{"id":35016,"date":"2022-01-13T14:33:53","date_gmt":"2022-01-13T13:33:53","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=35016"},"modified":"2022-01-13T14:33:53","modified_gmt":"2022-01-13T13:33:53","slug":"comment-la-sylviculture-peut-donner-un-petit-coup-de-pouce-a-la-genetique-pour-sadapter-aux-changements-climatiques","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/comment-la-sylviculture-peut-donner-un-petit-coup-de-pouce-a-la-genetique-pour-sadapter-aux-changements-climatiques\/","title":{"rendered":"Comment la sylviculture peut donner un petit coup de pouce \u00e0 la g\u00e9n\u00e9tique pour s\u2019adapter aux changements climatiques ?"},"content":{"rendered":"<p>Dans le contexte des changements climatiques, la capacit\u00e9 d\u2019adaptation des for\u00eats repr\u00e9sente un enjeu majeur. Le potentiel d\u2019adaptation g\u00e9n\u00e9tique des populations d\u2019arbres est tr\u00e8s \u00e9lev\u00e9 et nos choix de sylviculture peuvent avoir un impact positif ou n\u00e9gatif non n\u00e9gligeable.<\/p>\n<p>R\u00e9duire le stress d\u2019un peuplement, par exemple en diminuant sa densit\u00e9 pour att\u00e9nuer l\u2019impact d\u2019une s\u00e9cheresse, va permettre la survie des arbres conserv\u00e9s mais va r\u00e9duire les possibilit\u00e9s de s\u00e9lection et n\u2019exploitera pas le potentiel d\u2019acclimatation aux stress futurs. Raccourcir les r\u00e9volutions va r\u00e9duire la probabilit\u00e9 d\u2019exposition au risque mais peut augmenter la vuln\u00e9rabilit\u00e9 du peuplement si cela s\u2019accompagne d\u2019une s\u00e9lection en faveur d\u2019individus \u00e0 plus grande vigueur juv\u00e9nile et si celle-ci est n\u00e9gativement corr\u00e9l\u00e9e \u00e0 la r\u00e9sistance au stress. De m\u00eame, des coupes importantes, pour raison sanitaire ou de risque incendie, peuvent entra\u00eener l\u2019\u00e9limination de g\u00e9notypes r\u00e9sistants et r\u00e9duire les chances d\u2019\u00e9volution vers des populations r\u00e9sistantes.<\/p>\n<p>L\u2019enjeu est donc \u00e0 la fois d\u2019augmenter les chances d\u2019\u00e9mergence de combinaisons g\u00e9notypiques favorables, de faciliter la propagation des g\u00e9notypes les mieux adapt\u00e9s et de pr\u00e9server la diversit\u00e9 g\u00e9n\u00e9tique comme r\u00e9servoir d\u2019options futures pour r\u00e9pondre aux changements inattendus. Le sujet est vaste et complexe, et de nombreuses exp\u00e9rimentations doivent encore \u00eatre men\u00e9es sur le long terme. Dans l\u2019\u00e9tat actuel des connaissances les auteurs de l\u2019article proposent d\u2019exp\u00e9rimenter un ensemble d\u2019options de gestion sylvicole \u00ab par et pour l\u2019\u00e9volution \u00bb qui tendent \u00e0 favoriser le taux d\u2019\u00e9volution des populations d\u2019arbres. Ces propositions s\u2019envisagent dans le cadre de peuplements r\u00e9g\u00e9n\u00e9r\u00e9s naturellement.<\/p>","protected":false},"excerpt":{"rendered":"<p>Dans le contexte des changements climatiques, la capacit\u00e9 d\u2019adaptation des for\u00eats repr\u00e9sente un enjeu majeur. Le potentiel d\u2019adaptation g\u00e9n\u00e9tique des populations d\u2019arbres est tr\u00e8s \u00e9lev\u00e9 et nos choix de sylviculture peuvent avoir un impact positif ou n\u00e9gatif non n\u00e9gligeable. R\u00e9duire le stress d\u2019un peuplement, par exemple en diminuant sa densit\u00e9 pour att\u00e9nuer l\u2019impact d\u2019une s\u00e9cheresse, [&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>Comment la sylviculture peut donner un petit coup de pouce \u00e0 la g\u00e9n\u00e9tique pour s\u2019adapter aux changements climatiques ? - 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\/comment-la-sylviculture-peut-donner-un-petit-coup-de-pouce-a-la-genetique-pour-sadapter-aux-changements-climatiques\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comment la sylviculture peut donner un petit coup de pouce \u00e0 la g\u00e9n\u00e9tique pour s\u2019adapter aux changements climatiques ? - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Dans le contexte des changements climatiques, la capacit\u00e9 d\u2019adaptation des for\u00eats repr\u00e9sente un enjeu majeur. 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