{"id":45534,"date":"2026-02-27T12:12:36","date_gmt":"2026-02-27T12:12:36","guid":{"rendered":"https:\/\/paneco.ch\/?p=45534"},"modified":"2026-03-23T17:14:30","modified_gmt":"2026-03-23T17:14:30","slug":"qui-sont-les-quatre-grands-des-forets-tropicales-de-sumatra","status":"publish","type":"post","link":"https:\/\/paneco.ch\/fr\/qui-sont-les-quatre-grands-des-forets-tropicales-de-sumatra\/","title":{"rendered":"Qui sont les \u00ab quatre grands \u00bb des for\u00eats tropicales de Sumatra ?"},"content":{"rendered":"\n

Lors d’un d\u00eener entre amis, on s\u2019est demand\u00e9 quelles seraient les cons\u00e9quences de la disparition des orangs-outans des for\u00eats tropicales. Il s’agissait bien s\u00fbr d’une question purement hypoth\u00e9tique car la disparition des orangs-outans sauvages et d’autres esp\u00e8ces animales est \u00e9troitement li\u00e9e \u00e0 la perte de leur habitat, la for\u00eat tropicale.<\/p>\n\n\n\n

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Quelles seraient les cons\u00e9quences si les orangs-outans dispara\u00eessaient ?<\/em><\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n

C’est uniquement dans l’\u00e9cosyst\u00e8me de Leuser, la plus grande for\u00eat tropicale humide de Sumatra, que l’orang-outan cohabite encore avec l’\u00e9l\u00e9phant de Sumatra, le rhinoc\u00e9ros et le tigre. On appelle ces mammif\u00e8res embl\u00e9matiques les \u00ab quatre grands \u00bb. Ces quatre esp\u00e8ces sont, selon la Liste rouge de l’UICN, menac\u00e9es d’extinction. Les \u00ab quatre grands \u00bb sont donc des ambassadeurs majeurs pour la protection des esp\u00e8ces et des habitats, ils jouent aussi un r\u00f4le central pour la stabilit\u00e9 de l’\u00e9cosyst\u00e8me de la for\u00eat tropicale. <\/p>\n\n\n\n

En effet les \u00ab quatre grands \u00bb remplissent des fonctions essentielles \u00e0 diff\u00e9rents niveaux de la cha\u00eene alimentaire et dans les principaux processus \u00e9cologiques. L’orang-outan de Sumatra transporte et disperse les graines sur de longues distances et de vastes espaces, il joue donc un r\u00f4le d\u00e9terminant dans la r\u00e9g\u00e9n\u00e9ration de la for\u00eat. Son absence emp\u00eacherait la dispersion de nombreuses esp\u00e8ces d’arbres \u00e0 gros fruits et r\u00e9duirait alors la diversit\u00e9 structurelle et fonctionnelle de la for\u00eat.<\/p>\n\n\n\n

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L’\u00e9l\u00e9phant de Sumatra figure sur la Liste rouge des esp\u00e8ces menac\u00e9es d’extinction.<\/em><\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n

L’\u00e9l\u00e9phant de Sumatra joue le r\u00f4le d’\u00ab ing\u00e9nieur \u00e9cologique \u00bb. Lui aussi disperse des graines, mais il cr\u00e9e aussi des clairi\u00e8res dans la for\u00eat touffue et contribue fortement \u00e0 la dynamique de la zone et \u00e0 la biodiversit\u00e9 de la for\u00eat tropicale. Le rhinoc\u00e9ros de Sumatra se nourrit dans le sous-bois. Sans son broutage le sous-bois se densifie, cela emp\u00eache quasiment les jeunes pousses de sortir de terre et la structure de la for\u00eat s’en trouve modifi\u00e9e.<\/p>\n\n\n\n

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En broutant le sous-bois, le rhinoc\u00e9ros de Sumatra joue un r\u00f4le essentiel dans l’\u00e9cosyst\u00e8me de la for\u00eat tropicale.<\/em><\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n

Le tigre de Sumatra, seul pr\u00e9dateur non herbivore, est un superpr\u00e9dateur jouant un r\u00f4le primordial dans la r\u00e9gulation des populations d’herbivores comme le cerf sambar, les muntjacs et les sangliers. Sans lui, il y aurait une surpopulation d’ongul\u00e9s qui brouteraient beaucoup trop de jeunes pousses.<\/p>\n\n\n\n

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En chassant \u00e9galement les grands ongul\u00e9s, le tigre de Sumatra emp\u00eache les cerfs ou les sangliers de brouter intens\u00e9ment les jeunes pousses.<\/em><\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n

La disparition des \u00ab quatre grands \u00bb modifierait la croissance des plantes et la structure de la for\u00eat, r\u00e9duirait les ressources disponibles pour d\u2019autres esp\u00e8ces et nuirait \u00e0 la diversit\u00e9 des plantes ainsi qu\u2019\u00e0 celle des micro-organismes. La for\u00eat tropicale s\u2019appauvrirait structurellement et deviendrait alors plus vuln\u00e9rable aux incendies, aux p\u00e9riodes de s\u00e9cheresse et aux esp\u00e8ces envahissantes. Pour assurer une protection compl\u00e8te et \u00e0 long terme des \u00e9cosyst\u00e8mes pr\u00e9cieux, nous mettons tout en \u0153uvre.<\/p>\n\n\n\n

<\/div>\n\n\n\n
\"\"<\/figure>
\n

\u00ab Que ce soit dans les for\u00eats tropicales lointaines ou dans notre propre environnement, les \u00e9cosyst\u00e8mes ont une valeur inestimable. Les \u00ab quatre grands \u00bb nous le rappellent ! \u00bb<\/p>\n\n\n\n

Brigitte Spillmann, responsable du programme en Indon\u00e9sie<\/strong><\/p>\n\n\n\n

<\/p>\n<\/div><\/div>\n\n\n\n

<\/div>\n\n\n\n
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Comment nous prot\u00e9geons l\u2019habitat des \u00abquatre grands\u00bb<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Brigitte Spillmann, notre primatologue et responsable du programme SOCP, a r\u00e9dig\u00e9 un article sur les \u00ab quatre grands \u00bb des for\u00eats tropicales de Sumatra. Elle y explique les fortes interactions \u00e9cologiques des \u00e9cosyst\u00e8mes et met en \u00e9vidence l’importance de ces quatre mammif\u00e8res pour la for\u00eat tropicale.<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[141],"tags":[],"class_list":["post-45534","post","type-post","status-publish","format-standard","hentry","category-protection-foret-tropicale"],"_links":{"self":[{"href":"https:\/\/paneco.ch\/fr\/wp-json\/wp\/v2\/posts\/45534","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/paneco.ch\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/paneco.ch\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/paneco.ch\/fr\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/paneco.ch\/fr\/wp-json\/wp\/v2\/comments?post=45534"}],"version-history":[{"count":2,"href":"https:\/\/paneco.ch\/fr\/wp-json\/wp\/v2\/posts\/45534\/revisions"}],"predecessor-version":[{"id":45536,"href":"https:\/\/paneco.ch\/fr\/wp-json\/wp\/v2\/posts\/45534\/revisions\/45536"}],"wp:attachment":[{"href":"https:\/\/paneco.ch\/fr\/wp-json\/wp\/v2\/media?parent=45534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/paneco.ch\/fr\/wp-json\/wp\/v2\/categories?post=45534"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/paneco.ch\/fr\/wp-json\/wp\/v2\/tags?post=45534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}