{"id":34274,"date":"2021-09-10T11:45:12","date_gmt":"2021-09-10T09:45:12","guid":{"rendered":"https:\/\/foretnature.be\/resume-foret-mail\/la-presence-dongules-engendre-une-homogeneisation-de-la-vegetation-en-foret\/"},"modified":"2021-09-10T11:45:12","modified_gmt":"2021-09-10T09:45:12","slug":"la-presence-dongules-engendre-une-homogeneisation-de-la-vegetation-en-foret","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/la-presence-dongules-engendre-une-homogeneisation-de-la-vegetation-en-foret\/","title":{"rendered":"La pr\u00e9sence d\u2019ongul\u00e9s engendre une homog\u00e9n\u00e9isation de la v\u00e9g\u00e9tation en for\u00eat"},"content":{"rendered":"

Exclure les ongul\u00e9s de certaines parcelles foresti\u00e8res a-t-il un impact sur la richesse sp\u00e9cifique en plantes et l\u2019\u00e9tendue du couvert v\u00e9g\u00e9tal ? Les diff\u00e9rentes strates r\u00e9pondent-elles de la m\u00eame mani\u00e8re aux impacts de la pr\u00e9sence d\u2019ongul\u00e9s ?
\nUne r\u00e9cente \u00e9tude men\u00e9e dans 82 stations de for\u00eats publiques matures en France s\u2019est pench\u00e9e sur ces questions, analysant les changements dans la v\u00e9g\u00e9tation \u00e0 l\u2019int\u00e9rieur d\u2019enclos (excluant les ongul\u00e9s) par rapport aux contr\u00f4les ext\u00e9rieurs. Des donn\u00e9es botaniques r\u00e9colt\u00e9es sur une p\u00e9riode de 10 ans ont \u00e9t\u00e9 utilis\u00e9es pour mener \u00e0 bien ces recherches.
\nL\u2019hypoth\u00e8se principale \u00e9tait que par leur consommation s\u00e9lective d\u2019arbustes, les mammif\u00e8res en question contribuent \u00e0 une plus grande p\u00e9n\u00e9tration de lumi\u00e8re dans le bois, et donc \u00e0 un meilleur d\u00e9veloppement d\u2019esp\u00e8ces v\u00e9g\u00e9tales tr\u00e8s exigeantes en soleil. Les r\u00e9sultats confirment clairement ce postulat de base.
\nEn dehors des enclos, les ongul\u00e9s forestiers maintiennent une richesse sp\u00e9cifique plus importante au sein de la strate herbac\u00e9e. Toutefois, les esp\u00e8ces encourag\u00e9es ne sont pas des plantes proprement foresti\u00e8res. On assiste \u00e0 une homog\u00e9n\u00e9isation de la v\u00e9g\u00e9tation, accrue par le fait que les ongul\u00e9s jouent le r\u00f4le de disperseur pour les esp\u00e8ces v\u00e9g\u00e9tales non-foresti\u00e8res. Ils favorisent ainsi l\u2019immigration d\u2019esp\u00e8ces non li\u00e9es aux habitats forestiers dans les for\u00eats au d\u00e9triment des plantes strictement foresti\u00e8res. Parmi les diff\u00e9rentes stations \u00e9tudi\u00e9es, les changements de composition dans la v\u00e9g\u00e9tation varient en fonction de l\u2019abondance en cerfs. Dans les enclos, une des plantes le plus favoris\u00e9e est la ronce.
\nBoulanger V., Dupouey J-L., Archaux F., et al. (2017). Ungulates increase forest plant species richness to the benefit of non-forest specialists. Global Change Biology\u00a023\/10. DOI: 10.1111\/gcb.13899<\/p>","protected":false},"excerpt":{"rendered":"

Exclure les ongul\u00e9s de certaines parcelles foresti\u00e8res a-t-il un impact sur la richesse sp\u00e9cifique en plantes et l\u2019\u00e9tendue du couvert v\u00e9g\u00e9tal ? Les diff\u00e9rentes strates r\u00e9pondent-elles de la m\u00eame mani\u00e8re aux impacts de la pr\u00e9sence d\u2019ongul\u00e9s ? Une r\u00e9cente \u00e9tude men\u00e9e dans 82 stations de for\u00eats publiques matures en France s\u2019est pench\u00e9e sur ces questions, […]<\/p>","protected":false},"featured_media":0,"template":"","categories":[50],"acf":[],"yoast_head":"\nLa pr\u00e9sence d\u2019ongul\u00e9s engendre une homog\u00e9n\u00e9isation de la v\u00e9g\u00e9tation 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\/la-presence-dongules-engendre-une-homogeneisation-de-la-vegetation-en-foret\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La pr\u00e9sence d\u2019ongul\u00e9s engendre une homog\u00e9n\u00e9isation de la v\u00e9g\u00e9tation en for\u00eat - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Exclure les ongul\u00e9s de certaines parcelles foresti\u00e8res a-t-il un impact sur la richesse sp\u00e9cifique en plantes et l\u2019\u00e9tendue du couvert v\u00e9g\u00e9tal ? 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