{"id":660,"date":"2014-03-23T15:15:21","date_gmt":"2014-03-23T20:15:21","guid":{"rendered":"http:\/\/sciencemediacentre.ca\/site\/?p=660"},"modified":"2014-04-02T11:51:30","modified_gmt":"2014-04-02T16:51:30","slug":"evidence-for-oxygenic-photosynthesis-half-a-billion-years-before-the-great-oxidation-event","status":"publish","type":"post","link":"http:\/\/sciencemediacentre.ca\/site\/evidence-for-oxygenic-photosynthesis-half-a-billion-years-before-the-great-oxidation-event\/","title":{"rendered":"Evidence for oxygenic photosynthesis half a billion years before the Great Oxidation Event<img src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/01\/canada_flag_icon_small.gif\">"},"content":{"rendered":"<div id=\"attachment_662\" style=\"width: 510px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/03\/5479190071_40c1b0d62e.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-662\" class=\"size-full wp-image-662\" alt=\"(Credit: Mycatkins, flickr.com)\" src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/03\/5479190071_40c1b0d62e.jpg\" width=\"500\" height=\"333\" srcset=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/03\/5479190071_40c1b0d62e.jpg 500w, http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/03\/5479190071_40c1b0d62e-300x199.jpg 300w, http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/03\/5479190071_40c1b0d62e-450x300.jpg 450w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><p id=\"caption-attachment-662\" class=\"wp-caption-text\">A close-up of oxygen bubbles. (Credit: Mycatkins, <a href=\"https:\/\/www.flickr.com\/photos\/34138228@N03\/5479190071\/in\/photolist-9mbhjk-7Nsby7-iErtTf-iEpXNi-iEq1a2-iEryy7-9uVR2D-bydgoH-c3SXKq-aXFZJ2-eQnUNb-aXG1jM-8NzNSB-8jrLo7-bbRmx2-dj4W2R-8GpT3K-b7Wcr6-8txT2m-9ytRTu-9ytRWJ-bZYH1q-98pGP2-fQmHRg-fQmLvn-fQjJ2V-fQmTwr-fQmQcc-b34LMV-fGdKf3-dFmi5y-839vEt-8bJoA9-bB17xe-81A2FW-jxapRc-dY8dwh-gDiFWx-edaVQf-cfngYA-9W7jpp-jtLwJr-cu9gPj\" target=\"_blank\">flickr.com<\/a>)<\/p><\/div>\n<p>The early Earth was characterized by the absence of oxygen which first rose due to photosynthesis during the Great Oxidation Event 2.3-2.5 billions years ago. Now, researchers have found markers in 2.95 billion year old rocks from South Africa that show oxygen was already at a significant levels. This finding shows that organisms were doing photosynthesis 500 millions years before the Great Oxidation Event in such a way that oxygen started to accumulate in shallow marine settings.<\/p>\n<p><!--more--><\/p>\n<p><a href=\"http:\/\/www.nature.com\/ngeo\/journal\/v7\/n4\/full\/ngeo2122.html\" target=\"_blank\"><span style=\"text-decoration: underline;\">Original research paper<\/span>\u00a0<\/a>published in the journal\u00a0<em>Nature Geoscience<\/em>\u00a0on\u00a0<strong>March 23, 2014<\/strong>.<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>Names and affiliations of selected authors<\/strong><\/span><\/p>\n<h4><a href=\"http:\/\/easweb.eas.ualberta.ca\/page\/directory\/?person=pecoe\" target=\"_blank\">Ernesto Pecoits<\/a>, Department of Earth and Atmospheric Sciences, University of Alberta<\/h4>\n<h4><a href=\"http:\/\/faculty.eas.ualberta.ca\/konhauser\/\" target=\"_blank\">Kurt O. Konhauser<\/a>, Department of Earth and Atmospheric Sciences, University of Alberta<\/h4>\n","protected":false},"excerpt":{"rendered":"<p>The early Earth was characterized by the absence of oxygen which first rose due to photosynthesis during the Great Oxidation Event 2.3-2.5 billions years ago. Now, researchers have found markers in 2.95 billion year old rocks from South Africa that show oxygen was already at a significant levels. This finding shows that organisms were doing [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":662,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[25],"tags":[180],"class_list":["post-660","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paper-of-interest","tag-alberta"],"jetpack_featured_media_url":"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/03\/5479190071_40c1b0d62e.jpg","jetpack_shortlink":"https:\/\/wp.me\/p4DqbN-aE","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/660","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/comments?post=660"}],"version-history":[{"count":3,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/660\/revisions"}],"predecessor-version":[{"id":680,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/660\/revisions\/680"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media\/662"}],"wp:attachment":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media?parent=660"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/categories?post=660"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/tags?post=660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}