{"id":15927,"date":"2002-07-03T00:00:00","date_gmt":"2002-07-03T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/biologa%c2%ada-de-poblaciones-de-erucastrum-nasturtiifolium-poiret-o-e-schulz-cruciferae\/"},"modified":"2002-07-03T00:00:00","modified_gmt":"2002-07-03T00:00:00","slug":"biologa%c2%ada-de-poblaciones-de-erucastrum-nasturtiifolium-poiret-o-e-schulz-cruciferae","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/biologa%c2%ada-de-poblaciones-de-erucastrum-nasturtiifolium-poiret-o-e-schulz-cruciferae\/","title":{"rendered":"Biolog\u00eda de poblaciones de erucastrum nasturtiifolium (poiret) o.e.schulz (cruciferae)"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Lourdes Chamorro Lorenzo <\/strong><\/h2>\n<p>En esta tesis doctoral se han abordado diversos aspectos de la biolog\u00eda de poblaciones de eurcastrum nasturtiifolium (o.E.) Schulz con el objeto de profundizar en las diferencias biol\u00f3gicas y en los mecanismos de colonizaci\u00f3n y persistencia en h\u00e1bitats que difieren en el grado de perturbaci\u00f3n y disponibilidad de recursos. Para ello se han estudiado diversas poblaciones de e.Nasturtiifolium del ne de la pen\u00ednsula ib\u00e9rica procedentes de h\u00e1bitats naturales, como las zonas erosionadas de monta\u00f1a, y de h\u00e1bitats agr\u00edcolas como los cultivos de secano.  el an\u00e1lisis del sistema reproductivo, mediante cruzamientos pol\u00ednicos y a trav\u00e9s de un gradiente de consanguinidad, indica que e.Nasturtiifolium es una especie predominante al\u00f3gama y que la baja eficacia reproductiva de las autopolinizaciones responde a un sistema de autoincompatibilitat esporof\u00edtico m\u00e1s que a un efecto por depresi\u00f3n consangu\u00ednea.  el estudio de los atributos biol\u00f3gicos en condiciones homog\u00e9neas y en un gradiente de recursos ha permitido constatar la existencia de variabilidad gen\u00e9tica entre las poblaciones de e.Nasturtiifolium en relaci\u00f3n con el h\u00e1bitat que colonizan. As\u00ed, las poblaciones de h\u00e1bitats naturales presentan generalmente un ciclo vital bienal o perenne mientras que las poblaciones arvenses son de ciclo anual.  el estudio de la din\u00e1mica de poblaciones de e.Nasturtiifolium de los h\u00e1titats agr\u00edcolas en relaci\u00f3n con el tipo de cultivo y manejo ha permitido constatar que en cultivos con baja frecuencia de perturbaciones, como la rotaci\u00f3n cereal-barbecho o el monocultivo de cereal, las poblaciones de e.Nasturtiifolium permanecen estables gracias a la elevada supervivencia y fecundidad de los individuos.  sin embargo en cultivos con una elevada frecuencia de las perturbaciones, como los cultivos le\u00f1osos, las poblaciones tienden a la extinci\u00f3n a causa de la reducci\u00f3n del banco de semillas provocada por las continuas emergencias y la eleva<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Biolog\u00eda de poblaciones de erucastrum nasturtiifolium (poiret) o.e.schulz (cruciferae)<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Biolog\u00eda de poblaciones de erucastrum nasturtiifolium (poiret) o.e.schulz (cruciferae) <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Lourdes Chamorro Lorenzo <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 07\/03\/2002<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Francisco Javier Sans Serra<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Masalles i suamell ramon Mar\u00eda <\/li>\n<li>jordi Recasens guinJuan (vocal)<\/li>\n<li>montserrat Aguade porres (vocal)<\/li>\n<li> Escarr\u00e9 i blanch josep (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Lourdes Chamorro Lorenzo En esta tesis doctoral se han abordado diversos aspectos de la biolog\u00eda de poblaciones [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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