Le 8 octobre 2026, le nouveau rapport \u00ab Living Planet Index \u00bb (LPI) a \u00e9t\u00e9 publi\u00e9. Il pr\u00e9sente une baisse moyenne de 73 % des populations de faune sauvage \u00e9tudi\u00e9es entre 1970 et 2022, sur un total de 35 803 populations suivies. Ce chiffre constitue l\u2019indicateur principal communiqu\u00e9 par les auteurs du LPI.<\/p>\n
Le rapport insiste sur le fait que cette diminution moyenne de 73 % ne signifie pas que 73 % des esp\u00e8ces ont disparu, que 73 % des individus ou des populations ont \u00e9t\u00e9 perdus, ni que 73 % des esp\u00e8ces ou des populations sont en d\u00e9clin, et ne permet pas de quantifier le nombre d\u2019extinctions. Les auteurs soulignent que de nombreuses reprises m\u00e9diatiques interpr\u00e8tent \u00e0 tort ce chiffre comme une \u00ab perte de 73 % de la faune \u00bb ou \u00ab 73 % d\u2019esp\u00e8ces \u00e9teintes \u00bb, ce qui est explicitement indiqu\u00e9 comme incorrect.<\/p>\n
Le LPI mesure les variations dans le temps de populations de faune sauvage \u00e0 partir de donn\u00e9es disponibles, rarement continues depuis 1970. Pour chaque population, un taux de changement (positif, n\u00e9gatif ou nul) est calcul\u00e9. L\u2019indicateur global est obtenu en prenant la moyenne g\u00e9om\u00e9trique de ces taux de changement, en appliquant des pond\u00e9rations diff\u00e9renci\u00e9es entre populations, ce qui influence le r\u00e9sultat final. Environ la moiti\u00e9 des populations \u00e9tudi\u00e9es sont en d\u00e9clin et l\u2019autre moiti\u00e9 est stable ou en augmentation, ce qui nuance la lecture du chiffre global.<\/p>\n
Compar\u00e9 aux \u00e9ditions pr\u00e9c\u00e9dentes, le LPI 2022 faisait \u00e9tat d\u2019un d\u00e9clin moyen de 69 % depuis 1970, et celui de 2024 d\u2019un d\u00e9clin de 73 %. Le rapport 2026 confirme ce niveau de 73 %. La variation entre 2022 et 2024 ne correspond donc pas \u00e0 une nouvelle baisse uniforme des populations dans cet intervalle, mais refl\u00e8te surtout des \u00e9volutions m\u00e9thodologiques et de p\u00e9rim\u00e8tre de donn\u00e9es, point qui est souligne implicitement par l\u2019auteure sans \u00eatre d\u00e9taill\u00e9 dans l\u2019extrait.<\/p>\n
Les acteurs cl\u00e9s mentionn\u00e9s sont les auteurs et chercheurs responsables du LPI, sans pr\u00e9cision institutionnelle dans l\u2019extrait, ainsi que l\u2019auteure de l\u2019article, qui propose une clarification m\u00e9thodologique. Aucun pays ni autorit\u00e9 publique sp\u00e9cifique n\u2019est cit\u00e9. L\u2019enjeu principal pour le suivi des politiques publiques r\u00e9side dans l\u2019interpr\u00e9tation correcte de l\u2019indicateur : il s\u2019agit d\u2019un indicateur de tendance moyenne des populations suivies et non d\u2019un bilan d\u2019extinctions ou d\u2019une mesure directe de la perte totale de biodiversit\u00e9. Les limites de l\u2019indicateur, notamment l\u2019h\u00e9t\u00e9rog\u00e9n\u00e9it\u00e9 des donn\u00e9es disponibles dans le temps et l\u2019impact des choix de pond\u00e9ration, sont mises en avant comme \u00e9l\u00e9ments \u00e0 prendre en compte dans l\u2019analyse et le pilotage des politiques environnementales et, indirectement, des politiques sectorielles susceptibles d\u2019avoir un impact sur les \u00e9cosyst\u00e8mes (agriculture, am\u00e9nagement, emploi, activit\u00e9s \u00e9conomiques).(contenu r\u00e9sum\u00e9 en fran\u00e7ais par l’IA)\u00a0Lire la Suite<\/a><\/p>","protected":false},"excerpt":{"rendered":" Le 8 octobre 2026, le nouveau rapport \u00ab Living Planet Index \u00bb (LPI) a \u00e9t\u00e9 publi\u00e9. Il pr\u00e9sente une baisse moyenne de 73 % des populations de faune sauvage \u00e9tudi\u00e9es […]<\/p>\n","protected":false},"author":1,"featured_media":10543,"comment_status":"","ping_status":"","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":"default","ast-page-background-enabled":"default","ast-page-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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[26],"tags":[233,227,226],"class_list":["post-20219","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-donnees-etudes-evaluation-et-prospective","tag-ourworldindata","tag-ia","tag-sources-etrangeres"],"_links":{"self":[{"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/posts\/20219","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=20219"}],"version-history":[{"count":0,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/posts\/20219\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=\/wp\/v2\/media\/10543"}],"wp:attachment":[{"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=20219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=20219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/veilles-affaires-sociales.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=20219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}