Now showing items 62-75 of 75
Saavedra Bendito, Deli (Date of defense: 2003-06-10)
Aquesta tesi es basa en el programa de reintroducció de la llúdriga eurasiàtica (Lutra lutra) a les conques dels rius Muga i Fluvià (Catalunya) durant la segona meitat dels 1990s. Els objectius de la tesi foren demostrar ...
Estany-Tigerström, David (Date of defense: 2013-11-29)
We investigated whether the Argentine ant (Linepithema humile) invasion modifies the trophic web of the sclerophyllous Mediterranean forests to the point that impacts co-occurring bird communities. We studied if the invaded ...
Serrat Llinàs, Alba (Date of defense: 2019-04-10)
Exploited marine fish species with an affinity for cold waters inhabiting close to the warmer edge of their distribution area are exposed to stress caused by fishing and climate change. Three case studies of “cold water ...
Cunillera-Montcusí, David (Date of defense: 2020-02-21)
During the last years, there has been an increase in the number and intensity of disturbances, and their consequences related with global change, which have corroborated the already forecasted scenarios. One example are ...
Piera Fernández, Jaume (Date of defense: 2002-03-08)
The main objective of this thesis was the integration of microstructure information in synoptic descriptors of turbulence, that reflects the mixing processes. Turbulent patches are intermittent in space and time, but they ...
Verdaguer Murlà, Dolors (Date of defense: 1995-01-12)
This thesis is a study of the structure and development of the young radicular system of Quercus suber. The work is focused on the sprouting capacity of the radicular system of the seedling, the development and organization ...
Carrasco Barea, Lorena (Date of defense: 2020-10-09)
Salt marshes are considered key ecosystems for climate regulation because they have a high carbon sequestration capacity. However, most studies of carbon sequestration capacity of these ecosystems have been performed in ...
Jiménez Ontiveros, Vicente Luis (Date of defense: 2020-06-29)
This thesis develops a quantitative approach to understanding and predicting the spatiotemporal distribution of biodiversity, based on a stochastic version of the theory of island biogeography. Here, I present R package ...
Enríquez Lenis, Martha Lucía (Date of defense: 2012-12-20)
We studied the characteristics and effects of the Argentine ant invasion on the native ants and other arthropods. Moreover, we assessed the effects of L. humile winter nest aggregations extirpation on its population dynamics. ...
Corcoll i Cornet, Natàlia (Date of defense: 2012-02-20)
Metal pollution in rivers is in great concern with human activities in the fluvial watershed. This thesis aims to investigate the potential use of chl-a fluorescence parameters as biomarkers of metal toxicity, and to find ...
Dimitriadis, Caterina (Date of defense: 2015-10-16)
Fisheries are complex systems, in which the process of assessment and management should explicitly consider the ecological, social and economic attributes of the system. For a responsible and sustainable management of ...
Santamaría Pérez, Jorge (Date of defense: 2021-09-27)
Biological invasions have become one of the most pervasive threats to native ecosystems worldwide, causing species extinctions, disrupting the functioning of ecosystems, altering the provision of critical ecosystem services ...
Caballero-Huertas, Marta (Date of defense: 2023-05-26)
Small pelagic fish play an important ecological role mainly due to their contribution in transferring energy from low to higher trophic levels. Likewise, the capture of these species is in many cases an important nutritional ...
Brucet Balmaña, Sandra (Date of defense: 2003-11-04)
Zooplankton community structure (composition, diversity, dynamics and trophic relationships) of Mediterranian marshes, has been analysed by means of a size based approach. <br/>In temporary basins the shape of the biomass-size ...