{"id":41067,"date":"2024-06-13T11:33:13","date_gmt":"2024-06-13T09:33:13","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=41067"},"modified":"2024-06-13T11:33:13","modified_gmt":"2024-06-13T09:33:13","slug":"la-biodiversite-des-forets-francaises-sous-la-loupe","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/la-biodiversite-des-forets-francaises-sous-la-loupe\/","title":{"rendered":"La biodiversit\u00e9 des for\u00eats fran\u00e7aises sous la loupe"},"content":{"rendered":"<p>L\u2019Observatoire national de la biodiversit\u00e9 a publi\u00e9 en mars dernier un rapport concis et illustr\u00e9 pr\u00e9sentant les chiffres-cl\u00e9s relatifs \u00e0 la biodiversit\u00e9 des for\u00eats fran\u00e7aises. Le rapport met notamment l\u2019accent sur le sol forestier, v\u00e9ritable \u00ab capital sant\u00e9 \u00bb de l\u2019\u00e9cosyst\u00e8me selon l\u2019ONF. L\u2019article souligne que la richesse bact\u00e9rienne des sols forestiers hexagonaux est \u00e9valu\u00e9e en moyenne \u00e0 1146 taxons diff\u00e9rents par gramme de sol sur la p\u00e9riode 2000-2009, et qu\u2019ils abritent en moyenne 6 grands types de vers de terre. La quasi-totalit\u00e9 des for\u00eats de l\u2019Hexagone est fortement influenc\u00e9e par les soci\u00e9t\u00e9s humaines, mais 40 % d\u2019entre elles sont tout de m\u00eame consid\u00e9r\u00e9es comme anciennes. Le rythme de coupe des arbres est actuellement inf\u00e9rieur \u00e0 celui de leur croissance : sur la p\u00e9riode 2011-2019, les pr\u00e9l\u00e8vements de bois repr\u00e9sentent 64 % de l&rsquo;accroissement, avec de fortes disparit\u00e9s entre massifs.<\/p>\n<p>La gestion foresti\u00e8re est aujourd\u2019hui globalement bien planifi\u00e9e mais reste un facteur de changement important des \u00e9cosyst\u00e8mes, influen\u00e7ant leur \u00e9tat et leur dynamique.<\/p>\n<p>Les changements climatiques affectent d\u00e9j\u00e0 les for\u00eats, modifiant l\u2019aire de r\u00e9partition de certaines esp\u00e8ces ou causant une mortalit\u00e9 croissante de certaines essences. Par exemple, les dix derni\u00e8res ann\u00e9es, la chenille processionnaire du pin remonte en moyenne de 4 km par an vers le Nord de la France, et l\u2019augmentation de la mortalit\u00e9 des arbres est estim\u00e9e \u00e0 54 % par l\u2019IGN.<\/p>\n<p>Les effectifs d\u2019oiseaux forestiers sont presque stables depuis les ann\u00e9es 1990, mais seuls 18 % des habitats forestiers d\u2019int\u00e9r\u00eat communautaire \u00e9valu\u00e9s entre 2013 et 2018 sont dans un \u00e9tat de conservation favorable.<\/p>\n<p>Les enjeux li\u00e9s \u00e0 la pr\u00e9servation de la biodiversit\u00e9 font l\u2019objet de plusieurs politiques publiques \u00e0 l\u2019\u00e9chelle nationale, dont les aires prot\u00e9g\u00e9es ou la Trame Verte et Bleue, en plus d\u2019autres programmes comme ceux portant sur la conservation des ressources g\u00e9n\u00e9tiques des essences autochtones ou les trames de vieux bois. Ces derni\u00e8res concernaient 12 % de la surface des for\u00eats fran\u00e7aises m\u00e9tropolitaines en 2022, et les volumes de bois morts et de tr\u00e8s gros arbres ont augment\u00e9 de 7 % en moyenne entre 2008 et 2017. Le rapport pointe aussi une augmentation de 19 % de l\u2019abondance de 50 essences indig\u00e8nes communes entre 2007 et 2017.<\/p>","protected":false},"excerpt":{"rendered":"<p>L\u2019Observatoire national de la biodiversit\u00e9 a publi\u00e9 en mars dernier un rapport concis et illustr\u00e9 pr\u00e9sentant les chiffres-cl\u00e9s relatifs \u00e0 la biodiversit\u00e9 des for\u00eats fran\u00e7aises. Le rapport met notamment l\u2019accent sur le sol forestier, v\u00e9ritable \u00ab capital sant\u00e9 \u00bb de l\u2019\u00e9cosyst\u00e8me selon l\u2019ONF. L\u2019article souligne que la richesse bact\u00e9rienne des sols forestiers hexagonaux est \u00e9valu\u00e9e [&hellip;]<\/p>","protected":false},"featured_media":41068,"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>La biodiversit\u00e9 des for\u00eats fran\u00e7aises sous la loupe - 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-biodiversite-des-forets-francaises-sous-la-loupe\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La biodiversit\u00e9 des for\u00eats fran\u00e7aises sous la loupe - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"L\u2019Observatoire national de la biodiversit\u00e9 a publi\u00e9 en mars dernier un rapport concis et illustr\u00e9 pr\u00e9sentant les chiffres-cl\u00e9s relatifs \u00e0 la biodiversit\u00e9 des for\u00eats fran\u00e7aises. 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