Batllori Presas, Enric (Date of defense: 2008-05-28)
El límit altitudinal del bosc, o ecotò superior bosc-prat alpí, constitueix per definició, la frontera entre l'estatge subalpí i l'estatge alpí separant, per tant, sistemes ecològics adjacents. És una ...
Marcé Romero, Rafael (Date of defense: 2007-05-29)
The role of the materials coming from the watershed on the reservoir water quality is an emergent area of high scientific interest with many practical implications. In this study we investigated the ...
Castillo Jurado, Marcos del (Date of defense: 2003-12-16)
Se estudia por vez primera la morfología de todas las superficies de agua con al menos media hectárea de todo el Pirineo. Caracterizamos morfométricamente estos lagos en base a variables tradicionales, ...
Navarro Rodríguez, Enrique (Date of defense: 2001-12-19)
Desde los albores de la civilización, los ríos son una de las vías habituales usadas por el hombre para desprenderse de parte de sus desechos. Por ello, los sistemas fluviales han sido espectadores ...
Ballesteros Larrotta, Tania Marcela (Date of defense: 2016-02-08)
The Gran Sabana (GS, Northern South America) is a humid savanna region (treeless savanna intermingled with forest patches) with a long history of vegetation changes under fire disturbances. A number of ...
Nikolakopoulou, Myrto-Georgia (Date of defense: 2021-01-29)
Freshwater degradation has been largely attributed to excess nutrient concentrations of anthropogenic origin. Freshwater degradation in combination with water scarcity are the reason of severe stress ...
Cid Puey, Núria (Date of defense: 2010-11-18)
The effects of the main anthropogenic impacts in the fluvial ecosystem of the lower Ebro River are evaluated along the five chapters of the present thesis, using the benthic macroinvertebrate community ...
Merbt, Stephanie Nikol (Date of defense: 2015-01-23)
The main goal of this PhD thesis was the study of the ammonium oxidation process in high nutrient loaded urban streams. We aimed to unveil regulating factors and driving mechanisms from the organisms ...
Muñoz Gràcia, Isabel (Date of defense: 1990-02-23)
La major part de la concentració de carboni i nitrogen que arriba al Mediterrani des de l'Ebre és en forma dissolta, mentre que en el cas del fòsfor la concentració en la forma particulada pot ser més ...
Hereu Fina, Bernat (Date of defense: 2007-04-28)
The discipline of ecology is habitually divided up into a whole range of different specialities, and this thesis forms part of what is commonly known as "community ecology" (Diamond and Case 1986). To ...