{"id":117980,"date":"2018-03-11T10:47:44","date_gmt":"2018-03-11T10:47:44","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/effects-of-global-change-on-the-functioning-of-mediterranean-rivers\/"},"modified":"2018-03-11T10:47:44","modified_gmt":"2018-03-11T10:47:44","slug":"effects-of-global-change-on-the-functioning-of-mediterranean-rivers","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ecologia-vegetal\/effects-of-global-change-on-the-functioning-of-mediterranean-rivers\/","title":{"rendered":"Effects of global change on the functioning of mediterranean rivers"},"content":{"rendered":"

Tesis doctoral de Ibon Aristi De La Hoz <\/strong><\/h2>\n

Esta tesis explora los efectos del cambio global en el funcionamiento de losecosistemas de r\u00c2\u00bfos mediterr\u00c2\u00bfneos, que se ven severamente impactados por lasactividades de los humanos. Para tener una perspectiva espacial amplia, medimos latasa de descomposici\u00c2\u00bfn de palitos colocados en 66 puntos de 4 r\u00c2\u00bfos ib\u00c2\u00bfricos (ebro,llobregat, j\u00c2\u00bfcar y guadalquivir), relacion\u00c2\u00bfndola con caracter\u00c2\u00bfsticas f\u00c2\u00bfsico-qu\u00c2\u00bfmicas,biol\u00c2\u00bfgicas y geomorfol\u00c2\u00bfgicas de cada sitio. La descomposici\u00c2\u00bfn mostr\u00c2\u00bf granvariabilidad, especialmente en puntos bajos de los r\u00c2\u00bfos, estando la tasa m\u00c2\u00bfximarelacionada con la temperatura, el f\u00c2\u00bfsforo, el \u00c2\u00bfrea de cuenca, la toxicidad, losinvertebrados, la anchura de la zona riparia y las diatomeas. Tambi\u00c2\u00bfn estudiamos elefecto de la regulaci\u00c2\u00bfn del caudal por embalses, un impacto com\u00c2\u00bfn en la regi\u00c2\u00bfnmediterr\u00c2\u00bfnea. En un estudio de campo medimos los efectos de la regulaci\u00c2\u00bfn en laacumulaci\u00c2\u00bfn de materia org\u00c2\u00bfnica y en el metabolismo del ecosistema en 3 r\u00c2\u00bfos. Losembalses redujeron la frecuencia de las crecidas y promovieron la acumulaci\u00c2\u00bfn demateria org\u00c2\u00bfnica, que potenci\u00c2\u00bf el metabolismo fluvial. En otro trabajo estudiamos losefectos de la contaminaci\u00c2\u00bfn qu\u00c2\u00bfmica producida por una estaci\u00c2\u00bfn depuradora de aguasresiduales, midiendo el funcionamiento de los ecosistemas riparios aguas arriba yabajo del efluente. La mayor\u00c2\u00bfa de variables analizadas mostraron un efecto desubsidio, que probablemente reflejaba el incremento en la concentraci\u00c2\u00bfn de nutrientesy materia org\u00c2\u00bfnica, mientras que an\u00c2\u00bflisis detallados de las curvas de producci\u00c2\u00bfnirradiaci\u00c2\u00bfnmostraron evidencias de ligero estr\u00c2\u00bfs en productores primarios.Finalmente, analizamos la interacci\u00c2\u00bfn entre contaminantes asimilables y t\u00c2\u00bfxicos en unexperimento manipulativo en mesocosmos. Los nutrientes incrementaron la actividadbiol\u00c2\u00bfgica en todas las concentraciones medidas, mientras que los contaminantesemergentes produjeron algunos efectos de estr\u00c2\u00bfs tras 4 semanas de exposici\u00c2\u00bfn. Losnutrientes a concentraciones altas aliviaron el efecto toxico de estos emergentes.En general, nuestros resultados proporcionan evidencias de los importantes efectosecol\u00c2\u00bfgicos del cambio global en los r\u00c2\u00bfos mediterr\u00c2\u00bfneos y sugieren tambi\u00c2\u00bfnconsecuencias en la sociedad, en t\u00c2\u00bfrminos de servicios ecosist\u00c2\u00bfmicos.<\/p>\n

 <\/p>\n

Datos acad\u00e9micos de la tesis doctoral \u00abEffects of global change on the functioning of mediterranean rivers<\/strong>\u00ab<\/h3>\n
    \n
  • T\u00edtulo de la tesis:<\/strong>\u00a0 Effects of global change on the functioning of mediterranean rivers <\/li>\n
  • Autor:<\/strong>\u00a0 Ibon Aristi De La Hoz <\/li>\n
  • Universidad:<\/strong>\u00a0 Pa\u00eds vasco\/euskal herriko unibertsitatea<\/li>\n
  • Fecha de lectura de la tesis:<\/strong>\u00a0 29\/07\/2015<\/li>\n<\/ul>\n

     <\/p>\n

    Direcci\u00f3n y tribunal<\/h3>\n
      \n
    • Director de la tesis<\/strong>\n
        \n
      • Vicen\u00c1\u00a7 Acu\u00f1a Salazar<\/li>\n<\/ul>\n<\/li>\n
      • Tribunal<\/strong>\n
          \n
        • Presidente del tribunal: klement Tockner — <\/li>\n
        • m. luz Boyero gonz\u00e1lez (vocal)<\/li>\n
        • anna Mar\u00eda Romani cornet (vocal)<\/li>\n
        • fernanda Cassio — (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

           <\/p>\n","protected":false},"excerpt":{"rendered":"

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