{"id":15817,"date":"2023-07-25T16:42:27","date_gmt":"2023-07-25T16:42:27","guid":{"rendered":"https:\/\/www.africa-press.net\/djibouti\/politique\/une-foret-fossile-au-japon-livre-ses-secrets"},"modified":"2023-07-25T17:09:53","modified_gmt":"2023-07-25T17:09:53","slug":"une-foret-fossile-au-japon-livre-ses-secrets","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/une-foret-fossile-au-japon-livre-ses-secrets","title":{"rendered":"Une for\u00eat fossile au Japon livre ses secrets"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Djibouti. <\/strong><\/span>En 1994, lors d&rsquo;une pe\u0301riode de se\u0301cheresse se\u0301ve\u0300re, une fore\u0302t fossilise\u0301e est apparue dans le lit de la rivie\u0300re Kiso, au Japon. Plus de 400 souches d&rsquo;arbres se sont retrouve\u0301es a\u0300 l&rsquo;air, dresse\u0301es sur un tapis de feuilles fossilise\u0301es. Depuis, la rivie\u0300re a repris ses droits et la majorite\u0301 de ces restes sont de nouveaux submerge\u0301s. Mais les pale\u0301ontologues ont pu analyser 137 souches et plusieurs dizaines de feuilles. Leurs re\u0301sultats sont de\u0301sormais disponibles, publie\u0301s dans la revue Scientific Reports.<\/p>\n<p><b>Une fore\u0302t monodominante<\/b><\/p>\n<p>La presque totalite\u0301 (95%) des souches examine\u0301es correspondait a\u0300 une seule espe\u0300ce : Wataria parvipora. Il s&rsquo;agit d&rsquo;un bois fossile aise\u0301ment identifiable par ses anneaux de croissance distinctifs, ses rayons de parenchyme abondants et son absence de canaux de re\u0301sine. Pre\u0301sents en Asie et en Europe, a\u0300 la fin du Mioce\u0300ne et au Plioce\u0300ne, des fossiles de ces arbres et ont de\u0301ja\u0300 e\u0301te\u0301 e\u0301tudie\u0301s. Ici, ils sont a\u0302ge\u0301s de 10 a\u0300 5 millions d&rsquo;anne\u0301es et ils formaient une fore\u0302t monodominante qui s&rsquo;e\u0301tendait sur 2000 me\u0300tres carre\u0301s.<\/p>\n<p>L&rsquo;e\u0301quipe a e\u0301galement constate\u0301 que les souches e\u0301taient exclusivement recouvertes d&rsquo;un type spe\u0301cifique de feuilles portant le nom Byttneriophyllum tiliifolium et dont des restes sont retrouve\u0301s dans toute l&rsquo;Eurasie a\u0300 la me\u0302me pe\u0301riode que W. parvipora. Ces feuilles sont conside\u0301re\u0301es comme faisant partie de la famille des malvace\u0301es qui compte dans ses rangs le cacaoyer, le coton ou encore le gombo.<\/p>\n<p>Anneaux de croissance caracte\u0301ristiques de Wataria parvipora. Cre\u0301dits : Nishino et al., Scientific Reports.<\/p>\n<p><b>Un lien e\u0301tabli<\/b><\/p>\n<p>S&rsquo;il parai\u0302t simple d&rsquo;e\u0301tablir aujourd&rsquo;hui a\u0300 quel arbre appartiennent les feuilles mortes, ce lien est bien plus difficile a\u0300 e\u0301tablir pour des espe\u0300ces ve\u0301ge\u0301tales disparues dont la plupart ne sont connues que par quelques fragments. Mais 98% des feuilles retrouve\u0301es sur la zone sont de la me\u0302me espe\u0300ce et les chercheurs ont de\u0301montre\u0301 qu&rsquo;elles ont e\u0301te\u0301 trouve\u0301es la\u0300 ou\u0300 elles sont tombe\u0301es et qu&rsquo;elles n&rsquo;ont pas e\u0301te\u0301 apporte\u0301es par un quelconque processus. Ils peuvent ainsi affirmer que les Byttneriophyllum tiliifolium sont les feuilles de Wataria parvipora.<\/p>\n<p>D&rsquo;autres e\u0301tudes ont lie\u0301 les feuilles de B. tiliifolium a\u0300 un fruit : Banisteriaecarpum giganteum. Cependant, les pale\u0301ontologues n&rsquo;ont pour le moment trouve\u0301 aucune trace de ce dernier dans la fore\u0302t japonaise. Une e\u0301ventuelle nouvelle de\u0301couverte n&rsquo;est pas a\u0300 exclure. Elle permettrait alors d&rsquo;affirmer que ces trois structures, avec des noms de genre et d&rsquo;espe\u0300ces diffe\u0301rents, appartiennent en re\u0301alite\u0301 a\u0300 un seul et me\u0302me ve\u0301ge\u0301tal.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/djibouti\">Djibouti<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Djibouti. En 1994, lors d&rsquo;une pe\u0301riode de se\u0301cheresse se\u0301ve\u0300re, une fore\u0302t fossilise\u0301e est apparue dans le lit de la rivie\u0300re Kiso, au Japon. Plus de 400 souches d&rsquo;arbres se sont retrouve\u0301es a\u0300 l&rsquo;air, dresse\u0301es sur un tapis de feuilles fossilise\u0301es. Depuis, la rivie\u0300re a repris ses droits et la majorite\u0301 de ces restes [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":15816,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,49,50],"class_list":["post-15817","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-djibouti","tag-djibouti"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Une for\u00eat fossile au Japon livre ses secrets - Djibouti<\/title>\n<meta name=\"description\" content=\"En 1994, lors d&#039;une pe\u0301riode de se\u0301cheresse se\u0301ve\u0300re, une fore\u0302t fossilise\u0301e est apparue dans le lit de la rivie\u0300re Kiso ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/une-foret-fossile-au-japon-livre-ses-secrets\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Une for\u00eat fossile au Japon livre ses secrets\" \/>\n<meta property=\"og:description\" content=\"En 1994, lors d&#039;une pe\u0301riode de se\u0301cheresse se\u0301ve\u0300re, une fore\u0302t fossilise\u0301e est apparue dans le lit de la rivie\u0300re Kiso ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/une-foret-fossile-au-japon-livre-ses-secrets\" \/>\n<meta property=\"og:site_name\" content=\"Djibouti\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-25T16:42:27+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-07-25T17:09:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2023\/07\/sm_1690292325.45129.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"899\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/une-foret-fossile-au-japon-livre-ses-secrets#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/une-foret-fossile-au-japon-livre-ses-secrets\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Une for\u00eat fossile au Japon livre ses secrets\",\"datePublished\":\"2023-07-25T16:42:27+00:00\",\"dateModified\":\"2023-07-25T17:09:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/une-foret-fossile-au-japon-livre-ses-secrets\"},\"wordCount\":506,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/une-foret-fossile-au-japon-livre-ses-secrets#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2023\/07\/sm_1690292325.45129.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Djibouti\",\"Djibouti\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/une-foret-fossile-au-japon-livre-ses-secrets#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/une-foret-fossile-au-japon-livre-ses-secrets\",\"url\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/une-foret-fossile-au-japon-livre-ses-secrets\",\"name\":\"Une for\u00eat fossile au Japon livre ses secrets - 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