{"id":45187,"date":"2025-04-07T16:04:25","date_gmt":"2025-04-07T14:04:25","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=45187"},"modified":"2025-04-07T16:04:25","modified_gmt":"2025-04-07T14:04:25","slug":"la-richesse-en-essences-optimise-leffet-tampon-de-la-foret","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/la-richesse-en-essences-optimise-leffet-tampon-de-la-foret\/","title":{"rendered":"La richesse en essences optimise l\u2019effet tampon de la for\u00eat"},"content":{"rendered":"<p>Une \u00e9tude r\u00e9cente sur le couvert forestier a montr\u00e9 que la richesse en essences a un impact significatif sur l\u2019efficacit\u00e9 de l\u2019effet tampon par rapport aux temp\u00e9ratures minimales et maximales de l\u2019air au sein du peuplement.<\/p>\n<ul>\n<li>L\u2019effet tampon est le plus notable en \u00e9t\u00e9 bien qu\u2019il soit mis en \u00e9vidence durant tous les mois de l\u2019ann\u00e9e.<\/li>\n<li>Il est plus marqu\u00e9 pour diminuer les temp\u00e9ratures maximales qu\u2019augmenter celles minimales.<\/li>\n<li>En moyenne un peuplement m\u00e9lang\u00e9 (jusqu\u2019\u00e0 24 esp\u00e8ces), peut engendrer une baisse de temp\u00e9rature de -2,5 \u00b0C \u00b1 0,2 \u00b0C (en \u00e9t\u00e9) et une hausse de +0,4 \u00b0C \u00b1 0,04 \u00b0C (en hiver) par rapport \u00e0 un peuplement monosp\u00e9cifique<\/li>\n<li>L\u2019effet maximal observ\u00e9 est de &#8211; 4,4 \u00b0C \u00b1 0,6 \u00b0C (\u00e9t\u00e9, pic) et une hausse de +1,1 \u00b0C \u00b1 0,2 \u00b0C (hiver, pic) pour un peuplement m\u00e9lang\u00e9 par rapport \u00e0 un peuplement monosp\u00e9cifique<\/li>\n<\/ul>\n<p>L\u2019impact de la richesse en esp\u00e8ces sur la temp\u00e9rature a \u00e9t\u00e9 \u00e9valu\u00e9 gr\u00e2ce \u00e0 plusieurs indices :<\/p>\n<ul>\n<li>La hauteur moyenne qui ne semble pas avoir d\u2019effet significatif.<\/li>\n<li>L\u2019indice de surface foliaire (LAI) : le LAI augmente avec la richesse en esp\u00e8ces. Une canop\u00e9e plus dense r\u00e9duit la p\u00e9n\u00e9tration de la chaleur en \u00e9t\u00e9 et retient la chaleur en hiver. Cet effet est particuli\u00e8rement fort pendant la saison de croissance, o\u00f9 le feuillage est maximal.<\/li>\n<li>L\u2019indice de complexit\u00e9 structurelle du peuplement (SSCI) : le SSCI repr\u00e9sente la complexit\u00e9 en hauteur et en volume des \u00e9l\u00e9ments de la canop\u00e9e (branches, troncs, etc.). Plus il y a de diversit\u00e9 structurelle, plus il y a de microzones thermiques, favorisant une meilleure isolation thermique globale. Le SSCI est surtout important en dehors de la saison de croissance, quand les feuillus ont perdu leurs feuilles.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Une \u00e9tude r\u00e9cente sur le couvert forestier a montr\u00e9 que la richesse en essences a un impact significatif sur l\u2019efficacit\u00e9 de l\u2019effet tampon par rapport aux temp\u00e9ratures minimales et maximales de l\u2019air au sein du peuplement. L\u2019effet tampon est le plus notable en \u00e9t\u00e9 bien qu\u2019il soit mis en \u00e9vidence durant tous les mois de [&hellip;]<\/p>","protected":false},"featured_media":45174,"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>La richesse en essences optimise l\u2019effet tampon de la for\u00eat - 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\/la-richesse-en-essences-optimise-leffet-tampon-de-la-foret\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La richesse en essences optimise l\u2019effet tampon de la for\u00eat - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Une \u00e9tude r\u00e9cente sur le couvert forestier a montr\u00e9 que la richesse en essences a un impact significatif sur l\u2019efficacit\u00e9 de l\u2019effet tampon par rapport aux temp\u00e9ratures minimales et maximales de l\u2019air au sein du peuplement. 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