{"id":34234,"date":"2021-09-10T11:45:04","date_gmt":"2021-09-10T09:45:04","guid":{"rendered":"https:\/\/foretnature.be\/resume-foret-mail\/linfluence-de-la-position-sociale-dun-arbre-sur-la-configuration-du-xyleme-cas-du-hetre\/"},"modified":"2021-09-10T11:45:04","modified_gmt":"2021-09-10T09:45:04","slug":"linfluence-de-la-position-sociale-dun-arbre-sur-la-configuration-du-xyleme-cas-du-hetre","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/linfluence-de-la-position-sociale-dun-arbre-sur-la-configuration-du-xyleme-cas-du-hetre\/","title":{"rendered":"L\u2019influence de la position sociale d\u2019un arbre sur la configuration du xyl\u00e8me : cas du h\u00eatre"},"content":{"rendered":"<p>Les classes sociales des arbres selon Kraft : 1 super-dominant ; 2 dominant ; 3 co-dominant ; 4 domin\u00e9;\u00a0\u00a05 compl\u00e8tement domin\u00e9.<br \/>\nLes arbres en sous-bois ont un accroissement de cernes plus faible que celui des arbres se d\u00e9veloppant dans la canop\u00e9e. Au-del\u00e0 de cette information bien connue, il est int\u00e9ressant de savoir quelles en sont les implications sur la structure du xyl\u00e8me (transport de s\u00e8ve brute) ainsi que sur la conductivit\u00e9 hydraulique potentielle de ces arbres de sous-bois.<br \/>\nLes arbres de sous-bois ont un xyl\u00e8me avec des vaisseaux plus nombreux mais de diam\u00e8tres inf\u00e9rieurs aux grands arbres. La structure du xyl\u00e8me de ces arbres est \u00e9galement plus stable due \u00e0 des variations de microclimat plus faibles qu\u2019au niveau de la canop\u00e9e.<br \/>\nContrairement aux id\u00e9es re\u00e7ues, les arbres de sous-bois, une fois mis en lumi\u00e8re, n\u2019atteignent jamais une structure de xyl\u00e8me ainsi qu\u2019une conductivit\u00e9 hydraulique identiques \u00e0 celles des arbres de grandes tailles, m\u00eame s\u2019ils s\u2019en approchent. La taille de l\u2019arbre a ainsi une influence sur la structure du xyl\u00e8me mais \u00e9galement sur sa capacit\u00e9 de r\u00e9action face \u00e0 une ouverture de la canop\u00e9e.<br \/>\nNoyer E. and al, (2016). Xylem traits in European beech (Fagus sylvatica L.) display a large plasticity in response to canopy release. Annals of Forest Science, DOI 10.1007\/s13595-017-0634-1<\/p>","protected":false},"excerpt":{"rendered":"<p>Les classes sociales des arbres selon Kraft : 1 super-dominant ; 2 dominant ; 3 co-dominant ; 4 domin\u00e9;\u00a0\u00a05 compl\u00e8tement domin\u00e9. Les arbres en sous-bois ont un accroissement de cernes plus faible que celui des arbres se d\u00e9veloppant dans la canop\u00e9e. Au-del\u00e0 de cette information bien connue, il est int\u00e9ressant de savoir quelles en sont [&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\u2019influence de la position sociale d\u2019un arbre sur la configuration du xyl\u00e8me : cas du h\u00eatre - 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\/linfluence-de-la-position-sociale-dun-arbre-sur-la-configuration-du-xyleme-cas-du-hetre\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L\u2019influence de la position sociale d\u2019un arbre sur la configuration du xyl\u00e8me : cas du h\u00eatre - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Les classes sociales des arbres selon Kraft : 1 super-dominant ; 2 dominant ; 3 co-dominant ; 4 domin\u00e9;\u00a0\u00a05 compl\u00e8tement domin\u00e9. Les arbres en sous-bois ont un accroissement de cernes plus faible que celui des arbres se d\u00e9veloppant dans la canop\u00e9e. 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