{"id":54162,"date":"2019-09-06T10:32:51","date_gmt":"2019-09-06T07:32:51","guid":{"rendered":"http:\/\/realitatearutiera.ro\/?p=54162"},"modified":"2019-09-06T10:32:57","modified_gmt":"2019-09-06T07:32:57","slug":"noi-indicii-descoperite-in-roci-sugereaza-ca-prima-mare-extinctie-a-avut-loc-in-urma-cu-peste-doua-milarde","status":"publish","type":"post","link":"https:\/\/realitatearutiera.ro\/?p=54162","title":{"rendered":"Noi indicii descoperite \u00een roci sugereaz\u0103 c\u0103 prima mare extinc\u0163ie a avut loc \u00een urm\u0103 cu peste dou\u0103 milarde"},"content":{"rendered":"\n<p>\u00cen mod conven\u0163ional, oamenii de \u015ftiin\u0163\u0103 accept\u0103 existen\u0163a a cinci mari extinc\u0163ii \u00een istoria P\u0103m\u00e2ntului.<\/p>\n\n\n\n<p>Folosind informa\u0163iile oferite de diferitele fosile descoperite de-a lungul timpului, oamenii de \u015ftiin\u0163\u0103 au ajuns la concluzia c\u0103 \u00een evolu\u0163ia vie\u0163ii biologice au existat cinci mari extinc\u0163ii. Totu\u015fi, noi indicii descoperite \u00een roci sugereaz\u0103 c\u0103 prima mare extinc\u0163ie a avut loc \u00een urm\u0103 cu peste dou\u0103 milarde \u015fi a afectat organismele unicelulare, noteaz\u0103&nbsp;<a href=\"http:\/\/www.sciencealert.com\/even-more-evidence-arises-for-a-die-off-bigger-than-the-dinosaurs?fbclid=IwAR3BH6_UsXf_6s28GdTPsRelBt6OPfQVCfD-0eKXNA-K9ekeqhwbnezR3Hs\" rel=\"noreferrer noopener\" target=\"_blank\">Science Alert<\/a>.<\/p>\n\n\n\n<p>Dovezile din diferite roci sugereaz\u0103 c\u0103 \u00een urm\u0103 cu peste dou\u0103 miliarde de ani a avut loc cea mai mare extinc\u0163ie \u00een mas\u0103 din istoria P\u0103m\u00e2ntului, afect\u00e2nd organismele unicelulare. Aceast\u0103 extinc\u0163ie, conform oamenilor de \u015ftiin\u0163\u0103, a dep\u0103\u015fit-o \u015fi pe cea a&nbsp;<a href=\"https:\/\/www.descopera.ro\/natura\/2395782-cand-au-disparut-de-fapt-dinozaurii\" target=\"_blank\" rel=\"noreferrer noopener\">dinozaurilor<\/a>.<\/p>\n\n\n\n<p>\u201eAceast\u0103 descoperire sugereaz\u0103 c\u0103 chiar \u015fi atunci c\u00e2nd via\u0163a biologic\u0103 era format\u0103 din microorganisme, a existat un eveniment care poate fi clasificat drept extinc\u0163ie \u00een mas\u0103 care nu a r\u0103mas &lt;&lt;consemnat&gt;&gt; \u00een fosilele descoperite de c\u0103tre oamenii de \u015ftiin\u0163\u0103\u201d, a declarat geologul Malcolm Hodgskiss de la Universitatea Stanford.<\/p>\n\n\n\n<p>\u00cen urm\u0103 cu 2,4 miliarde de ani, oxigenul, un element fundamental vie\u0163ii biologice actuale, reprezenta o raritate \u00een atmosfera Terrei. Aceast\u0103 situa\u0163ie s-a schimbat odat\u0103 cu apari\u0163ia cianobacteriilor, acestea fiind capabile de fotosintez\u0103. Folosind lumina solar\u0103, aceste bacterii au crescut masiv concentra\u0163ia de oxigen din atmosfera terestr\u0103, fenomenul fiind cunoscut sub numele de \u201e<a href=\"https:\/\/www.descopera.ro\/natura\/17231380-asa-arata-pamantul-in-urma-cu-24-miliarde-de-ani\" target=\"_blank\" rel=\"noreferrer noopener\">Marea Oxigenare<\/a>\u201d.&nbsp;<\/p>\n\n\n\n<p>\u00cen acest punct, oamenii de \u015ftiin\u0163\u0103 sunt de p\u0103rere c\u0103 bacteriile au ajuns \u00eentr-un punct \u00een care&nbsp;<a href=\"https:\/\/www.descopera.ro\/dnews\/9670700-secretele-fierbinti-ale-aparitiei-vietii-pe-terra\" target=\"_blank\" rel=\"noreferrer noopener\">biosfera<\/a>&nbsp;nu putea s\u0103 asigure resursele reproducerii continue, implica\u0163iile fiind o sc\u0103dere a produc\u0163iei de oxigen cauzat\u0103 de o dispari\u0163ie a unei propor\u0163ii importante a vie\u0163ii bacteriene din oceanele Terrei.&nbsp;<\/p>\n\n\n\n<p>Pe scurt, oamenii de \u015ftiin\u0163\u0103 argumenteaz\u0103 c\u0103 via\u0163a bacterian\u0103 care a tr\u0103it \u00een urm\u0103 cu 2 miliarde de ani a ajuns \u00een punctul extinc\u0163iei din cauza reproducerii nesustenabile care nu putea fi sus\u0163inut\u0103 de cantitatea de resurse disponibil\u0103. Cercet\u0103torii explic\u0103 c\u0103 aceast\u0103 situa\u0163ie a dus la cele mai majore schimb\u0103ri biotice, mai mari chiar \u015fi dec\u00e2t dispari\u0163ia a dou\u0103 treimi dintre plantele \u015fi animalele planetei.<\/p>\n\n\n\n<p>\u201e\u00cen mod cumulativ, aceste descoperiri sugereaz\u0103 c\u0103 finalul Marii Oxigen\u0103ri a fost una dintre cele mai mari transform\u0103ri la nivelul reproducerii biomului \u201d, explic\u0103 autorii \u00een studiul lor.<\/p>\n\n\n\n<p>Studiul citat a fost publicat \u00een\u00a0<em>Proceedings of the National Academy of Sciences<\/em>.<\/p>\n\n\n\n<p>sursa: descopera.ro<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00cen mod conven\u0163ional, oamenii de \u015ftiin\u0163\u0103 accept\u0103 existen\u0163a a cinci mari extinc\u0163ii \u00een istoria P\u0103m\u00e2ntului. Folosind informa\u0163iile oferite de diferitele<\/p>\n","protected":false},"author":1,"featured_media":54163,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":"","jetpack_publicize_message":""},"categories":[12],"tags":[],"class_list":["post-54162","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-stiri-internationale"],"jetpack_featured_media_url":"https:\/\/i2.wp.com\/realitatearutiera.ro\/wp-content\/uploads\/2019\/09\/permian-triassic_extinction_event_1.jpg?fit=599%2C359&ssl=1","jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p61naM-e5A","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts\/54162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=54162"}],"version-history":[{"count":1,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts\/54162\/revisions"}],"predecessor-version":[{"id":54164,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/posts\/54162\/revisions\/54164"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=\/wp\/v2\/media\/54163"}],"wp:attachment":[{"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=54162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=54162"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/realitatearutiera.ro\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=54162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}