{"id":10291,"date":"2026-02-23T15:44:10","date_gmt":"2026-02-23T14:44:10","guid":{"rendered":"https:\/\/www.imbe.fr\/?p=10291"},"modified":"2026-02-25T14:01:24","modified_gmt":"2026-02-25T13:01:24","slug":"quand-les-paysages-et-laltitude-faconnent-lequilibre-des-oiseaux-migrateurs-et-sedentaires","status":"publish","type":"post","link":"https:\/\/www.imbe.fr\/fr\/quand-les-paysages-et-laltitude-faconnent-lequilibre-des-oiseaux-migrateurs-et-sedentaires\/","title":{"rendered":"Quand les paysages et l\u2019altitude fa\u00e7onnent l\u2019\u00e9quilibre des oiseaux migrateurs et s\u00e9dentaires"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"10291\" class=\"elementor elementor-10291\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-05690bd e-flex e-con-boxed e-con e-parent\" data-id=\"05690bd\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-1273922 e-con-full e-flex e-con e-child\" data-id=\"1273922\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b43fa53 elementor-widget-laptop__width-initial elementor-widget elementor-widget-image\" data-id=\"b43fa53\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/02\/actu-Alexandre-1024x576.jpg\" class=\"attachment-large size-large wp-image-10325\" alt=\"\" srcset=\"https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/02\/actu-Alexandre-1024x576.jpg 1024w, https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/02\/actu-Alexandre-300x169.jpg 300w, https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/02\/actu-Alexandre-768x432.jpg 768w, https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/02\/actu-Alexandre-1536x864.jpg 1536w, https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/02\/actu-Alexandre-18x10.jpg 18w, https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/02\/actu-Alexandre-1320x743.jpg 1320w, https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/02\/actu-Alexandre.jpg 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a81b32 elementor-widget elementor-widget-text-editor\" data-id=\"6a81b32\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"201\" data-end=\"517\"><strong>Pourquoi certaines montagnes accueillent-elles davantage d\u2019oiseaux migrateurs, tandis que d\u2019autres favorisent les esp\u00e8ces s\u00e9dentaires ?<\/strong><\/p><p data-start=\"201\" data-end=\"517\"><a href=\"https:\/\/www.imbe.fr\/wp-content\/uploads\/2026\/02\/52_Rault-LPO-et-al-2025-J-Biogeo-Landscape-Structure-Shapes-the-Equilibrium-Between-Migratory-and-Sedentary-Species-1.pdf\">Une nouvelle \u00e9tude<\/a>, publi\u00e9e dans<em> <span class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"><span class=\"whitespace-normal\">Journal of Biogeography,<\/span><\/span><\/em> r\u00e9v\u00e8le que <strong>la r\u00e9ponse se trouve dans l&#8217;interaction entre l&#8217;altitude, la structure du paysage et la richesse en esp\u00e8ces.<\/strong><\/p><p data-start=\"519\" data-end=\"913\">En analysant les communaut\u00e9s d\u2019oiseaux nicheurs le long d\u2019un gradient altitudinal de 4000 m\u00e8tres dans le Sud-Est de la France, <a href=\"https:\/\/www.imbe.fr\/fr\/annuaire\/charlotte-rault\/\">Charlotte Rault<\/a> (b\u00e9n\u00e9ficiant d\u2019une bourse doctorale de la r\u00e9gion Sud-PACA), <a href=\"https:\/\/www.imbe.fr\/fr\/annuaire\/yoann-pinguet\/\">Yoann Le Bagousse-Pinguet<\/a>,\u00a0<a href=\"https:\/\/www.imbe.fr\/fr\/annuaire\/agathe-leriche\/\">Agathe Leriche<\/a> et <a href=\"https:\/\/www.imbe.fr\/fr\/annuaire\/alexandre-millon\/\">Alexandre Millon<\/a> (<a href=\"https:\/\/www.imbe.fr\/fr\/recherche\/equipes-de-recherche\/popco-populations-paysages-communautes-conservation\/\">Equipe POPCO<\/a>-IMBE), en collaboration avec Amine Flitti et Catherine Godefroid de la LPO PACA, montrent que l\u2019\u00e9quilibre entre migrateurs et s\u00e9dentaires repose sur des interactions complexes entre facteurs environnementaux et \u00e9cologiques.<\/p><ul><li>La\u00a0communaut\u00e9 r\u00e9gionale est compos\u00e9e de 225 esp\u00e8ces nicheuses, dont 34% de migratrices au long cours.<\/li><li>\u00c0 basse altitude, des paysages moins diversifi\u00e9s favorisent la pr\u00e9sence d\u2019esp\u00e8ces migratrices.<\/li><li>La for\u00eat joue un r\u00f4le contrast\u00e9 : elle r\u00e9duit la proportion de migrateurs en plaine, mais l\u2019augmente en altitude.<\/li><li>Fait int\u00e9ressant, les communaut\u00e9s les plus riches en esp\u00e8ces \u2014 au-del\u00e0 d&#8217;~117 esp\u00e8ces, notamment aux basses altitudes \u2014 accueillent davantage de migrateurs qu&#8217;attendu. Le d\u00e9calage ph\u00e9nologique des esp\u00e8ces migratrices avec les esp\u00e8ces s\u00e9dentaires pourrait r\u00e9duire la comp\u00e9tition pour les ressources et permettre ainsi une richesse sp\u00e9cifique plus \u00e9lev\u00e9e.<\/li><\/ul><p>\u00a0<\/p><p data-start=\"1535\" data-end=\"1930\"><strong>Ces r\u00e9sultats mettent en lumi\u00e8re la complexit\u00e9 des m\u00e9canismes qui structurent les communaut\u00e9s d\u2019oiseaux et soulignent l\u2019importance de consid\u00e9rer conjointement altitude, paysages et biodiversit\u00e9. Ils apportent des cl\u00e9s pr\u00e9cieuses pour mieux anticiper les effets des changements environnementaux et orienter les strat\u00e9gies de conservation dans un contexte de transformation rapide des territoires.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Pourquoi certaines montagnes accueillent-elles davantage d\u2019oiseaux migrateurs, tandis que d\u2019autres favorisent les esp\u00e8ces s\u00e9dentaires ? Une nouvelle \u00e9tude, publi\u00e9e dans Journal of Biogeography, r\u00e9v\u00e8le que la r\u00e9ponse se trouve dans [&hellip;]<\/p>\n","protected":false},"author":300,"featured_media":10325,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-10291","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-publication"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/posts\/10291","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/users\/300"}],"replies":[{"embeddable":true,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/comments?post=10291"}],"version-history":[{"count":28,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/posts\/10291\/revisions"}],"predecessor-version":[{"id":10333,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/posts\/10291\/revisions\/10333"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/media\/10325"}],"wp:attachment":[{"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/media?parent=10291"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/categories?post=10291"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.imbe.fr\/fr\/wp-json\/wp\/v2\/tags?post=10291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}