{"id":5193299,"date":"2011-10-31T20:20:38","date_gmt":"2011-10-31T18:20:38","guid":{"rendered":"https:\/\/www.ozono21.com\/blog\/?p=5193299"},"modified":"2026-01-24T12:46:44","modified_gmt":"2026-01-24T10:46:44","slug":"bacterias-ya-respiraban-oxigeno-hace-2480-millones-de-anos","status":"publish","type":"post","link":"https:\/\/www.ozono21.com\/blog\/bacterias\/bacterias-ya-respiraban-oxigeno-hace-2480-millones-de-anos\/","title":{"rendered":"Bacterias ya respiraban ox\u00edgeno hace 2.480 millones de a\u00f1os"},"content":{"rendered":"<p style=\"text-align: justify;\">\n<h2 style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-5193300\" style=\"margin-left: 13px; margin-right: 13px; border: 0px;\" title=\"Bacterias ya respiraban ox\u00edgeno hace 2.480 millones de a\u00f1os\" src=\"https:\/\/www.ozono21.com\/blog\/wp-content\/uploads\/2011\/10\/bacteria3.jpg\" alt=\" Bacterias ya respiraban ox\u00edgeno  \" title=\"Ozono21\" width=\"272\" height=\"283\" \/><a title=\"OXIGENO\" href=\"https:\/\/www.ozono21.com\/blog\/?s=OXIGENO\" target=\"_blank\" rel=\"noopener noreferrer\">Bacterias ya respiraban ox\u00edgeno hace 2.480 millones de a\u00f1os<BR \/><br \/>Una investigaci\u00f3n de la Universidad Nueva de Alberta (Canad\u00e1), muestra la primera evidencia de que las bacterias que respiran ox\u00edgeno ocuparon y prosperaron en tierra firme 100 millones a\u00f1os antes de lo previsto. Investigadores muestran que la forma m\u00e1s primitiva de vida con respiraci\u00f3n aer\u00f3bica se hizo patente hace 2.480 millones de a\u00f1os<\/a><\/strong><\/h2>\n<p><\/P><\/p>\n<p>Fuente: EuropaPress (24\/10\/2011)<\/P><\/p>\n<p style=\"text-align: justify;\">El equipo de investigaci\u00f3n, dirigido por el geomicrobi\u00f3logo Kurt Konhauser, hizo su hallazgo mediante la investigaci\u00f3n de un v\u00ednculo entre los niveles de ox\u00edgeno atmosf\u00e9rico y el aumento de las concentraciones de cromo en la roca de antiguos fondos marinos.<\/P><\/p>\n<p style=\"text-align: justify;\">\u00abNosotros sugerimos que el salto en los niveles de cromo fue provocado por la oxidaci\u00f3n de la pirita mineral (oro falso) sobre la tierra\u00bb, dijo Konhauser.<\/P><\/p>\n<p style=\"text-align: justify;\"><strong>La oxidaci\u00f3n de pirita es un proceso qu\u00edmico simple impulsado por dos cosas: las bacterias y el ox\u00edgeno. Los investigadores dicen que esto demuestra que los niveles de ox\u00edgeno en la atm\u00f3sfera de la Tierra aumentaron dram\u00e1ticamente durante ese tiempo.<\/strong><\/P><\/p>\n<p style=\"text-align: justify;\">\u00abLas bacterias aer\u00f3bicas disolvieron la pirita, que desprendi\u00f3 un \u00e1cido que disuelve las rocas y suelos en un c\u00f3ctel de metales, como el cromo,\u00bb dice Konhauser. \u00abLos minerales fueron trasladados luego a los oc\u00e9anos por la escorrent\u00eda del agua de lluvia\u00bb.<\/P><\/p>\n<p style=\"text-align: justify;\">\u00abNuestro examen de los datos del fondo marino antiguo muestran c\u00f3mo los niveles de cromo aumentaron significativamente hace 2.480 millones de a\u00f1os\u00bb, dijo Konhauser. \u00abEsto nos da una nueva fecha para el Gran Evento de Oxidaci\u00f3n, el momento en que se manifest\u00f3 por primera vez el ox\u00edgeno en la atm\u00f3sfera\u00bb.<\/P><\/p>\n<p style=\"text-align: justify;\"><strong>El aumento de los niveles de ox\u00edgeno atmosf\u00e9rico impuls\u00f3 el desarrollo de nuevas especies de bacterias. Incluso dicen que el an\u00e1logo moderno de la primera forma de vida primitiva dependiente de ox\u00edgeno en la Tierra todav\u00eda est\u00e1 con nosotros.<\/strong><\/P><\/p>\n<p style=\"text-align: justify;\">\u00abLas mismas formas de vida bacteriana siguen hoy aqu\u00ed, viviendo de la pirita y la sedimentaci\u00f3n en las aguas residuales altamente \u00e1cidas de las minas en todo el mundo\u00bb, dijo Konhauser.<\/P><\/p>\n<table border=\"3\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td bgcolor=\"#3b7cff\" height=\"25\" width=\"600\" align=\"center\"><strong><a title=\"Actualidad de OZONO\" href=\"https:\/\/www.ozono21.com\/actualidad\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ozono21.com\/blog\/wp-content\/uploads\/2014\/06\/Noticias-Relacionadas.png\" alt=\"Noticias Relacionadas\" width=\"600\" height=\"25\" border=\"0\" \/><\/a><\/strong>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><big><\/p>\n<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td width=\"150\" height=\"150\" align=\"center\"><a title=\"OXIGENO\" href=\"https:\/\/www.ozono21.com\/blog\/?s=OXIGENO\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.ozono21.com\/blog\/wp-content\/uploads\/2011\/11\/o2_4.jpg\" alt=\"Bacterias ya respiraban ox\u00edgeno\" width=\"145\" height=\"145\" class=\"alignright size-full wp-image-5207224\"  style=\"margin: 10px 10px 10px 0px; 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