{"id":39678,"date":"2023-06-13T08:54:30","date_gmt":"2023-06-13T06:54:30","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&p=39678"},"modified":"2023-06-13T08:54:30","modified_gmt":"2023-06-13T06:54:30","slug":"des-essences-indigenes-pour-aider-les-insectes-forestiers","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/des-essences-indigenes-pour-aider-les-insectes-forestiers\/","title":{"rendered":"Des essences indig\u00e8nes pour aider les insectes forestiers"},"content":{"rendered":"

Une \u00e9tude bas\u00e9e sur 10 ann\u00e9es de donn\u00e9es entomologiques en Allemagne r\u00e9v\u00e8le que la plupart des 140 sites \u00e9tudi\u00e9s voient leurs populations d\u2019insectes d\u00e9cliner pour la plupart des esp\u00e8ces. Les d\u00e9clins les plus marqu\u00e9s s\u2019observent l\u00e0 o\u00f9 la proportion d\u2019essences non indig\u00e8nes est importante et dans les sites dont de grandes quantit\u00e9s de bois ont \u00e9t\u00e9 r\u00e9colt\u00e9es 10 \u00e0 15 ans avant le d\u00e9but de l\u2019\u00e9chantillonnage.<\/p>\n

Les insectes les plus affect\u00e9s par ces d\u00e9clins sont surtout les grandes esp\u00e8ces, les esp\u00e8ces les plus abondantes et les esp\u00e8ces de niveau trophique \u00e9lev\u00e9 (carnivores). En revanche, la richesse sp\u00e9cifique et l\u2019abondance en insectes herbivores ont augment\u00e9 au fil du temps. Certains de ces herbivores sont des esp\u00e8ces g\u00e9n\u00e9ralistes ou associ\u00e9es au h\u00eatre, une essence qui a \u00e9t\u00e9 favoris\u00e9e par rapport aux conif\u00e8res ces derni\u00e8res d\u00e9cennies dans la sylviculture allemande. Parmi les raisons expliquant cette augmentation, on peut \u00e9galement citer le fait que les paysages perturb\u00e9s pr\u00e9sentent a priori une diversit\u00e9 en plantes herbac\u00e9es plus grande, et que les herbivores vivent en association \u00e9troite avec leurs plantes h\u00f4tes. Une derni\u00e8re hypoth\u00e8se est que si les insectes carnivores de niveau trophique \u00e9lev\u00e9 d\u00e9clinent, les herbivores ne s\u2019en porteront que mieux.<\/p>\n

Pour enrayer ce d\u00e9clin alarmant de nos insectes forestiers, une gestion ad\u00e9quate doit donc \u00eatre envisag\u00e9e, favorisant notamment plus d\u2019essences indig\u00e8nes dans les peuplements et une exploitation en partie amoindrie l\u00e0 o\u00f9 les r\u00e9coltes de bois sont intenses.<\/p>","protected":false},"excerpt":{"rendered":"

Une \u00e9tude bas\u00e9e sur 10 ann\u00e9es de donn\u00e9es entomologiques en Allemagne r\u00e9v\u00e8le que la plupart des 140 sites \u00e9tudi\u00e9s voient leurs populations d\u2019insectes d\u00e9cliner pour la plupart des esp\u00e8ces. Les d\u00e9clins les plus marqu\u00e9s s\u2019observent l\u00e0 o\u00f9 la proportion d\u2019essences non indig\u00e8nes est importante et dans les sites dont de grandes quantit\u00e9s de bois ont […]<\/p>","protected":false},"featured_media":39665,"template":"","categories":[50],"acf":[],"yoast_head":"\nDes essences indig\u00e8nes pour aider les insectes forestiers - 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\/des-essences-indigenes-pour-aider-les-insectes-forestiers\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Des essences indig\u00e8nes pour aider les insectes forestiers - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Une \u00e9tude bas\u00e9e sur 10 ann\u00e9es de donn\u00e9es entomologiques en Allemagne r\u00e9v\u00e8le que la plupart des 140 sites \u00e9tudi\u00e9s voient leurs populations d\u2019insectes d\u00e9cliner pour la plupart des esp\u00e8ces. 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