{"id":89881,"date":"2024-10-21T06:54:43","date_gmt":"2024-10-20T23:54:43","guid":{"rendered":"https:\/\/www.forestsnews.org\/?p=89881"},"modified":"2024-10-21T06:54:43","modified_gmt":"2024-10-20T23:54:43","slug":"lexploitation-miniere-cause-plus-de-deforestation-que-prevu-dans-les-forets-tropicales-du-congo","status":"publish","type":"post","link":"https:\/\/www.forestsnews.org\/fr\/89881\/lexploitation-miniere-cause-plus-de-deforestation-que-prevu-dans-les-forets-tropicales-du-congo","title":{"rendered":"L\u2019exploitation mini\u00e8re cause plus de d\u00e9forestation que pr\u00e9vu dans les for\u00eats tropicales du Congo"},"content":{"rendered":"<p>Une <a href=\"https:\/\/www.nature.com\/articles\/s41893-024-01421-8\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">nouvelle \u00e9tude<\/a> publi\u00e9e dans la revue <em>Nature Sustainability<\/em> pointe l&rsquo;impact consid\u00e9rable de l\u2019exploitation mini\u00e8re, bien au-del\u00e0 des sites d\u2019extraction.<\/p>\n<p>Dirig\u00e9s par une \u00e9quipe travaillant sur <a href=\"https:\/\/www.cifor-icraf.org\/gcs\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\"> l\u2019\u00c9tude comparative mondiale sur la REDD+ du Centre de recherche foresti\u00e8re internationale et du Centre International de Recherche en Agroforesterie (CIFOR-ICRAF)<\/a>, ces travaux sont les premiers \u00e0 estimer les effets d\u00e9clencheurs produits par l\u2019exploitation mini\u00e8re dans la r\u00e9gion. L\u2019\u00e9tude r\u00e9v\u00e8le que l\u2019exploitation artisanale attire des communaut\u00e9s enti\u00e8res. Des zones de peuplement et des surfaces agricoles surgissent tout autour des sites d\u2019extraction et entra\u00eenent un d\u00e9boisement en moyenne 28 fois sup\u00e9rieur \u00e0 celui de l\u2019exploitation mini\u00e8re elle-m\u00eame.<\/p>\n<p>La seconde plus vaste for\u00eat du monde, situ\u00e9e dans le bassin du Congo, joue un r\u00f4le vital en tant que puits de carbone, r\u00e9serve de haute diversit\u00e9 biologique et source de moyens de subsistance pour des millions de personnes. Malgr\u00e9 cela, des minerais pr\u00e9cieux se cachent sous sa canop\u00e9e, en particulier l\u2019or et le coltan, un composant essentiel pour les smartphones et les ordinateurs portables.<\/p>\n<p>R\u00e9cemment, une \u00e9quipe compos\u00e9e de scientifiques de l\u2019universit\u00e9 Norv\u00e9gienne des Sciences de la Vie (NMBU), de l\u2019universit\u00e9 et du centre de recherche de Wageningen, du CIFOR-ICRAF et du centre de Coop\u00e9ration Internationale en Recherche Agronomique pour le D\u00e9veloppement (CIRAD) s\u2019est servie de donn\u00e9es satellitaires avanc\u00e9es et de mod\u00e8les statistiques pour examiner l\u2019impact des exploitations mini\u00e8res sur les for\u00eats environnantes.<\/p>\n<div class='short-link'>\n\t\t\t<a class='GTMshortLink' href='https:\/\/www.forestsnews.org\/10221\/deforestation-from-mining-in-the-congo-more-than-a-hole-in-the-canopy?fnl=en' target='_blank'>\n\t\t\t\t<span class='short-link__box'><span>A LIRE EGALEMENT<\/span><\/span>\n\t\t\t\t<span class='short-link__desc'>Deforestation from mining in the Congo more than &#039; a hole in the canopy&#039;<\/span>\n\t\t\t<\/a>\n\t\t<\/div>\n<p>\u00ab \u00c0 l\u2019est de la R\u00e9publique d\u00e9mocratique du Congo, la vaste majorit\u00e9 des minerais sont extraits dans des mines artisanales \u00bb, indique Malte Ladewig, auteur principal et doctorant \u00e0 School of Economics and Business (NMBU). \u00ab De petite taille, ces sites n\u2019ont qu\u2019un impact direct limit\u00e9 sur la d\u00e9forestation. \u00bb<\/p>\n<p>\u00ab Ce qui est bien plus pr\u00e9occupant, ce sont les impacts indirects provoqu\u00e9s par l\u2019utilisation des terres qui accompagne l&rsquo;apparition d\u2019une mine \u00bb, explique-t-il. \u00ab Lorsque des minerais sont d\u00e9couverts, les gens commencent \u00e0 s\u2019installer dans ces zones souvent \u00e9loign\u00e9es et peu peupl\u00e9es. \u00bb<\/p>\n<p>Ces premi\u00e8res implantations n\u00e9cessitent alors des terres pour construire des maisons et cultiver de la nourriture. L\u2019\u00e9tude montre que la d\u00e9forestation issue de l\u2019expansion de l\u2019installation et des cultures s&rsquo;acc\u00e9l\u00e8re lors de l\u2019ouverture de la mine et d\u00e9passe rapidement la surface d\u00e9bois\u00e9e pour l\u2019extraction.<\/p>\n<p>Une analyse de sensibilit\u00e9 indique que les effets d\u00e9clencheurs varient selon le lieu. Les mines situ\u00e9es dans des zones agricoles plus favorables et disposant d\u2019un meilleur acc\u00e8s pr\u00e9sentaient une pouss\u00e9e de d\u00e9forestation plus forte apr\u00e8s la d\u00e9couverte des minerais. Par ailleurs, l\u2019\u00e9tude \u00e9tablit une corr\u00e9lation positive entre le nombre de conflits ayant \u00e9clat\u00e9 depuis l\u2019ouverture de la mine et l\u2019\u00e9tendue de la d\u00e9forestation qui a suivi. Estimer les effets d\u00e9clencheurs de l\u2019exploitation mini\u00e8re est loin d\u2019\u00eatre facile. \u00ab La principale difficult\u00e9 consiste \u00e0 rep\u00e9rer des sites de contr\u00f4le satisfaisants \u00bb, commente Arild Angelsen, co-auteur, professeur \u00e0 NMBU et scientifique rattach\u00e9 au CIFOR-ICRAF. Les travaux s&rsquo;appuient sur des m\u00e9thodes statistiques r\u00e9cemment d\u00e9velopp\u00e9es, qui utilisent des mines non encore \u00e9tablies comme sites de contr\u00f4le, jusqu\u2019\u00e0 ce qu\u2019elles deviennent des sites d\u2019extraction actifs.<\/p>\n<p>L\u2019\u00e9tude puise dans des donn\u00e9es uniques, tire partie des algorithmes du machine learning et de donn\u00e9es provenant de plusieurs sources, notamment de Global Forest Watch, de Planet-NICFI et de la FAO, pour suivre l&rsquo;activit\u00e9 mini\u00e8re et les changements d\u2019utilisation des terres qui s\u2019ensuivent. Les donn\u00e9es sur l\u2019exploitation mini\u00e8re sont tir\u00e9es des travaux de Robert Masolele de l\u2019universit\u00e9 et du centre de recherche de Wageningen, r\u00e9cemment publi\u00e9s dans <a href=\"https:\/\/www.nature.com\/articles\/s41598-024-52138-9\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Scientific Reports<\/a>.<\/p>\n<p>Si la pr\u00e9servation des for\u00eats tropicales est capitale, les solutions pour y arriver sont plus complexes, souligne M. Ladewig. \u00ab Des d\u00e9cennies de conflits arm\u00e9s ont abouti \u00e0 une d\u00e9gradation des conditions de vie des populations rurales, cr\u00e9ant une d\u00e9pendance g\u00e9n\u00e9ralis\u00e9e \u00e0 l\u2019\u00e9gard de l\u2019extraction artisanale dans la r\u00e9gion. Toute solution envisag\u00e9e doit obligatoirement avoir pour condition pr\u00e9alable une paix durable et se concentrer sur des moyens de subsistance alternatifs. \u00bb<\/p>\n<p>Certaines initiatives pass\u00e9es ciblant la cha\u00eene d&rsquo;approvisionnement, m\u00eame si elles \u00e9taient bien intentionn\u00e9es, se sont r\u00e9v\u00e9l\u00e9es insuffisantes. Les recherches en cours men\u00e9es par les auteurs ciblent \u00e0 pr\u00e9sent les implications de l\u2019extraction artisanale sur les moyens de subsistance des communaut\u00e9s locales de la r\u00e9gion.<\/p>\n<hr \/>\n<p><em>L\u2019\u00e9tude a \u00e9t\u00e9 publi\u00e9e le 2 septembre 2024 dans la revue Nature Sustainability et peut \u00eatre consult\u00e9e \u00e0 l\u2019adresse suivante :<\/em> <a href=\"https:\/\/www.nature.com\/articles\/s41893-024-01421-8\" target=\"_blank\" rel=\"noopener noreferrer nofollow\"><em>https:\/\/www.nature.com\/articles\/s41893-024-01421-8<\/em><\/a>. Pour plus de renseignements, veuillez contacter l&rsquo;auteur : <em>Malte Ladewig (<\/em><a href=\"mailto:malte.ladewig@nmbu.no\"><em>malte.ladewig@nmbu.no<\/em><\/a><em>).<\/em><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une nouvelle \u00e9tude publi\u00e9e dans la revue Nature Sustainability pointe l&rsquo;impact consid\u00e9rable de l\u2019exploitation mini\u00e8re, bien au-del\u00e0 des sites d\u2019extraction. Dirig\u00e9s par une \u00e9quipe travaillant sur l\u2019\u00c9tude comparative mondiale sur la REDD+ du Centre de recherche foresti\u00e8re internationale et du Centre International de Recherche en Agroforesterie (CIFOR-ICRAF), ces travaux sont les premiers \u00e0 estimer les [&hellip;]<\/p>\n","protected":false},"author":38,"featured_media":89882,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[6090],"tags":[11441],"language":[2170],"location":[12246],"tag-bahasa":[],"tag-espanol":[],"tag-francais":[11442],"type-espanol":[],"type-bahasa":[],"type-english":[],"type-francais":[],"coauthors":[228,11418,11745],"class_list":["post-89881","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-forests-news","tag-exploitation-miniere","language-francais","location-africa","tag-francais-exploitation-miniere-artisanale"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.4 (Yoast SEO v28.4) - 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