{"id":45945,"date":"2025-10-06T16:56:34","date_gmt":"2025-10-06T14:56:34","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=45945"},"modified":"2025-10-06T16:56:34","modified_gmt":"2025-10-06T14:56:34","slug":"stress-hydrique-dans-la-foret-des-microphones-pour-detecter-la-souffrance-des-arbres","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/stress-hydrique-dans-la-foret-des-microphones-pour-detecter-la-souffrance-des-arbres\/","title":{"rendered":"Stress hydrique dans la for\u00eat : des microphones pour d\u00e9tecter la souffrance des arbres"},"content":{"rendered":"<p>Les arbres soumis \u00e0 un stress hydrique \u00e9mettent des sons lorsque leurs conduites d\u2019eau \u00e9clatent. Des microphones \u00e0 ultrasons peuvent capter ces sons et ainsi d\u00e9tecter si les arbres souffrent de dommages permanents li\u00e9s \u00e0 la s\u00e9cheresse. Des chercheurs su\u00e9dois ont r\u00e9ussi pour la premi\u00e8re fois \u00e0 mettre en \u0153uvre cette m\u00e9thode en dehors d\u2019un laboratoire. L\u2019id\u00e9e est de d\u00e9tecter le stress climatique en for\u00eat. Le d\u00e9p\u00e9rissement li\u00e9 \u00e0 la s\u00e9cheresse est tr\u00e8s probablement li\u00e9 au ph\u00e9nom\u00e8ne d\u2019embolie ou \u00ab bulles d\u2019air \u00bb dans le xyl\u00e8me. Les microphones permettent de d\u00e9tecter lorsque les arbres sont touch\u00e9s par une embolie. L\u2019\u00e9tude a \u00e9t\u00e9 men\u00e9e sur des bouleaux et des pins aux stades jeunes. Une partie d\u2019entre eux a \u00e9t\u00e9 arros\u00e9e avec de l\u2019eau normale et l\u2019autre avec une eau trait\u00e9e pour que ses mol\u00e9cules se d\u00e9sagr\u00e8gent et forment des bulles d\u2019air dans le xyl\u00e8me. Les arbres chez lesquels une embolie a \u00e9t\u00e9 provoqu\u00e9e \u00e9mettent plus d\u2019ultrasons que les autres et perdent leur capacit\u00e9 \u00e0 absorber de l\u2019eau. Chez les pins, l\u2019embolie se produisait tant dans le tronc qu\u2019au niveau de la cime alors que chez le bouleau, elle se d\u00e9tectait uniquement dans le tronc. Les chercheurs pr\u00e9voient de travailler sur d\u2019autres esp\u00e8ces et \u00e9galement sur des arbres plus \u00e2g\u00e9s, avec le d\u00e9fi de l\u2019\u00e9corce plus \u00e9paisse \u00e0 relever.<\/p>","protected":false},"excerpt":{"rendered":"<p>Les arbres soumis \u00e0 un stress hydrique \u00e9mettent des sons lorsque leurs conduites d\u2019eau \u00e9clatent. Des microphones \u00e0 ultrasons peuvent capter ces sons et ainsi d\u00e9tecter si les arbres souffrent de dommages permanents li\u00e9s \u00e0 la s\u00e9cheresse. Des chercheurs su\u00e9dois ont r\u00e9ussi pour la premi\u00e8re fois \u00e0 mettre en \u0153uvre cette m\u00e9thode en dehors d\u2019un [&hellip;]<\/p>","protected":false},"featured_media":45936,"template":"","categories":[50],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Stress hydrique dans la for\u00eat : des microphones pour d\u00e9tecter la souffrance des arbres - For\u00eat.Nature<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/foretnature.be\/en\/resume-foret-mail\/stress-hydrique-dans-la-foret-des-microphones-pour-detecter-la-souffrance-des-arbres\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Stress hydrique dans la for\u00eat : des microphones pour d\u00e9tecter la souffrance des arbres - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Les arbres soumis \u00e0 un stress hydrique \u00e9mettent des sons lorsque leurs conduites d\u2019eau \u00e9clatent. Des microphones \u00e0 ultrasons peuvent capter ces sons et ainsi d\u00e9tecter si les arbres souffrent de dommages permanents li\u00e9s \u00e0 la s\u00e9cheresse. Des chercheurs su\u00e9dois ont r\u00e9ussi pour la premi\u00e8re fois \u00e0 mettre en \u0153uvre cette m\u00e9thode en dehors d\u2019un [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/foretnature.be\/en\/resume-foret-mail\/stress-hydrique-dans-la-foret-des-microphones-pour-detecter-la-souffrance-des-arbres\/\" \/>\n<meta property=\"og:site_name\" content=\"For\u00eat.Nature\" \/>\n<meta property=\"og:image\" content=\"https:\/\/foretnature.be\/wp-content\/uploads\/2025\/10\/2695.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"900\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/foretnature.be\/resume-foret-mail\/stress-hydrique-dans-la-foret-des-microphones-pour-detecter-la-souffrance-des-arbres\/\",\"url\":\"https:\/\/foretnature.be\/resume-foret-mail\/stress-hydrique-dans-la-foret-des-microphones-pour-detecter-la-souffrance-des-arbres\/\",\"name\":\"Stress hydrique dans la for\u00eat : des microphones pour d\u00e9tecter la souffrance des arbres - 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