{"id":39985,"date":"2023-10-09T16:41:01","date_gmt":"2023-10-09T14:41:01","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=39985"},"modified":"2023-10-10T10:19:22","modified_gmt":"2023-10-10T08:19:22","slug":"le-role-tampon-des-forets-plus-efficace-sur-substrats-calcaires","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/le-role-tampon-des-forets-plus-efficace-sur-substrats-calcaires\/","title":{"rendered":"Le r\u00f4le \u00ab tampon \u00bb des for\u00eats, plus efficace sur substrats calcaires"},"content":{"rendered":"<p>Les \u00e9cosyst\u00e8mes forestiers jouent un r\u00f4le tampon vis-\u00e0-vis des micro-habitats du sous-\u00e9tage et,dans un monde qui se r\u00e9chauffe, fournissent des refuges aux esp\u00e8ces qui y sont inf\u00e9od\u00e9es. Ces effets d\u00e9pendent de la structure et de la gestion foresti\u00e8re. Cependant, le r\u00f4le des sols et de la roche-m\u00e8re est moins connu, alors qu\u2019ils ont \u00e9galement un impact sur la complexit\u00e9 de la structure de la for\u00eat.<\/p>\n<p>Cette \u00e9tude a \u00e9valu\u00e9 les diff\u00e9rences en termes d\u2019effet tampon des for\u00eats de feuillus sur des sols calcaires et siliceux. Six esp\u00e8ces ont \u00e9t\u00e9 transplant\u00e9es durant des ann\u00e9es s\u00e8ches et humides dans des trou\u00e9es et sous couvert sur les deux types de sol. La survie des plantations, la transmission de la lumi\u00e8re, la temp\u00e9rature de l&rsquo;air et le d\u00e9ficit de pression de vapeur (diff\u00e9rence entre la quantit\u00e9 d\u2019eau pr\u00e9sente dans l\u2019atmosph\u00e8re et la quantit\u00e9 d\u2019eau que l\u2019atmosph\u00e8re pourrait contenir \u00e0 saturation) ont \u00e9t\u00e9 mesur\u00e9s dans tous les traitements. La structure de la for\u00eat et les param\u00e8tres du sol ont \u00e9galement \u00e9t\u00e9 quantifi\u00e9s sur les deux types de substrat.<\/p>\n<p>\u00b7 La structure foresti\u00e8re est consid\u00e9r\u00e9e comme plus complexe sur sol calcaire que sur sols siliceux. Cela induit une lumi\u00e8re plus diffuse transmise en sous \u00e9tage des contextes calcaires.<br \/>\n\u00b7 L&rsquo;humidit\u00e9 de l&rsquo;air \u00e9tait plus \u00e9lev\u00e9e dans le sous-\u00e9tage des for\u00eats calcaires. A l&rsquo;inverse, la temp\u00e9rature maximale de l&rsquo;air et le d\u00e9ficit de pression de vapeur \u00e9tait plus bas dans les for\u00eats calcaires. Enfin, la quantit\u00e9 de nutriments \u00e9tait plus faible dans les sols siliceux et le sol y \u00e9tait plus sec.<br \/>\n\u00b7 Pendant les ann\u00e9es s\u00e8ches, la canop\u00e9e des for\u00eats calcaires a jou\u00e9 un r\u00f4le de facilitation pour l\u2019installation des plants transplant\u00e9s, notamment dans les habitats les plus ombrag\u00e9s.<\/p>\n<p>Les for\u00eats calcaires ont une meilleure capacit\u00e9 \u00e0 jouer un r\u00f4le de tampon que les for\u00eats siliceuses : les dominantes ligneuses calcaires ont des effets facilitateurs plus \u00e9lev\u00e9s et, naturellement, la survie en milieu ouvert (calcaire) est plus faible au cours des ann\u00e9es s\u00e8ches.<\/p>","protected":false},"excerpt":{"rendered":"<p>Les \u00e9cosyst\u00e8mes forestiers jouent un r\u00f4le tampon vis-\u00e0-vis des micro-habitats du sous-\u00e9tage et,dans un monde qui se r\u00e9chauffe, fournissent des refuges aux esp\u00e8ces qui y sont inf\u00e9od\u00e9es. Ces effets d\u00e9pendent de la structure et de la gestion foresti\u00e8re. Cependant, le r\u00f4le des sols et de la roche-m\u00e8re est moins connu, alors qu\u2019ils ont \u00e9galement un [&hellip;]<\/p>","protected":false},"featured_media":39993,"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>Le r\u00f4le \u00ab tampon \u00bb des for\u00eats, plus efficace sur substrats calcaires - 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\/le-role-tampon-des-forets-plus-efficace-sur-substrats-calcaires\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le r\u00f4le \u00ab tampon \u00bb des for\u00eats, plus efficace sur substrats calcaires - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Les \u00e9cosyst\u00e8mes forestiers jouent un r\u00f4le tampon vis-\u00e0-vis des micro-habitats du sous-\u00e9tage et,dans un monde qui se r\u00e9chauffe, fournissent des refuges aux esp\u00e8ces qui y sont inf\u00e9od\u00e9es. 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