{"id":34984,"date":"2021-11-19T16:44:25","date_gmt":"2021-11-19T15:44:25","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=34984"},"modified":"2021-11-19T16:44:25","modified_gmt":"2021-11-19T15:44:25","slug":"limportance-des-insectes-dans-la-decomposition-du-bois-mort-en-foret","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/limportance-des-insectes-dans-la-decomposition-du-bois-mort-en-foret\/","title":{"rendered":"L\u2019importance des insectes dans la d\u00e9composition du bois mort en for\u00eat"},"content":{"rendered":"<p>La d\u00e9composition du bois mort en for\u00eat d\u00e9pend des groupes de d\u00e9composeurs (micro-organismes et insectes) qui d\u00e9pendent eux-m\u00eames du climat. \u00c0 l\u2019\u00e9chelle mondiale, on estime que 8 % du carbone des for\u00eats se retrouve sous forme de bois mort. Afin de mieux comprendre ces ph\u00e9nom\u00e8nes de d\u00e9composition, une large exp\u00e9rience de terrain a eu lieu sur cinquante-cinq sites et six continents. Il a \u00e9t\u00e9 d\u00e9montr\u00e9 que les taux de d\u00e9composition augmentent avec la temp\u00e9rature et ce d\u2019autant plus que les taux de pr\u00e9cipitations sont \u00e9lev\u00e9s. En effet, ces derniers affectent n\u00e9gativement les taux de d\u00e9composition quand les temp\u00e9ratures sont basses et positivement lorsqu\u2019elles sont \u00e9lev\u00e9es. Il a \u00e9galement \u00e9t\u00e9 prouv\u00e9 que les insectes acc\u00e9l\u00e8rent la d\u00e9composition dans les for\u00eats tropicales avec 3,9 % de perte de masse m\u00e9diane par an, ce qui inclut la consommation directe par les insectes ainsi que les effets indirects via les interactions avec les micro-organismes. L\u2019effet est moins marqu\u00e9 dans les for\u00eats temp\u00e9r\u00e9es et bor\u00e9ales o\u00f9 les pertes de masse m\u00e9diane sont respectivement de \u00e0 0,9 et 0,1 % par an. \u00c0 la suite d\u2019autres analyses, une estimation selon laquelle 10,9 (\u00b1 3,2) milliards de tonnes de carbone sont lib\u00e9r\u00e9s par an par le bois mort dans le monde a \u00e9t\u00e9 r\u00e9alis\u00e9e, dont 93 % proviennent des for\u00eats tropicales. De fa\u00e7on plus globale, les insectes ont une grande importance fonctionnelle dans la d\u00e9composition du bois mort et le cycle du bois mort.<\/p>","protected":false},"excerpt":{"rendered":"<p>La d\u00e9composition du bois mort en for\u00eat d\u00e9pend des groupes de d\u00e9composeurs (micro-organismes et insectes) qui d\u00e9pendent eux-m\u00eames du climat. \u00c0 l\u2019\u00e9chelle mondiale, on estime que 8 % du carbone des for\u00eats se retrouve sous forme de bois mort. Afin de mieux comprendre ces ph\u00e9nom\u00e8nes de d\u00e9composition, une large exp\u00e9rience de terrain a eu lieu [&hellip;]<\/p>","protected":false},"featured_media":0,"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>L\u2019importance des insectes dans la d\u00e9composition du bois mort en 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\/limportance-des-insectes-dans-la-decomposition-du-bois-mort-en-foret\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L\u2019importance des insectes dans la d\u00e9composition du bois mort en for\u00eat - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"La d\u00e9composition du bois mort en for\u00eat d\u00e9pend des groupes de d\u00e9composeurs (micro-organismes et insectes) qui d\u00e9pendent eux-m\u00eames du climat. \u00c0 l\u2019\u00e9chelle mondiale, on estime que 8 % du carbone des for\u00eats se retrouve sous forme de bois mort. 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