{"id":17276,"date":"2026-09-28T10:03:03","date_gmt":"2026-09-28T08:03:03","guid":{"rendered":"https:\/\/swissdigitalcenter.ch\/?p=17276"},"modified":"2026-09-28T10:07:43","modified_gmt":"2026-09-28T08:07:43","slug":"quand-les-arbres-parlent-lintelligence-artificielle-ecoute","status":"publish","type":"post","link":"https:\/\/swissdigitalcenter.ch\/fr\/news\/quand-les-arbres-parlent-lintelligence-artificielle-ecoute\/","title":{"rendered":"Quand les arbres parlent, l&rsquo;intelligence artificielle \u00e9coute"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Les canicules qui ont touch\u00e9 l\u2019Europe et la Suisse en particulier ont p\u00e9jor\u00e9 l\u2019\u00e9tat de nos for\u00eats. Le Conseil f\u00e9d\u00e9ral d\u00e9bloque d\u2019ailleurs 17,5 millions de francs suppl\u00e9mentaires pour les prot\u00e9ger. La recherche en informatique est aussi partie prenante de la lutte contre le changement climatique, notamment gr\u00e2ce au projet financ\u00e9 par le FNS Spark. Dans ce projet, le<\/strong><a href=\"https:\/\/www.hevs.ch\/fr\/collaborateurs\/mermoud-210127\" target=\"_blank\" rel=\"noopener\"><strong>&nbsp;Prof. Dr Gr\u00e9gory Mermoud<\/strong><\/a><strong>&nbsp;et sa post-doctorante, la Dre&nbsp;<\/strong><a href=\"http:\/\/glory%20mary%20givi\/\" target=\"_blank\" rel=\"noopener\"><strong>Glory Mary Givi<\/strong><\/a><strong>&nbsp;d\u00e9veloppent de nouveaux mod\u00e8les de la physiologie des arbres et de leur mortalit\u00e9 due aux conditions climatiques changeantes. Des premiers r\u00e9sultats ont \u00e9t\u00e9 publi\u00e9s dans la revue internationale&nbsp;<\/strong><a href=\"https:\/\/www.dora.lib4ri.ch\/wsl\/dload\/wsl%253A43807\/PDF\/Mermoud-2026-Drivers_of_tree_growth_across_Europe-(published_version).pdf\" target=\"_blank\" rel=\"noopener\"><strong><em>Ecological Informatics<\/em><\/strong><\/a><strong>&nbsp;afin d\u2019\u00e9clairer la communaut\u00e9 sur l\u2019apport de l\u2019intelligence artificielle dans la gestion de nos for\u00eats, apport essentiel pour un canton alpin comme le Valais.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Les arbres d\u2019Europe sous surveillance<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ce projet exploite les donn\u00e9es de l\u2019<a href=\"https:\/\/unece.org\/environmental-policy\/air\/forests\" target=\"_blank\" rel=\"noopener\">ICP<\/a>, programme coop\u00e9ratif international sur l\u2019\u00e9valuation et la surveillance des effets de la pollution atmosph\u00e9rique sur les for\u00eats, donn\u00e9es utilis\u00e9es par les sp\u00e9cialistes des for\u00eats, notamment du <a href=\"https:\/\/www.wsl.ch\/fr\/\" target=\"_blank\" rel=\"noopener\">WSL \u02d7 institut f\u00e9d\u00e9ral de recherche sur la for\u00eat, la neige et le paysage<\/a>. Mais comment obtient-on des donn\u00e9es fiables ? En \u00e9quipant les for\u00eats europ\u00e9ennes et suisses de capteurs ou en effectuant des relev\u00e9s manuels et des analyses en laboratoire pour examiner les sols et les nutriments d\u00e9pos\u00e9s par les pluies. De plus, le diam\u00e8tre de chaque arbre int\u00e9gr\u00e9 \u00e0 l\u2019\u00e9tude est mesur\u00e9 et sa d\u00e9foliation est analys\u00e9e, donnant de pr\u00e9cieuses indications sur l\u2019\u00e9tat de sant\u00e9 des sp\u00e9cimens. Cette base de donn\u00e9es exceptionnelles qui court sur plusieurs d\u00e9cennies, permet de comprendre comment r\u00e9agissent les arbres aux maladies ou au changement climatique impliquant des ph\u00e9nom\u00e8nes m\u00e9t\u00e9orologiques extr\u00eames.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Traduire la for\u00eat en algorithme<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Les sp\u00e9cialistes des for\u00eats utilisent des mod\u00e8les dits conceptuels qui appr\u00e9hendent la mani\u00e8re dont les for\u00eats devraient cro\u00eetre. Ces mod\u00e8les sont r\u00e9alis\u00e9s \u00e0 la main et c\u2019est ici que l\u2019expertise de <a href=\"https:\/\/www.hevs.ch\/fr\/recherche-appliquee-et-developpement-a-la-hes-so-valais-wallis\/institut-informatique-valais\/\" target=\"_blank\" rel=\"noopener\">l\u2019institut informatique<\/a> de la <a href=\"https:\/\/www.hevs.ch\/fr\/\" target=\"_blank\" rel=\"noopener\">HES-SO Valais-Wallis<\/a> entre en jeu. Proposer un algorithme d\u2019apprentissage profond (<em>machine learning<\/em>) pour pr\u00e9dire la croissance des for\u00eats permet de valoriser l\u2019ensemble des donn\u00e9es extraordinaires r\u00e9colt\u00e9es par les chercheurs et chercheuses. Cet algorithme, loin d\u2019\u00eatre une bo\u00eete noire, se doit d\u2019\u00eatre explicable afin que les sp\u00e9cialistes des for\u00eats puissent commenter ses r\u00e9sultats et l\u2019am\u00e9liorer constamment. Comprendre ce fonctionnement leur donne aussi l\u2019opportunit\u00e9 de proposer de nouvelles hypoth\u00e8ses test\u00e9es par l\u2019algorithme. \u00ab Ce travail interdisciplinaire a repr\u00e9sent\u00e9 un v\u00e9ritable d\u00e9fi ! \u00bb, nous confie Gr\u00e9gory. Comprendre le travail des sp\u00e9cialistes et interpr\u00e9ter pour eux les r\u00e9sultats algorithmiques et, inversement, faire en sorte d\u2019\u00eatre compris par des biologistes ou des chimistes s\u2019est av\u00e9r\u00e9 complexe.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Une IA hybride pour des r\u00e9sultats proches du terrain<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019apprentissage profond fond\u00e9 uniquement sur les donn\u00e9es ne permet pas d\u2019obtenir des r\u00e9sultats probants ; c\u2019est pr\u00e9cis\u00e9ment ce que l\u2019article scientifique copubli\u00e9 r\u00e9cemment par le <a href=\"https:\/\/simlab-vs.ch\/\" target=\"_blank\" rel=\"noopener\">SIMLab<\/a> met en exergue. En effet, les donn\u00e9es permettent de rep\u00e9rer les corr\u00e9lations, soit les liens statistiques, mais ne peut pas \u00e9tablir seul les relations de causes \u00e0 effets. Afin de pallier ce probl\u00e8me, le laboratoire utilise un mod\u00e8le algorithmique hybride incluant les donn\u00e9es collect\u00e9es par l\u2019ICP, ainsi que des mod\u00e8les conceptuels. C\u2019est notamment gr\u00e2ce \u00e0 une collaboration \u00e9troite avec le <a href=\"https:\/\/www.wsl.ch\/fr\/personnel\/gessler\/\" target=\"_blank\" rel=\"noopener\">Prof. Dr. Arthur Gessler<\/a>, sp\u00e9cialiste de l\u2019\u00e9cologie des for\u00eats et des sols au WSL que ce projet financ\u00e9 par le <a href=\"https:\/\/www.snf.ch\/fr\/8EWqXT6CZ7wuAJUq\/encouragement\/programmes\/spark\" target=\"_blank\" rel=\"noopener\">FNS<\/a> a pu mettre en \u0153uvre le mod\u00e8le algorithmique conceptuel qui traduit la for\u00eat en algorithme.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Les arbres, comme les humains, apprennent<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cette collaboration internationale a pour but de comprendre comment maintenir les for\u00eats en bonne sant\u00e9 le plus longtemps possible. L\u2019\u00e9pig\u00e9n\u00e9tique explique la mani\u00e8re dont certains traits peuvent \u00eatre acquis d\u2019une g\u00e9n\u00e9ration \u00e0 l\u2019autre. Les humains, comme les arbres, apprennent au fil des ans. Ainsi, lorsqu\u2019un arbre subit une contrainte (chaleur, humidit\u00e9, maladie), soit il apprend et devient plus fort, soit il est durablement endommag\u00e9 et s\u2019affaiblit. Cela est tr\u00e8s difficile \u00e0 mod\u00e9liser, car ce processus se d\u00e9roule sur le temps long. Toutefois, l\u2019objectif du projet est d\u2019int\u00e9grer cette m\u00e9moire longue au mod\u00e8le algorithmique. La mod\u00e9lisation des for\u00eats donne l\u2019opportunit\u00e9 non seulement aux scientifiques de mieux comprendre le fonctionnement complexe des for\u00eats, mais aussi aux gestionnaires de for\u00eats de savoir s\u2019il est judicieux de pr\u00e9lever du bois dans une zone plut\u00f4t qu\u2019une autre, par exemple.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Quand les for\u00eats souffrent, l\u2019humain souffre aussi<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9tudier des for\u00eats de toute l\u2019Europe permet de voir clairement les effets d\u00e9l\u00e9t\u00e8res du changement climatique sur cet \u00e9cosyst\u00e8me complexe et indispensable. Les for\u00eats sont utiles pour conserver la biodiversit\u00e9 n\u00e9cessaire \u00e0 la pollinisation, mais sont \u00e9galement l\u00e0 pour absorber le CO2, filtrer et stocker de l\u2019eau douce pour les nappes phr\u00e9atiques, conserver des cycles de pluie stable, \u00e9viter les glissements de terrain, les chutes de pierres et les avalanches ou encore jouer leur r\u00f4le de climatiseur naturel pour la plan\u00e8te. Ce projet scientifique permet aussi de r\u00e9fl\u00e9chir \u00e0 des questions qui paraissent simples, mais qui rec\u00e8lent de nombreuses ramifications :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Quand et comment intervenir dans les for\u00eats, et quand les laisser \u00e9voluer librement\u00a0?<\/li>\n\n\n\n<li>Quelles esp\u00e8ces devraient \u00eatre plant\u00e9es pour des for\u00eats r\u00e9silientes\u00a0?<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">La r\u00e9silience est un objectif essentiel des recherches du SIMLab. En effet, le mod\u00e8le d\u00e9velopp\u00e9 pour analyser les for\u00eats est actuellement exp\u00e9riment\u00e9 dans le domaine de l\u2019hydrologie et de la pr\u00e9vision des nappes phr\u00e9atiques. L\u2019inter et la transdisciplinarit\u00e9 permettent \u00e0 l\u2019informatique de mod\u00e9liser des environnements complexes, de traiter de tr\u00e8s grands volumes de donn\u00e9es et de proposer des solutions appliqu\u00e9es, explicables et transf\u00e9rables qui peuvent contribuer \u00e0 am\u00e9liorer la protection des for\u00eats.<\/p>\n\n\n\n<div style=\"height:19px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Source : Article HES-SO Valais-Wallis<\/p>\n\n\n\n<div style=\"height:19px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"621\" height=\"353\" src=\"https:\/\/swissdigitalcenter.ch\/wp-content\/uploads\/2026\/09\/IA-forets.png\" alt=\"\" class=\"wp-image-17277\" srcset=\"https:\/\/swissdigitalcenter.ch\/wp-content\/uploads\/2026\/09\/IA-forets.png 621w, https:\/\/swissdigitalcenter.ch\/wp-content\/uploads\/2026\/09\/IA-forets-300x171.png 300w\" sizes=\"(max-width: 621px) 100vw, 621px\" \/><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Les canicules qui ont touch\u00e9 l\u2019Europe et la Suisse en particulier ont p\u00e9jor\u00e9 l\u2019\u00e9tat de nos for\u00eats. Le Conseil f\u00e9d\u00e9ral d\u00e9bloque d\u2019ailleurs 17,5 millions de francs suppl\u00e9mentaires pour les prot\u00e9ger. La recherche en informatique est aussi partie prenante de la lutte contre le changement climatique, notamment gr\u00e2ce au projet financ\u00e9 par le FNS Spark. Dans [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":17282,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-17276","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Quand les arbres parlent, l&#039;intelligence artificielle \u00e9coute &#8211; Swiss Digital Center<\/title>\n<meta name=\"description\" content=\"La recherche en informatique est aussi partie prenante de la lutte contre le changement climatique, notamment gr\u00e2ce au projet financ\u00e9 par le FNS Spark.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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