{"id":44228,"date":"2024-10-23T16:41:30","date_gmt":"2024-10-23T14:41:30","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=article-foret-nature&p=44228"},"modified":"2024-10-23T16:41:30","modified_gmt":"2024-10-23T14:41:30","slug":"diversite-et-determination-des-saules-en-wallonie","status":"publish","type":"article-foret-nature","link":"https:\/\/foretnature.be\/en\/article-foret-nature\/diversite-et-determination-des-saules-en-wallonie\/","title":{"rendered":"Diversit\u00e9 et d\u00e9termination des saules en Wallonie"},"content":{"rendered":"

Il existerait entre 330 et 500 esp\u00e8ces de saules \u00e0 travers le monde. En Wallonie, deux groupes d’esp\u00e8ces europ\u00e9ennes sont bien repr\u00e9sent\u00e9es : le sous-genre Salix et le sous-genre Vetrix. La diversit\u00e9 biologique des esp\u00e8ces de saule s’amplifie si l’on tient compte des hybrides. En effet, les possibilit\u00e9s d’hybridation sont nombreuses. Entre 2005 et 2007, des pr\u00e9l\u00e8vements de rameaux de saules ont \u00e9t\u00e9 r\u00e9alis\u00e9s le long des cours d’eau de la Vire et du Ton jusqu’\u00e0 l’Escaut. Ils ont \u00e9t\u00e9 boutur\u00e9s en vue d’en faire un parc \u00e0 clones dans le cadre du projet europ\u00e9en ECOLIRI. Les rameaux ont ensuite \u00e9t\u00e9 \u00e9valu\u00e9s de mani\u00e8re syst\u00e9matique depuis 2009. Le but de la d\u00e9marche \u00e9tait de pouvoir \u00e9valuer la vraie diversit\u00e9 des saules en Wallonie et d’en d\u00e9duire des mesures de conservation et de multiplication pour les besoins r\u00e9gionaux. En 2011, un peu moins de 92 % de cette collection de 494 arbres \u00e9taient aptes \u00e0 la multiplication dont 72 % ont pu faire l’objet de pr\u00e9l\u00e8vements de rameaux pour la d\u00e9termination. Pour chacune des sept esp\u00e8ces de saules qui ont plus de six individus class\u00e9s avec certitude, une fiche photographique comment\u00e9e a \u00e9t\u00e9 constitu\u00e9e pour faciliter les futures d\u00e9terminations. La plupart de esp\u00e8ces indig\u00e8nes de saule de la flore de Wallonie ont \u00e9t\u00e9 d\u00e9termin\u00e9es dans la collection ECOLIRI pr\u00e9lev\u00e9e le long de cours d’eau non tourbeux et non mar\u00e9cageux. Le sex-ratio est fortement d\u00e9s\u00e9quilibr\u00e9 en faveur des arbres femelles, ce qui peut r\u00e9duire la r\u00e9g\u00e9n\u00e9ration et emp\u00eacher la colonisation de nouveaux habitats propices \u00e0 leur maintien. [B.C.]<\/p>","protected":false},"excerpt":{"rendered":"

Il existerait entre 330 et 500 esp\u00e8ces de saules \u00e0 travers le monde. En Wallonie, deux groupes d’esp\u00e8ces europ\u00e9ennes sont bien repr\u00e9sent\u00e9es : le sous-genre Salix et le sous-genre Vetrix. La diversit\u00e9 biologique des esp\u00e8ces de saule s’amplifie si l’on tient compte des hybrides. En effet, les possibilit\u00e9s d’hybridation sont nombreuses. Entre 2005 et 2007, […]<\/p>","protected":false},"featured_media":0,"template":"","categories":[49],"acf":[],"yoast_head":"\nDiversit\u00e9 et d\u00e9termination des saules en Wallonie - 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\/article-foret-nature\/diversite-et-determination-des-saules-en-wallonie\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Diversit\u00e9 et d\u00e9termination des saules en Wallonie - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Il existerait entre 330 et 500 esp\u00e8ces de saules \u00e0 travers le monde. En Wallonie, deux groupes d’esp\u00e8ces europ\u00e9ennes sont bien repr\u00e9sent\u00e9es : le sous-genre Salix et le sous-genre Vetrix. La diversit\u00e9 biologique des esp\u00e8ces de saule s’amplifie si l’on tient compte des hybrides. En effet, les possibilit\u00e9s d’hybridation sont nombreuses. 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