01\/ikbel-chaieb.jpg\" alt=\"\" width=\"191\" height=\"191\" srcset=\"https:\/\/realites.com.tn\/fr\/wp-content\/uploads\/2026\/01\/ikbel-chaieb.jpg 300w, https:\/\/realites.com.tn\/fr\/wp-content\/uploads\/2026\/01\/ikbel-chaieb-150x150.jpg 150w\" sizes=\"(max-width: 191px) 100vw, 191px\" \/><\/p>\n<p>Contrairement aux id\u00e9es re\u00e7ues, ces amas naturels jouent un r\u00f4le majeur dans la protection des plages contre l\u2019\u00e9rosion. En s\u2019accumulant sur le littoral, les feuilles de posidonie forment une barri\u00e8re naturelle qui r\u00e9duit l\u2019impact des vagues, notamment en p\u00e9riode hivernale et lors des temp\u00eates. Elles contribuent ainsi \u00e0 la stabilisation du sable et limitent le recul du rivage.<br \/>\nSur le plan \u00e9cologique, la posidonie morte s\u2019inscrit dans le cycle naturel des nutriments. Sa d\u00e9composition progressive lib\u00e8re des \u00e9l\u00e9ments min\u00e9raux essentiels qui enrichissent l\u2019\u00e9cosyst\u00e8me c\u00f4tier. Elle constitue \u00e9galement un habitat temporaire pour de nombreux petits organismes, tels que les insectes, les crustac\u00e9s et les mollusques, qui participent \u00e0 la cha\u00eene alimentaire marine et c\u00f4ti\u00e8re.<br \/>\nLe Dr Ikbel Chaieb rappelle enfin que la pr\u00e9sence de posidonie morte sur les plages n\u2019est pas un signe de pollution, mais au contraire un indicateur de la bonne sant\u00e9 du milieu marin. Sa pr\u00e9servation s\u2019inscrit dans une approche durable de protection du littoral et de la biodiversit\u00e9.<\/p>\n<p><iframe style=\"border: none; overflow: hidden;\" src=\"https:\/\/www.facebook.com\/plugins\/video.php?height=314&amp;href=https%3A%2F%2Fwww.facebook.com%2Freel%2F2416341908806890%2F&amp;show_text=false&amp;width=560&amp;t=0\" width=\"560\" height=\"314\" frameborder=\"0\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le Dr Ikbel Chaieb, chercheur au Centre r\u00e9gional de recherche en horticulture et en agriculture biologique de Chott Meriem (Sousse), a soulign\u00e9 l\u2019importance environnementale des feuilles mortes de posidonie, souvent&hellip;<\/p>\n","protected":false},"author":144,"featured_media":378797,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4,2508],"tags":[9444,9921,3736],"class_list":["post-378796","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-environnement","tag-ikbel-chaieb","tag-posidonie","tag-realites-online"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - 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