{"id":34637,"date":"2021-09-10T11:46:18","date_gmt":"2021-09-10T09:46:18","guid":{"rendered":"https:\/\/foretnature.be\/resume-foret-mail\/quelle-regeneration-apres-la-formation-de-trouees-dans-le-sous-etage\/"},"modified":"2021-09-10T11:46:18","modified_gmt":"2021-09-10T09:46:18","slug":"quelle-regeneration-apres-la-formation-de-trouees-dans-le-sous-etage","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/quelle-regeneration-apres-la-formation-de-trouees-dans-le-sous-etage\/","title":{"rendered":"Quelle r\u00e9g\u00e9n\u00e9ration apr\u00e8s la formation de trou\u00e9es dans le sous-\u00e9tage ?"},"content":{"rendered":"<p>Une \u00e9tude allemande, publi\u00e9e au d\u00e9but de l\u2019\u00e9t\u00e9 2020, s\u2019est int\u00e9ress\u00e9e \u00e0 la structure et la croissance en hauteur de la r\u00e9g\u00e9n\u00e9ration des arbres dans dix-sept trou\u00e9es du sous-\u00e9tage d\u2019une for\u00eat vierge de h\u00eatre en Slovaquie. La densit\u00e9 des jeunes pousses, leur croissance en longueur et la biomasse cumulative au sein de ces zones ouvertes ont \u00e9t\u00e9 analys\u00e9es et compar\u00e9es avec une r\u00e9g\u00e9n\u00e9ration en conditions de canop\u00e9e ferm\u00e9e.<br \/>\nLes r\u00e9sultats montrent que la densit\u00e9 en jeunes arbres et la biomasse \u00e9taient nettement plus \u00e9lev\u00e9es dans les trou\u00e9es que sous une couverture foresti\u00e8re compl\u00e8te. La densit\u00e9 en jeunes arbres est positivement influenc\u00e9e par un rayonnement direct \u00e9lev\u00e9 et faiblement diffus. Ceci entra\u00eene des diff\u00e9rences spatiales importantes dans la trou\u00e9e. Par contre, la croissance en longueur des jeunes pousses est positivement corr\u00e9l\u00e9e \u00e0 un rayonnement diffus plus important, alors que le rayonnement direct n\u2019a pas eu d\u2019influence, citent les chercheurs.<br \/>\nIls en tirent comme conclusions que, dans cette for\u00eat, la r\u00e9g\u00e9n\u00e9ration est probablement supprim\u00e9e rapidement par l\u2019expansion lat\u00e9rale de la canop\u00e9e dans les petites trou\u00e9es de moins de 100 m\u00b2, menant \u00e0 un sous-bois h\u00e9t\u00e9rog\u00e8ne. Dans les trou\u00e9es plus vastes, les jeunes arbres sont capables de combler l\u2019espace m\u00eame \u00e0 faible densit\u00e9, menant \u00e0 une r\u00e9g\u00e9n\u00e9ration plut\u00f4t homog\u00e8ne. Une mixit\u00e9 de taille des trou\u00e9es favorise donc l\u2019h\u00e9t\u00e9rog\u00e9n\u00e9it\u00e9 spatiale en impactant la structure de la canop\u00e9e r\u00e9sultante de diff\u00e9rentes mani\u00e8res.<br \/>\nFeldmann E. et al. (2020). Regeneration Dynamics Following the Formation of Understory Gaps in a Slovakian Beech Virgin Forest. Forests 11, 585.<\/p>","protected":false},"excerpt":{"rendered":"<p>Une \u00e9tude allemande, publi\u00e9e au d\u00e9but de l\u2019\u00e9t\u00e9 2020, s\u2019est int\u00e9ress\u00e9e \u00e0 la structure et la croissance en hauteur de la r\u00e9g\u00e9n\u00e9ration des arbres dans dix-sept trou\u00e9es du sous-\u00e9tage d\u2019une for\u00eat vierge de h\u00eatre en Slovaquie. La densit\u00e9 des jeunes pousses, leur croissance en longueur et la biomasse cumulative au sein de ces zones ouvertes [&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>Quelle r\u00e9g\u00e9n\u00e9ration apr\u00e8s la formation de trou\u00e9es dans le sous-\u00e9tage ? - 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\/quelle-regeneration-apres-la-formation-de-trouees-dans-le-sous-etage\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Quelle r\u00e9g\u00e9n\u00e9ration apr\u00e8s la formation de trou\u00e9es dans le sous-\u00e9tage ? - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Une \u00e9tude allemande, publi\u00e9e au d\u00e9but de l\u2019\u00e9t\u00e9 2020, s\u2019est int\u00e9ress\u00e9e \u00e0 la structure et la croissance en hauteur de la r\u00e9g\u00e9n\u00e9ration des arbres dans dix-sept trou\u00e9es du sous-\u00e9tage d\u2019une for\u00eat vierge de h\u00eatre en Slovaquie. 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