{"id":477,"date":"2021-11-25T19:08:30","date_gmt":"2021-11-25T19:08:30","guid":{"rendered":"https:\/\/natureduca.com\/aula\/?p=477"},"modified":"2021-12-01T15:21:14","modified_gmt":"2021-12-01T15:21:14","slug":"ecologia-general-el-ciclo-del-nitrogeno-2a-parte","status":"publish","type":"post","link":"https:\/\/natureduca.com\/aula\/ecologia-general-el-ciclo-del-nitrogeno-2a-parte\/","title":{"rendered":"ECOLOG\u00cdA GENERAL &#8211; EL CICLO DEL NITR\u00d3GENO &#8211; 2\u00aa PARTE"},"content":{"rendered":"\t\t\t\t<div class=\"wp-block-uagb-table-of-contents uagb-toc__align-left uagb-toc__columns-1  uagb-block-0001a6a8      \"\n\t\t\t\t\tdata-scroll= \"1\"\n\t\t\t\t\tdata-offset= \"30\"\n\t\t\t\t\tstyle=\"\"\n\t\t\t\t>\n\t\t\t\t<div class=\"uagb-toc__wrap\">\n\t\t\t\t\t\t<div class=\"uagb-toc__title\">\n\t\t\t\t\t\t\tTabla de contenidos\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"uagb-toc__list-wrap \">\n\t\t\t\t\t\t<ol class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#profundizando-en-el-proceso-del-ciclo-del-nitr\u00f3geno\" class=\"uagb-toc-link__trigger\">Profundizando en el proceso del ciclo del nitr\u00f3geno<\/a><ul class=\"uagb-toc__list\"><li class=\"uagb-toc__list\"><a href=\"#introducci\u00f3n\" class=\"uagb-toc-link__trigger\">Introducci\u00f3n<\/a><\/ul><\/ol>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\n\n\n<h2 class=\"wp-block-heading\">Profundizando en el proceso del ciclo del nitr\u00f3geno<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Introducci\u00f3n<\/h3>\n\n\n\n<p class=\"has-drop-cap\">Est\u00e1 convenido que el nitr\u00f3geno constituye uno de los principales nutrientes, indispensables para la supervivencia de todos los organismos vivos. Es un componente necesario de muchas biomol\u00e9culas, incluyendo prote\u00ednas, ADN y la clorofila (presente en las cianobacterias y otros microorganismos con cloroplastos).<\/p>\n\n\n\n<p>El nitr\u00f3geno es muy abundante en la atm\u00f3sfera en forma de gas nitroso (N2), pero la mayor\u00eda de los organismos no pueden acceder a \u00e9l en forma aprovechable, convirti\u00e9ndose en un recurso escaso, y en muchas ocasiones siendo la principal causa de que variados ecosistemas queden limitados en su productividad.<\/p>\n\n\n\n<p>Solo cuando el nitr\u00f3geno es convertido de gas dinitr\u00f3geno (nitr\u00f3geno molecular) en amon\u00edaco (NH3), queda disponible para ser asimilado por los productores primarios, como las plantas.<\/p>\n\n\n\n<p>Adem\u00e1s de gas nitroso (N2) y amon\u00edaco (NH3), el nitr\u00f3geno se presenta en muchas formas diferentes, incluyendo formas inorg\u00e1nicas (ejemplo, amon\u00edaco, nitrato) y formas org\u00e1nicas (ejemplo, amino\u00e1cidos y \u00e1cidos nucleicos). En el ecosistema el nitr\u00f3geno sufre muchas transformaciones diferentes, y los microorganismos aprovechan o participan para su propio&nbsp; crecimiento en el proceso de cambio de una forma a otra.<\/p>\n\n\n\n<p>La productividad en la biosfera depende, en gran medida, de una serie de actividades de diversos microorganismos, como son las bacterias, arqueas y hongos. La clave de esa productividad se encuentra en la transformaci\u00f3n del nitr\u00f3geno en sus m\u00faltiples estados de oxidaci\u00f3n.<\/p>\n\n\n\n<p>Es una evidencia, que desde comienzos del pasado siglo XX, los humanos han influido en el ciclo global del nitr\u00f3geno, ejerciendo un impacto creciente. La fabricaci\u00f3n de fertilizantes, as\u00ed como la combusti\u00f3n de hidrocarburos y otras materias de origen f\u00f3sil, ha alterado de forma significativa el nivel de nitr\u00f3geno fijado en los ecosistemas terrestres. M\u00e1s a\u00fan, expertos predicen que dentro de pocas d\u00e9cadas la cantidad de nitr\u00f3geno fijado por actividades humanas, superar\u00e1 la realizada por procesos microbianos (descrito por el bi\u00f3logo Peter Vitousek en 1997).<\/p>\n\n\n\n<p>El aumento del nitr\u00f3geno disponible puede causar la alteraci\u00f3n de los ecosistemas en forma de aumento de la productividad primaria, impactando en el almacenamiento de carbono (descrito previamente por el bioqu\u00edmico James N. Galloway, en 1994). Es por ello que los ecologistas est\u00e1n prestando una gran atenci\u00f3n a este tema, debido a la importancia que tiene el nitr\u00f3geno y sus transformaciones en todos los ecosistemas.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img title=\" \"decoding=\"async\" src=\"https:\/\/natureduca.com\/images_cienc\/ciclo_nitrogeno_ampliado1.jpg\" alt=\" \"\/><\/figure><\/div>\n\n\n\n<p>Las grandes transformaciones del nitr\u00f3geno son (v\u00e9ase el gr\u00e1fico superior):<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Fijaci\u00f3n del nitr\u00f3geno<\/li><li>Nitrificaci\u00f3n<\/li><li>Desnitrificaci\u00f3n<\/li><li>Anammox<\/li><li>Amonificaci\u00f3n<\/li><\/ul>\n\n\n\n<p>En las siguientes p\u00e1ginas veremos estos procesos por separado.<\/p>\n\n\n\n<p class=\"has-text-align-center\"> <a href=\"https:\/\/natureduca.com\/aula\/indice-ecologia\/\"><img title=\" \"decoding=\"async\" src=\"https:\/\/natureduca.com\/logos\/1ciencia2.jpg\" alt=\" \"><br><span style=\"font-size: medium;\">\u00cdndice Ecolog\u00eda<\/span><\/a> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Profundizando en el proceso del ciclo del nitr\u00f3geno Introducci\u00f3n Est\u00e1 convenido que el nitr\u00f3geno constituye uno de los principales nutrientes, indispensables para la supervivencia de todos los organismos vivos. Es un componente necesario de muchas biomol\u00e9culas, incluyendo prote\u00ednas, ADN y la clorofila (presente en las cianobacterias y otros microorganismos con&#8230;<\/p>\n<p class=\"continue-reading-button\"> <a class=\"continue-reading-link\" href=\"https:\/\/natureduca.com\/aula\/ecologia-general-el-ciclo-del-nitrogeno-2a-parte\/\">Seguir leyendo&#8230;<i class=\"crycon-right-dir\"><\/i><\/a><\/p>\n","protected":false},"author":3,"featured_media":-1,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[7],"tags":[90,4,5,92,38],"class_list":["post-477","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ecologia","tag-ciclo","tag-ecologia","tag-general","tag-nitrogeno","tag-parte"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ECOLOG\u00cdA GENERAL - EL CICLO DEL NITR\u00d3GENO - 2\u00aa PARTE - Aula de Naturaleza educativa<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/natureduca.com\/aula\/ecologia-general-el-ciclo-del-nitrogeno-2a-parte\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ECOLOG\u00cdA GENERAL - EL CICLO DEL NITR\u00d3GENO - 2\u00aa PARTE - Aula de Naturaleza educativa\" \/>\n<meta property=\"og:description\" content=\"Profundizando en el proceso del ciclo del nitr\u00f3geno Introducci\u00f3n Est\u00e1 convenido que el nitr\u00f3geno constituye uno de los principales nutrientes, indispensables para la supervivencia de todos los organismos vivos. 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Es un componente necesario de muchas biomol\u00e9culas, incluyendo prote\u00ednas, ADN y la clorofila (presente en las cianobacterias y otros microorganismos con... 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