Now showing items 45-55 of 55

    Reproductive and condition status of “cold water” marine fish: new insights from a changing environment 

    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 ...

    Resilience of aquatic metacommunities: implications for disturbance recovery 

    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 ...

    Stream biofilm responses to flow intermittency 

    Timoner Amer, Xisca (Date of defense: 2014-05-05)

    Streams experiencing a recurrent non-flow phase (i.e., flow intermittency) are characteristic of world regions with arid and semi-arid climates, where Mediterranean regions are part of. During non-flow streambed sediments, ...

    The role of fungi and bacteria on the organic matter decomposition process in streams: interaction and relevance in biofilms 

    Artigas Alejo, Joan (Date of defense: 2008-12-19)

    L'objectiu d'aquest estudi és el d'investigar sobre l'ús de matèria orgànica per part dels fongs i bacteris que colonitzen diferents substrats bentònics en rius Mediterranis i analitzar l'efecte dels factors ambientals i ...

    The use of pulse amplitude modulated fluorescence techniques for metal toxicity assessment in fluvial biofilms 

    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 ...

    Towards the implementation of a biotechnology for biogas upgrading: role of bacteria in siloxane removal 

    Boada Cahueñas, Ellana (Date of defense: 2020-07-20)

    Biogas is a highly recognized alternative to fossil fuels towards a sustainable energy production. Massive use of biogas depends on the removal of contaminants that may affect performance of processing equipment and energy ...

    Trace elements biogeochemistry in high mountain lake catchments: identifying anthropogenic versus natural components from the atmospheric contamination legacy in remote natural areas 

    Bacardit Peñarroya, Montserrat (Date of defense: 2011-06-01)

    Human activities have been interfering with the natural biogeochemical cycles of trace elements since the ancient civilizations. Although they are inaccessible and remote, high mountain lake catchments are irrefutably ...

    Transport, distribution and fate of emerging contaminants in wastewater-receiving rivers under multiple stress conditions 

    Mandarić, Ladislav (Date of defense: 2018-10-24)

    The main aim of this thesis was to establish a link between the urban origin of chemical contamination (e.g. PhACs) and other stressors, particularly associated to water scarcity (Chapter 1, 2, and 3). Research has been ...

    Understanding the ecological success of two worldwide fish invaders (Gambusia holbrooki and Gambusia affinis) 

    Srean, Pao (Date of defense: 2015-05-29)

    This thesis aims to contribute to the understanding of the invasive success of two invasive fishes (Gambusia affinis and G. holbrooki). We reviewed four Internet databases and the literature to clarify their introduction ...

    Variability in the health status and reproductive traits of European sardine stocks in the Mediterranean. Implications for fishery management 

    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 ...

    Where nitrite respiration meets electrotrophy: diversity studies and functional characterization of autotrophic bacterial isolates from bioelectrochemical system 

    Vilar Sanz, Ariadna (Date of defense: 2016-02-05)

    Denitrifying biocathodes are used to treat nitrogen contaminated water resources. The present PhD dissertation have been characterized different bacterial families with a relevant role in denitrification process. Different ...