{"id":46422,"date":"2026-04-13T16:20:54","date_gmt":"2026-04-13T14:20:54","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=46422"},"modified":"2026-04-13T16:20:54","modified_gmt":"2026-04-13T14:20:54","slug":"les-lichens-du-parc-national-de-la-semois-sous-la-loupe","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/les-lichens-du-parc-national-de-la-semois-sous-la-loupe\/","title":{"rendered":"Les lichens du Parc National de la Semois sous la loupe"},"content":{"rendered":"<p>En 2024 et 2025, un inventaire de la diversit\u00e9 en lichens a \u00e9t\u00e9 conduit au sein du Parc National de la Semois sur 35 affleurements rocheux de la vall\u00e9e. Sur l\u2019ensemble des sites prospect\u00e9s, fr\u00e9quemment associ\u00e9s \u00e0 des for\u00eats anciennes, un total de 465 esp\u00e8ces a \u00e9t\u00e9 recens\u00e9, dont 397 lichens, 59 champignons lich\u00e9nicoles et 9 champignons \u00e0 lich\u00e9nisation incertaine. Cette \u00e9tude a ainsi mis en \u00e9vidence le r\u00f4le crucial des affleurements et des for\u00eats anciennes de la vall\u00e9e de la Semois comme r\u00e9servoirs de biodiversit\u00e9 lich\u00e9nique \u00e0 l\u2019\u00e9chelle nationale. La richesse sp\u00e9cifique par site est variable, oscillant entre 61 \u00e0 158 esp\u00e8ces. Cet inventaire d\u2019une importance majeure a notamment conduit \u00e0 la description d&rsquo;une nouvelle esp\u00e8ce de champignon lich\u00e9nicole pour la science, <em>Talpapellis chlorinae<\/em>. De plus, 17 lichens et 8 champignons lich\u00e9nicoles ont \u00e9t\u00e9 d\u00e9crits comme nouveaux pour la Belgique. Parmi ces derniers, <em>Thelotrema suecicum<\/em>, \u00e9piphyte extr\u00eamement rare \u00e0 l&rsquo;\u00e9chelle europ\u00e9enne, souligne la valeur patrimoniale des \u00e9rabli\u00e8res de ravin comme habitats prioritaires pour la conservation. D\u2019autres esp\u00e8ces sont indicatrices de for\u00eats anciennes bien pr\u00e9serv\u00e9es, et plusieurs taxons consid\u00e9r\u00e9s comme disparus du pays ont \u00e9t\u00e9 red\u00e9couverts pendant les prospections. C\u2019est notamment le cas de plusieurs esp\u00e8ces du genre <em>Usnea<\/em>, ou de <em>Fuscopannaria mediterranea<\/em>. Enfin, parmi les diff\u00e9rentes essences inventori\u00e9es, les ch\u00eanes se sont r\u00e9v\u00e9l\u00e9s \u00eatre les arbres les plus riches en esp\u00e8ces \u00e9piphytes.<\/p>","protected":false},"excerpt":{"rendered":"<p>En 2024 et 2025, un inventaire de la diversit\u00e9 en lichens a \u00e9t\u00e9 conduit au sein du Parc National de la Semois sur 35 affleurements rocheux de la vall\u00e9e. Sur l\u2019ensemble des sites prospect\u00e9s, fr\u00e9quemment associ\u00e9s \u00e0 des for\u00eats anciennes, un total de 465 esp\u00e8ces a \u00e9t\u00e9 recens\u00e9, dont 397 lichens, 59 champignons lich\u00e9nicoles et [&hellip;]<\/p>","protected":false},"featured_media":46407,"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>Les lichens du Parc National de la Semois 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\/les-lichens-du-parc-national-de-la-semois-sous-la-loupe\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les lichens du Parc National de la Semois sous la loupe - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"En 2024 et 2025, un inventaire de la diversit\u00e9 en lichens a \u00e9t\u00e9 conduit au sein du Parc National de la Semois sur 35 affleurements rocheux de la vall\u00e9e. 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