{"id":19866,"date":"2002-11-11T00:00:00","date_gmt":"2002-11-11T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/el-eslabon-fitoplancton-bacteria-en-un-ecosistema-de-alta-montana-estructura-funcion-y-regulacion\/"},"modified":"2002-11-11T00:00:00","modified_gmt":"2002-11-11T00:00:00","slug":"el-eslabon-fitoplancton-bacteria-en-un-ecosistema-de-alta-montana-estructura-funcion-y-regulacion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/microbiologia\/el-eslabon-fitoplancton-bacteria-en-un-ecosistema-de-alta-montana-estructura-funcion-y-regulacion\/","title":{"rendered":"El eslab\u00f3n fitoplancton-bacteria en un ecosistema de alta monta\u00f1a: estructura, funci\u00f3n y regulaci\u00f3n"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Juan  Manuel Medina S\u00e1nchez <\/strong><\/h2>\n<p>El objetivo gen\u00e9rico de la tesis es el estudio de los factores que regulan la interacci\u00f3n fitoplancton-bacterias, base del flujo de energ\u00eda a trav\u00e9s del bucle microbiano y la cadena de pastoreo en los ecosistemas acu\u00e1ticos. el an\u00e1lisis espacio-temporal de la estructura y din\u00e1mica de la red tr\u00f3fica pel\u00e1gica en un ecosistema oligotr\u00f3fico de alta monta\u00f1a revel\u00f3 acusadas variaciones f\u00edsico-qu\u00edmicas y biolog\u00edcas relacionadas con cambios interanuales en el r\u00e9gimen de precipitaciones, destacando el escaso desarrollo del componente microheterotr\u00f3fico, que aleja a este tipo de ecosistemas de los patrones establecidos para ecosistemas oligotr\u00f3ficos.  el an\u00e1lisis de los procesos que rigen la interacci\u00f3n comensalista (producci\u00f3n primaria, excreci\u00f3n algal de carbono fotosint\u00e9tico, su asimilaci\u00f3n bacteriana y producci\u00f3n bacteriana) revel\u00f3 que el bacteriplancton depende del carbono fotosint\u00e9tico excretado activamente por las algas. Esta dependencia, evidenciada sobre diferentes escalas de an\u00e1lisis (espacial, diaria, estacional, interanual) y cuantificada experimentalmente, constituye la base de una interacci\u00f3n alga-bacteria fundamentalmente comensalista.  la evaluaci\u00f3n experimental in situ de los efectos del espectro de radiaci\u00f3n solar sobre la actividad fitoplanct\u00f3nica y bacteriana evidenci\u00f3 que la interacci\u00f3n comensalista alga-bacteria fue favorecida por la alta intensidad de radiaci\u00f3n ultravioleta (uv) incidente en el sistema. \u00e9Sta determin\u00f3 un estr\u00e9s fisiol\u00f3gico en la fracci\u00f3n algal, manifestado en una inhibici\u00f3 de la producci\u00f3n primaria y un incremento de la tasa absoluta y relativa de excreci\u00f3n de c.Fotosint\u00e9tico.  las bacterias respondieron positivamente a esta mayor disponibilidad de c dada su adaptaci\u00f3n a la radiaci\u00f3n solar, determinada por eficientes mecanismos de fotorreparaci\u00f3n que, mediados por la radiaci\u00f3n uva y par, contrarrestan el da\u00f1o causado po uvb. El patr\u00f3n de respuesta bacteriana a<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>El eslab\u00f3n fitoplancton-bacteria en un ecosistema de alta monta\u00f1a: estructura, funci\u00f3n y regulaci\u00f3n<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 El eslab\u00f3n fitoplancton-bacteria en un ecosistema de alta monta\u00f1a: estructura, funci\u00f3n y regulaci\u00f3n <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Juan  Manuel Medina S\u00e1nchez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Granada<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 11\/11\/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>Presentacion Carrillo Lechuga<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: cristina Callieri <\/li>\n<li>f\u00e9lix L\u00f3pez figueroa (vocal)<\/li>\n<li>Antonio Quesada del corral (vocal)<\/li>\n<li>Javier Mart\u00ednez abaigar (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Juan Manuel Medina S\u00e1nchez El objetivo gen\u00e9rico de la tesis es el estudio de los factores que [&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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