{"id":33317,"date":"2021-07-19T08:43:08","date_gmt":"2021-07-19T06:43:08","guid":{"rendered":"https:\/\/gjkkadksm.preview.infomaniak.website\/?post_type=resume-foret-mail&#038;p=33317"},"modified":"2021-07-19T08:43:08","modified_gmt":"2021-07-19T06:43:08","slug":"le-bouleau-un-grand-frere-pour-lepicea","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/le-bouleau-un-grand-frere-pour-lepicea\/","title":{"rendered":"Le bouleau, un grand fr\u00e8re pour l\u2019\u00e9pic\u00e9a"},"content":{"rendered":"<p class=\"text-build-content\" data-testid=\"PZFQT9T3_T\">\u00c0 l&rsquo;\u00c9cole Polytechnique F\u00e9d\u00e9rale de Zurich (EPFZ-ETH), un m\u00e9moire de master (Imhof 2020) s\u2019est int\u00e9ress\u00e9 aux effets des for\u00eats pionni\u00e8res de bouleaux sur le d\u00e9veloppement d\u2019\u00e9pic\u00e9as poussant dans le sous-\u00e9tage. Concr\u00e8tement, des peuplements non-trait\u00e9s s\u2019\u00e9tant d\u00e9velopp\u00e9s sur d\u2019anciennes prairies ont \u00e9t\u00e9 \u00e9valu\u00e9s selon cinq modalit\u00e9s : la premi\u00e8re \u00e9tait un peuplement o\u00f9 la proportion d\u2019\u00e9pic\u00e9as \u00e9tait de 90 % pour 10 % de bouleaux (sans d\u00e9veloppement de for\u00eat pionni\u00e8re) et a \u00e9t\u00e9 prise comme r\u00e9f\u00e9rence. Les quatre autres modalit\u00e9s pr\u00e9sentent des pourcentages d\u00e9croissant en proportion d\u2019\u00e9pic\u00e9as.<\/p>\n<p class=\"text-build-content\" data-testid=\"PZFQT9T3_T\">Les r\u00e9sultats n\u2019ont pas d\u00e9montr\u00e9 une influence significative des for\u00eats pionni\u00e8res de bouleaux sur le nombre de bris de cime. Il a aussi \u00e9t\u00e9 d\u00e9montr\u00e9 que des facteurs comme le nombre de tiges en g\u00e9n\u00e9ral et la pente influencent davantage le coefficient d\u2019\u00e9lancement des \u00e9pic\u00e9as que la proportion de bouleaux. De plus, les for\u00eats pionni\u00e8res de bouleaux semblent avoir un effet positif sur la longueur de la couronne. Il a \u00e9t\u00e9 montr\u00e9 qu\u2019une proportion \u00e9lev\u00e9e de bouleaux favorise la conservation des lisi\u00e8res vertes. Enfin, les r\u00e9sultats montrent que plus la proportion de bouleaux dans le peuplement est \u00e9lev\u00e9e, plus les interventions sylvicoles peuvent \u00eatre retard\u00e9es. En effet, lorsque la proportion de bouleaux dans le perchis est \u00e9gale \u00e0 40 %, la densit\u00e9 d\u2019\u00e9pic\u00e9as est d\u00e9j\u00e0 trop importante. Et lorsque cette proportion monte \u00e0 80 % et plus, il est probable qu\u2019aucune intervention sylvicole ne soit n\u00e9cessaire pour conserver la structuration souhait\u00e9e. De l\u00e0, il a \u00e9t\u00e9 estim\u00e9 que les interventions peuvent attendre aussi longtemps que les bouleaux restent dominants dans le peuplement.<\/p>\n<p class=\"text-build-content\" data-testid=\"PZFQT9T3_T\">En conclusion, les for\u00eats pionni\u00e8res de bouleaux sont une excellente opportunit\u00e9 d\u2019exploiter le ph\u00e9nom\u00e8ne d\u2019automation biologique dont il serait dommage de se priver.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u00c0 l&rsquo;\u00c9cole Polytechnique F\u00e9d\u00e9rale de Zurich (EPFZ-ETH), un m\u00e9moire de master (Imhof 2020) s\u2019est int\u00e9ress\u00e9 aux effets des for\u00eats pionni\u00e8res de bouleaux sur le d\u00e9veloppement d\u2019\u00e9pic\u00e9as poussant dans le sous-\u00e9tage. Concr\u00e8tement, des peuplements non-trait\u00e9s s\u2019\u00e9tant d\u00e9velopp\u00e9s sur d\u2019anciennes prairies ont \u00e9t\u00e9 \u00e9valu\u00e9s selon cinq modalit\u00e9s : la premi\u00e8re \u00e9tait un peuplement o\u00f9 la proportion d\u2019\u00e9pic\u00e9as [&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>Le bouleau, un grand fr\u00e8re pour l\u2019\u00e9pic\u00e9a - 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-bouleau-un-grand-frere-pour-lepicea\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le bouleau, un grand fr\u00e8re pour l\u2019\u00e9pic\u00e9a - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"\u00c0 l&rsquo;\u00c9cole Polytechnique F\u00e9d\u00e9rale de Zurich (EPFZ-ETH), un m\u00e9moire de master (Imhof 2020) s\u2019est int\u00e9ress\u00e9 aux effets des for\u00eats pionni\u00e8res de bouleaux sur le d\u00e9veloppement d\u2019\u00e9pic\u00e9as poussant dans le sous-\u00e9tage. 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