Yakla\u015f\u0131k 252 milyon y\u0131l \u00f6nce, D\u00fcnya, B\u00fcy\u00fck \u00d6l\u00fcm olarak bilinen en k\u00f6t\u00fc toplu yok olu\u015f olay\u0131n\u0131 ya\u015fad\u0131. Bu felaket olay s\u0131ras\u0131nda, kara t\u00fcrlerinin yakla\u015f\u0131k %75’i ve deniz t\u00fcrlerinin %90’\u0131 yok oldu. Bu yok olu\u015f olay\u0131, on y\u0131llard\u0131r bir gizem olarak kald\u0131 ve bilim insanlar\u0131 b\u00f6ylesine yayg\u0131n bir y\u0131k\u0131ma neden olan su\u00e7luyu arad\u0131lar.<\/p>\n\n
B\u00fcy\u00fck \u00d6l\u00fcm’deki ba\u015fl\u0131ca \u015f\u00fcphelilerden biri, Sibirya Tuza\u011f\u0131 olarak bilinen bir dizi b\u00fcy\u00fck volkanik patlamad\u0131r. Bu patlamalar, Sibirya’n\u0131n t\u00fcm Bat\u0131 Avrupa’ya e\u015fit bir alan\u0131n\u0131 kaplayan D\u00fcnya y\u00fczeyine muazzam miktarda magma ve lav p\u00fcsk\u00fcrtt\u00fc. Bilim insanlar\u0131, bu patlamalar\u0131n atmosfere zehirli gazlar ve par\u00e7ac\u0131klar salm\u0131\u015f olabilece\u011fine ve bunun da k\u00fcresel bir \u00e7evre felaketine yol a\u00e7t\u0131\u011f\u0131na inan\u0131yor.<\/p>\n\n
Sibirya Tuza\u011f\u0131 patlamalar\u0131n\u0131n B\u00fcy\u00fck \u00d6l\u00fcm’\u00fcn tetikleyicisi olup olmad\u0131\u011f\u0131n\u0131 belirlemek i\u00e7in bilim insanlar\u0131n\u0131n her iki olay i\u00e7in de kesin bir zaman \u00e7izelgesi olu\u015fturmalar\u0131 gerekiyordu. Daha \u00f6nceki \u00e7al\u0131\u015fmalar, iki olay\u0131n birbirinden birka\u00e7 milyon y\u0131l i\u00e7inde meydana geldi\u011fini tahmin etmi\u015fti, ancak tam s\u0131ra belirsizdi.<\/p>\n\n
Son ara\u015ft\u0131rmalar, hem toplu yok olu\u015fu hem de Sibirya Tuza\u011f\u0131 patlamalar\u0131n\u0131 daha kesin bir \u015fekilde tarihlendirdi. Bilim insanlar\u0131, toplu yok olu\u015f olay\u0131n\u0131n 252 milyon y\u0131l \u00f6nce 60.000 y\u0131ll\u0131k bir s\u00fcre i\u00e7inde ger\u00e7ekle\u015fti\u011fini belirlediler. Ayr\u0131ca, Sibirya Tuza\u011f\u0131 patlamalar\u0131n\u0131n toplu yok olu\u015ftan yakla\u015f\u0131k 300.000 y\u0131l \u00f6nce ba\u015flad\u0131\u011f\u0131n\u0131 ve yakla\u015f\u0131k 500.000 y\u0131l sonra da devam etti\u011fini hesaplad\u0131lar.<\/p>\n\n
Yeni zaman \u00e7izelgesi, Sibirya Tuza\u011f\u0131’ndan gelen magmatizman\u0131n B\u00fcy\u00fck \u00d6l\u00fcm i\u00e7in olas\u0131 bir tetikleyici oldu\u011funu g\u00f6stermektedir. Bununla birlikte, bilim insanlar\u0131 hala kitlesel \u00f6l\u00fcmlerin patlamalar ba\u015flad\u0131ktan y\u00fczbinlerce y\u0131l sonras\u0131na kadar neden ba\u015flamad\u0131\u011f\u0131n\u0131 ara\u015ft\u0131r\u0131yorlar. Bir teori, gezegenin yaln\u0131zca kritik hacimde magma p\u00fcsk\u00fcrd\u00fckten sonra bir d\u00f6n\u00fcm noktas\u0131na ula\u015ft\u0131\u011f\u0131d\u0131r. Bir di\u011fer olas\u0131l\u0131k ise, toplu yok olu\u015f ba\u015flamadan hemen \u00f6nce yaln\u0131zca k\u00fc\u00e7\u00fck miktarlarda magman\u0131n p\u00fcsk\u00fcrm\u00fc\u015f olmas\u0131d\u0131r.<\/p>\n\n
Sibirya Tuza\u011f\u0131 patlamalar\u0131n\u0131n D\u00fcnya’n\u0131n \u00e7evresi \u00fczerinde derin bir etkisi oldu. Magma ve lav p\u00fcsk\u00fcrtmenin yan\u0131 s\u0131ra, patlamalar atmosfere b\u00fcy\u00fck miktarlarda karbondioksit de sald\u0131. Bu, okyanuslar\u0131n asitli\u011finde ani bir art\u0131\u015fa neden oldu ve bu da bir\u00e7ok deniz t\u00fcr\u00fcn\u00fcn yok olmas\u0131na yol a\u00e7t\u0131.<\/p>\n\n
Kara canl\u0131lar\u0131 da yok olmakla kar\u015f\u0131 kar\u015f\u0131ya kald\u0131, ancak kesin nedenler hala belirsiz. Teoriler aras\u0131nda y\u00fcksek atmosfer s\u0131cakl\u0131klar\u0131, b\u00fcy\u00fck yang\u0131nlar ve limon suyu kadar asitli ya\u011fmurlar yer al\u0131yor.<\/p>\n\n
Bilim insanlar\u0131 B\u00fcy\u00fck \u00d6l\u00fcm’\u00fc anlamada \u00f6nemli ilerlemeler kaydetmi\u015f olsalar da, bir\u00e7ok soru cevaps\u0131z kal\u0131yor. Ara\u015ft\u0131rmac\u0131lar, Sibirya Tuza\u011f\u0131’ndan gelen magmatizman\u0131n b\u00f6ylesine yayg\u0131n bir y\u0131k\u0131ma neden oldu\u011fu kesin mekanizmalar\u0131 hala ara\u015ft\u0131r\u0131yorlar. Ayr\u0131ca patlamalar\u0131n \u00e7evresel etkilerini ve Permiyen yok olu\u015funun uzun vadeli sonu\u00e7lar\u0131n\u0131 da ara\u015ft\u0131r\u0131yorlar.<\/p>\n\n
B\u00fcy\u00fck \u00d6l\u00fcm, D\u00fcnya’daki ya\u015fam\u0131n evrimi \u00fczerinde derin bir etki yaratt\u0131. \u00c7ok say\u0131da t\u00fcr\u00fcn yok olmas\u0131, yeni t\u00fcrlerin ortaya \u00e7\u0131kmas\u0131na ve \u00e7e\u015fitlenmesine izin veren ekolojik ni\u015fler yaratt\u0131. Bu olay, bug\u00fcn g\u00f6rd\u00fc\u011f\u00fcm\u00fcz biyolojik \u00e7e\u015fitlili\u011fi \u015fekillendirmede \u00e7ok \u00f6nemli bir rol oynad\u0131.<\/p>\n\n
B\u00fcy\u00fck \u00d6l\u00fcm’\u00fc anlamak, yaln\u0131zca D\u00fcnya’n\u0131n jeolojik tarihine \u0131\u015f\u0131k tutmakla kalmaz, ayn\u0131 zamanda gelece\u011fe y\u00f6nelik \u00e7\u0131kar\u0131mlara da sahiptir. Ge\u00e7mi\u015fteki toplu yok olu\u015f olaylar\u0131n\u0131 inceleyerek bilim insanlar\u0131, gelecekteki \u00e7evre felaketlerinin potansiyel etkileri ve D\u00fcnya’daki ya\u015fam\u0131n bu t\u00fcr zorluklara nas\u0131l tepki verebilece\u011fi hakk\u0131nda de\u011ferli bilgiler edinebilirler.<\/p>","protected":false},"excerpt":{"rendered":"
The Great Dying: B\u00fcy\u00fck \u00d6l\u00fcm Permiyen Yok Olu\u015fu: D\u00fcnyan\u0131n En K\u00f6t\u00fc Toplu Yok Olu\u015f Olay\u0131 Yakla\u015f\u0131k 252 milyon y\u0131l \u00f6nce, D\u00fcnya, B\u00fcy\u00fck \u00d6l\u00fcm olarak bilinen en k\u00f6t\u00fc toplu yok olu\u015f…<\/p>\n","protected":false},"author":6,"featured_media":24006,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[558,36,207,561,137,559,560],"class_list":["post-201","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paleontology","tag-great-dying","tag-environmental-science","tag-geology","tag-mass-extinction","tag-paleontology","tag-permian-extinction","tag-siberian-traps"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/posts\/201","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/comments?post=201"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/posts\/201\/revisions"}],"predecessor-version":[{"id":202,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/posts\/201\/revisions\/202"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/media\/24006"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/media?parent=201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/categories?post=201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/tags?post=201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}