Ara mostrant els elements 11-20 de 49
Prado Villegas, Patricia (Data de defensa: 2007-02-23)
La revaluació a gran escala espacial (> de 300 Km) i mitjançant mètodes de quantificació directa, del impacte de l'herbivorisme en els ecosistemes de <i>Posidonia oceanica</i> va revelar pèrdues de ...
Ribot Bermejo, Miquel (Data de defensa: 2015-03-27)
Human activities have increased dissolved inorganic nitrogen (DIN) availability and modified the relative proportion of DIN as NO3- or NH4+ in running waters. Because nitrogen (N) is an essential element ...
Andreu Hayles, Laia (Data de defensa: 2007-10-25)
Two main purposes divided this Thesis into two parts, taking into account that the need of understanding current climatic fluctuations is still an important request of population living in the 21st ...
Marcé Romero, Rafael (Data de defensa: 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 ...
Ballesteros Larrotta, Tania Marcela (Data de defensa: 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 (Data de defensa: 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 ...
Merbt, Stephanie Nikol (Data de defensa: 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 ...
Hereu Fina, Bernat (Data de defensa: 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 ...
Vilalta Baliellas, Elisabet (Data de defensa: 2004-07-26)
The role of natural biofilms affecting the water quality in rivers has been the main theme in this study. Firstly, the study developed the capacity of biofilms in retention and/or production of DOC. ...
Gaudes Saez, Ainhoa (Data de defensa: 2011-07-07)
This thesis focuses on the study of the meiofaunal community in streams and rivers of the Mediterranean region. It approaches to a community level from a functional point of view, studying their response ...