{"id":44461,"date":"2024-10-23T16:44:43","date_gmt":"2024-10-23T14:44:43","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=article-foret-nature&#038;p=44461"},"modified":"2024-10-23T16:44:43","modified_gmt":"2024-10-23T14:44:43","slug":"les-invasions-biologiques","status":"publish","type":"article-foret-nature","link":"https:\/\/foretnature.be\/en\/article-foret-nature\/les-invasions-biologiques\/","title":{"rendered":"Les invasions biologiques"},"content":{"rendered":"<p>Depuis des si\u00e8cles, l\u2019homme a favoris\u00e9 le d\u00e9placement des esp\u00e8ces bien au-del\u00e0 de leurs capacit\u00e9s de dispersion naturelle. Les plantes de culture, principalement les c\u00e9r\u00e9ales, ont \u00e9t\u00e9 introduites en Asie du Sud-Ouest et en Europe du Sud, au N\u00e9olithique, il y a 6 000 ans. Toutefois, ce n\u2019est qu\u2019\u00e0 partir du XVIe si\u00e8cle, et plus r\u00e9cemment encore avec l\u2019augmentation des transports \u00e0 longue distance, que d\u2019importantes modifications sont survenues dans la distribution des esp\u00e8ces. L\u2019essor des colonies europ\u00e9ennes, de m\u00eame que le d\u00e9veloppement des jardins botaniques, de l\u2019horticulture, de l\u2019\u00e9levage et de la sylviculture ont \u00e9galement largement contribu\u00e9 \u00e0 ces mouvements d\u2019esp\u00e8ces. Cette extension consid\u00e9rable des aires de distribution est \u00e0 l\u2019origine de la probl\u00e9matique \u00e9cologique majeure que constituent les invasions biologiques. Les cons\u00e9quences des invasions biologiquesHuit pour cent des v\u00e9g\u00e9taux et 41 % des animaux naturalis\u00e9s en Wallonie sont repris sur la liste noire \u00e9tablie par le forum belge sur les esp\u00e8ces invasives et ont donc un impact n\u00e9gatif av\u00e9r\u00e9 sur l\u2019environnement en Wallonie et dans les r\u00e9gions limitrophes. Sur base de donn\u00e9es obtenues aux \u00c9tats-Unis, en Grande-Bretagne, en Australie, en Inde, en Afrique du Sud et au Br\u00e9sil, les co\u00fbts \u00e9conomiques engendr\u00e9s par les invasions biologiques repr\u00e9senteraient environ 5 % de l\u2019\u00e9conomie mondiale. Une situation alarmante ? Jusqu\u2019\u00e0 pr\u00e9sent, la probl\u00e9matique des invasions biologiques en Wallonie reste relativement confin\u00e9e. Toutefois, diff\u00e9rents indicateurs montrent que la situation progresse sur le terrain, que de nouvelles esp\u00e8ces invasives apparaissent constamment et qu\u2019un nombre croissant de milieux semi-naturels sont aujourd\u2019hui touch\u00e9s. Si rien n\u2019est fait, il est \u00e9vident que le montant de la facture va s\u2019accro\u00eetre de mani\u00e8re tr\u00e8s significative dans les ann\u00e9es qui viennent.<\/p>","protected":false},"excerpt":{"rendered":"<p>Depuis des si\u00e8cles, l\u2019homme a favoris\u00e9 le d\u00e9placement des esp\u00e8ces bien au-del\u00e0 de leurs capacit\u00e9s de dispersion naturelle. Les plantes de culture, principalement les c\u00e9r\u00e9ales, ont \u00e9t\u00e9 introduites en Asie du Sud-Ouest et en Europe du Sud, au N\u00e9olithique, il y a 6 000 ans. Toutefois, ce n\u2019est qu\u2019\u00e0 partir du XVIe si\u00e8cle, et plus [&hellip;]<\/p>","protected":false},"featured_media":0,"template":"","categories":[49],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les invasions biologiques - 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\/les-invasions-biologiques\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les invasions biologiques - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Depuis des si\u00e8cles, l\u2019homme a favoris\u00e9 le d\u00e9placement des esp\u00e8ces bien au-del\u00e0 de leurs capacit\u00e9s de dispersion naturelle. 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