{"id":38631,"date":"2023-02-15T15:15:34","date_gmt":"2023-02-15T14:15:34","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=38631"},"modified":"2023-02-27T09:59:35","modified_gmt":"2023-02-27T08:59:35","slug":"densite-bois-diminue","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/densite-bois-diminue\/","title":{"rendered":"La densit\u00e9 du bois a diminu\u00e9 dans les for\u00eats europ\u00e9ennes depuis 1950"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">En observant la biomasse de 3 699 tiges de pin sylvestre, d&rsquo;\u00e9pic\u00e9a commun et de bouleau verruqueux r\u00e9partis dans toute l\u2019Europe depuis 1950, des chercheurs russes d\u00e9montrent que ces esp\u00e8ces d&rsquo;arbres pr\u00e9sentent une r\u00e9duction de la biomasse et de la densit\u00e9 du bois.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Entre 1950 et 2020, la biomasse de 1 m\u00b3 de tige avec \u00e9corce a diminu\u00e9 en moyenne de 80 kg (-17 %) pour le pin sylvestre, de 105 kg (-22 %) pour l&rsquo;\u00e9pic\u00e9a et de 92 kg (-15 %) pour le bouleau. Les chercheurs lient ces observations aux changements climatiques, et notamment aux modifications chimiques de l\u2019atmosph\u00e8re ainsi que des r\u00e9gimes de temp\u00e9ratures et de pr\u00e9cipitations.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><span style=\"font-weight: 400;\">Ces observations ont potentiellement des impacts sur la sylviculture et l&rsquo;industrie du bois. Une diminution de la densit\u00e9 du bois entra\u00eene une baisse de sa rigidit\u00e9 et de sa r\u00e9sistance, et donc un impact n\u00e9gatif sur la production de mat\u00e9riaux de construction et de meubles. Idem pour le pouvoir calorifique et la valeur thermique du bois. M\u00eame si la diminution de la densit\u00e9 du bois est mod\u00e9r\u00e9e, elle d\u00e9passe l&rsquo;effet positif de l&rsquo;acc\u00e9l\u00e9ration de la croissance des arbres, entra\u00eenant donc \u00e9galement une incertitude sur la comptabilisation du carbone forestier.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>En observant la biomasse de 3 699 tiges de pin sylvestre, d&rsquo;\u00e9pic\u00e9a commun et de bouleau verruqueux r\u00e9partis dans toute l\u2019Europe depuis 1950, des chercheurs russes d\u00e9montrent que ces esp\u00e8ces d&rsquo;arbres pr\u00e9sentent une r\u00e9duction de la biomasse et de la densit\u00e9 du bois.\u00a0 Entre 1950 et 2020, la biomasse de 1 m\u00b3 de tige avec [&hellip;]<\/p>","protected":false},"featured_media":38632,"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 densit\u00e9 du bois a diminu\u00e9 dans les for\u00eats europ\u00e9ennes depuis 1950 - 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\/densite-bois-diminue\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La densit\u00e9 du bois a diminu\u00e9 dans les for\u00eats europ\u00e9ennes depuis 1950 - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"En observant la biomasse de 3 699 tiges de pin sylvestre, d&rsquo;\u00e9pic\u00e9a commun et de bouleau verruqueux r\u00e9partis dans toute l\u2019Europe depuis 1950, des chercheurs russes d\u00e9montrent que ces esp\u00e8ces d&rsquo;arbres pr\u00e9sentent une r\u00e9duction de la biomasse et de la densit\u00e9 du bois.\u00a0 Entre 1950 et 2020, la biomasse de 1 m\u00b3 de tige avec [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/foretnature.be\/en\/resume-foret-mail\/densite-bois-diminue\/\" \/>\n<meta property=\"og:site_name\" content=\"For\u00eat.Nature\" \/>\n<meta property=\"article:modified_time\" content=\"2023-02-27T08:59:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/foretnature.be\/wp-content\/uploads\/2023\/02\/AdobeStock_396663869-1024x683.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"683\" \/>\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\/en\/resume-foret-mail\/densite-bois-diminue\/\",\"url\":\"https:\/\/foretnature.be\/en\/resume-foret-mail\/densite-bois-diminue\/\",\"name\":\"La densit\u00e9 du bois a diminu\u00e9 dans les for\u00eats europ\u00e9ennes depuis 1950 - For\u00eat.Nature\",\"isPartOf\":{\"@id\":\"https:\/\/foretnature.be\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/foretnature.be\/en\/resume-foret-mail\/densite-bois-diminue\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/foretnature.be\/en\/resume-foret-mail\/densite-bois-diminue\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/foretnature.be\/wp-content\/uploads\/2023\/02\/AdobeStock_396663869.jpeg\",\"datePublished\":\"2023-02-15T14:15:34+00:00\",\"dateModified\":\"2023-02-27T08:59:35+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/foretnature.be\/en\/resume-foret-mail\/densite-bois-diminue\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/foretnature.be\/en\/resume-foret-mail\/densite-bois-diminue\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\/\/foretnature.be\/en\/resume-foret-mail\/densite-bois-diminue\/#primaryimage\",\"url\":\"https:\/\/foretnature.be\/wp-content\/uploads\/2023\/02\/AdobeStock_396663869.jpeg\",\"contentUrl\":\"https:\/\/foretnature.be\/wp-content\/uploads\/2023\/02\/AdobeStock_396663869.jpeg\",\"width\":1600,\"height\":1067,\"caption\":\"Empty autumn road with bright mixed forest; 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