{"id":12997,"date":"2024-10-10T13:07:40","date_gmt":"2024-10-10T11:07:40","guid":{"rendered":"https:\/\/www.culturalusa.com\/news\/?p=12997"},"modified":"2024-10-10T13:07:40","modified_gmt":"2024-10-10T11:07:40","slug":"les-populations-de-faune-sauvage-ont-decline-de-73-en-moyenne-en-50-ans-selon-lindice-de-reference-du-wwf","status":"publish","type":"post","link":"https:\/\/www.culturalusa.com\/news\/technologie\/les-populations-de-faune-sauvage-ont-decline-de-73-en-moyenne-en-50-ans-selon-lindice-de-reference-du-wwf\/","title":{"rendered":"Les populations de faune sauvage ont d\u00e9clin\u00e9 de 73% en moyenne en 50 ans, selon l&rsquo;indice de r\u00e9f\u00e9rence du WWF"},"content":{"rendered":"<div class=\"text-color text-font block-html mb-4\">\n<h2>Les diff\u00e9rentes populations d&rsquo;animaux sauvages ont perdu en moyenne 73% de leurs individus en 50 ans, essentiellement \u00e0 cause de l&rsquo;humanit\u00e9 qui s&rsquo;en trouve menac\u00e9e, selon le rapport de r\u00e9f\u00e9rence du Fonds mondial pour la nature (WWF) publi\u00e9 \u00e0 quelques jours de la COP16 Biodiversit\u00e9 en Colombie.<\/h2>\n<blockquote><p>Cette conclusion du rapport \u00ab\u00a0<strong>Plan\u00e8te Vivante<\/strong>\u00a0\u00bb ne signifie pas que plus des deux tiers du nombre d&rsquo;animaux sauvages de la plan\u00e8te ont disparu, mais que la taille des diverses populations (groupe d&rsquo;animaux d&rsquo;une m\u00eame esp\u00e8ce partageant un habitant commun) a diminu\u00e9 de 73% en moyenne au cours des cinquante derni\u00e8res ann\u00e9es (1970-2020).<\/p><\/blockquote>\n<p>La tendance \u00e9tait de 68% dans la pr\u00e9c\u00e9dente \u00e9dition en 2022.<\/p>\n<p>Au total, environ 5.500 vert\u00e9br\u00e9s (mammif\u00e8res, oiseaux, poissons, reptiles et amphibiens), r\u00e9partis en quelque 35.000 populations \u00e0 travers le monde, sont d\u00e9sormais recens\u00e9s par cet \u00ab\u00a0Indice Plan\u00e8te vivante\u00a0\u00bb, \u00e9tabli et actualis\u00e9 tous les deux ans par la Soci\u00e9t\u00e9 zoologique de Londres (ZSL) depuis 1998.<\/p>\n<p>L&rsquo;indice est devenu une r\u00e9f\u00e9rence internationale pour prendre le pouls des \u00e9cosyst\u00e8mes naturels et analyser les cons\u00e9quences sur la sant\u00e9 humaine, l&rsquo;alimentation ou le changement climatique, malgr\u00e9 les critiques r\u00e9p\u00e9t\u00e9es de scientifiques contre la m\u00e9thode de calcul, accus\u00e9e d&rsquo;exag\u00e9rer fortement l&rsquo;ampleur du d\u00e9clin.<\/p>\n<p>\u00ab\u00a0Nous restons confiants dans la solidit\u00e9\u00a0\u00bb de l&rsquo;indice, leur a r\u00e9pondu lors d&rsquo;un point presse Andrew Terry du ZSL, mettant en avant le recours compl\u00e9mentaire \u00e0 une \u00ab\u00a0s\u00e9rie d&rsquo;indicateurs sur les risques d&rsquo;extinctions, la biodiversit\u00e9 et la sant\u00e9 des \u00e9cosyst\u00e8mes afin d&rsquo;\u00e9largir la vue d&rsquo;ensemble\u00a0\u00bb.<\/p>\n<h3>\u00a0Points de bascule<\/h3>\n<p>\u00ab\u00a0Il ne s&rsquo;agit pas seulement de la faune sauvage, il s&rsquo;agit des \u00e9cosyst\u00e8mes essentiels qui soutiennent la vie humaine\u00a0\u00bb, a averti Daudi Sumba, conservateur en chef du WWF, lors d&rsquo;une pr\u00e9sentation en ligne.<\/p>\n<p>La nouvelle \u00e9dition du rapport r\u00e9p\u00e8te la n\u00e9cessit\u00e9 d&rsquo;affronter conjointement les crises \u00ab\u00a0interconnect\u00e9es\u00a0\u00bb du climat et de la destruction de la nature. Et insiste sur la menace grandissante de \u00ab\u00a0points de bascule\u00a0\u00bb dans certains \u00e9cosyst\u00e8mes.<\/p>\n<p>\u00ab\u00a0Les changements pourraient \u00eatre irr\u00e9versibles, avec des cons\u00e9quences d\u00e9vastatrices pour l&rsquo;humanit\u00e9\u00a0\u00bb, a mis en garde M. Sumba, citant l&rsquo;exemple de l&rsquo;Amazonie, \u00e0 risque de basculer du r\u00f4le \u00ab\u00a0de puits de carbone \u00e0 \u00e9metteur de carbone, acc\u00e9l\u00e9rant ainsi le r\u00e9chauffement climatique\u00a0\u00bb.<\/p>\n<p>Autre exemple: la perte des coraux alt\u00e8rerait la r\u00e9g\u00e9n\u00e9ration d&rsquo;esp\u00e8ces de poissons victimes de surp\u00eache et, en cascade, priverait l&rsquo;humanit\u00e9 de ressources alimentaires pr\u00e9cieuses.<\/p>\n<p>Dans le d\u00e9tail, le plus fort d\u00e9clin est observ\u00e9 dans les populations d&rsquo;esp\u00e8ces d&rsquo;eau douce (-85%), suivies des vert\u00e9br\u00e9s terrestres (-69%) et marins (-56%).<\/p>\n<p>\u00ab\u00a0Nous avons vid\u00e9 les oc\u00e9ans de 40% de leur biomasse\u00a0\u00bb, a rappell\u00e9 Yann Laurans du WWF France.<\/p>\n<p>Continent par continent, le d\u00e9clin atteint 95% en Am\u00e9rique latine et dans les Cara\u00efbes, suivis par l&rsquo;Afrique (-76%), l&rsquo;Asie et le Pacifique (-60%).<\/p>\n<p>La r\u00e9duction est \u00ab\u00a0moins spectaculaire en Europe et en Asie centrale (-35%) et en Am\u00e9rique du Nord (-39%) mais seulement parce que des impacts \u00e0 grande \u00e9chelle sur la nature \u00e9taient d\u00e9j\u00e0 visibles avant 1970 dans ces r\u00e9gions: certaines populations se sont stabilis\u00e9es, voire d\u00e9velopp\u00e9es gr\u00e2ce aux efforts de conservation et \u00e0 la r\u00e9introduction d&rsquo;esp\u00e8ces\u00a0\u00bb, explique le rapport.<\/p>\n<h3>\u00a0\u00ab\u00a0Pr\u00e9occupant\u00a0\u00bb<\/h3>\n<p>Le bison d&rsquo;Europe, disparu \u00e0 l&rsquo;\u00e9tat sauvage en 1927, comptait ainsi 6.800 individus en 2020 gr\u00e2ce \u00e0 \u00ab\u00a0l&rsquo;\u00e9levage \u00e0 grande \u00e9chelle\u00a0\u00bb et \u00e0 une r\u00e9introduction r\u00e9ussie, essentiellement dans des aires prot\u00e9g\u00e9es.<\/p>\n<p>\u00ab\u00a0Le tableau d\u00e9peint est incroyablement pr\u00e9occupant\u00a0\u00bb, a d\u00e9clar\u00e9 Kirsten Schuijt, directrice g\u00e9n\u00e9rale du WWF.<\/p>\n<p>\u00ab\u00a0Mais la bonne nouvelle, c&rsquo;est que nous ne sommes pas encore au point de non-retour\u00a0\u00bb, a-t-elle ajout\u00e9, citant les efforts en cours dans le sillage de l&rsquo;accord de Paris sur le climat ou de l&rsquo;accord de Kunming-Montr\u00e9al. Ce dernier a fix\u00e9 aux Etats du monde entier une vingtaine d&rsquo;objectifs de sauvegarde de la nature \u00e0 atteindre d&rsquo;ici 2030.<\/p>\n<p>Stimuler la mise en oeuvre, jusqu&rsquo;ici timide, de cette feuille de route sera la t\u00e2che principale de la 16e conf\u00e9rence de la Convention des Nations unies sur la diversit\u00e9 biologique (CDB) qui se tient du 21 octobre au 1er novembre \u00e0 Cali, en Colombie.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Les diff\u00e9rentes populations d&rsquo;animaux sauvages ont perdu en moyenne 73% de leurs individus en 50 ans, essentiellement \u00e0 cause de l&rsquo;humanit\u00e9 qui s&rsquo;en trouve menac\u00e9e, selon le rapport de r\u00e9f\u00e9rence du Fonds mondial pour la nature (WWF) publi\u00e9 \u00e0 quelques jours de la COP16 Biodiversit\u00e9 en Colombie. Cette conclusion du rapport \u00ab\u00a0Plan\u00e8te Vivante\u00a0\u00bb ne signifie [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":12998,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[3150,3148,3149,3147,2326],"class_list":["post-12997","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologie","tag-cop16-biodiversite","tag-fonds-mondial-pour-la-nature","tag-planete-vivante","tag-populations-de-faune-sauvage","tag-wwf"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"Les diff\u00e9rentes populations d&#039;animaux sauvages ont perdu en moyenne 73% de leurs individus en 50 ans, essentiellement \u00e0 cause de l&#039;humanit\u00e9 qui s&#039;en trouve menac\u00e9e, selon le rapport de r\u00e9f\u00e9rence du Fonds mondial pour la nature (WWF) publi\u00e9 \u00e0 quelques jours de la COP16 Biodiversit\u00e9 en Colombie. 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