Now showing items 122-141 of 174

    New contributions to the ecology of gelatinous zooplankton in the Western Mediterranean: abundance, distribution and diversity 

    Pastor Prieto, Marina (Date of defense: 2023-03-10)

    [eng] Gelatinous zooplankton has been studied in the Western Mediterranean for a long time, however, its spatial structure has been mainly addressed in coastal areas, during spring and summer periods. Hence, information ...

    New insights into the ecology and conservation of bryozoans: from global diversity patterns to the responses to anthropogenic stressors in the Mediterranean Sea = Noves aproximacions a l’ecologia i conservació dels briozous: des dels patrons globals de diversitat fins les respostes als impactes humans al Mar Mediterrani 

    Pagès Escolà, Marta (Date of defense: 2019-12-09)

    Marine ecosystems are directly threatened by multiple and interactive human stressors at global and local scales. Hence, it is vital to study biodiversity and ecological patterns through a multi-disciplinary approach, from ...

    Nutrients and algal growth in the oligotrophy: a field experimental approach in mountain lakes = Nutrients i creixement algal en la oligotròfia: una aproximació experimental de camp en estanys de muntanya 

    Giménez Grau, Pau (Date of defense: 2016-11-04)

    The main objectives of this dissertation were (a) to determine the effects of nitrogen (N) and phosphorus (P) fertilization on the growth of microalgal groups of periphyton and phytoplankton, and (b) to evaluate some ...

    Ononido-Rosmarinetea Br.-Bl. 1947, anàlisi numèrica i implicacions sintaxonòmiques 

    Buxalleu Serras, Carme (Date of defense: 2023-03-17)

    [cat] Atenent als fets de que la classificació europea s’ha desenvolupat, principalment, dins les fronteres de cadascun dels països portant a notables diferències dels corresponents tipus de vegetació -fins i tot entre ...

    Patrones de comportamiento y perfiles de personalidad en el delfín mular (Tursiops truncatus), y su utilidad como herramienta de manejo en cautividad 

    Quirós Garzón, Carolina (Date of defense: 2023-10-18)

    [spa] El objetivo general de esta tesis ha sido estudiar el comportamiento solitario y social de un grupo de ocho delfines mulares (Tursiops truncatus) en cautividad (Zoo de Barcelona), durante dos periodos reproductivos, ...

    Pelagic calcite precipitation in lakes: from a global to a local perspective on its drivers and implications 

    Khan, Hares (Date of defense: 2021-09-16)

    Inland waters are relevant components of the global carbon cycle acting as hot spots for biogeochemical processes by which carbon is stored, transformed, and outgassed to the atmosphere. Therefore, less than half of the ...

    Plant physiology and biotechnology for the study and improvement of Mediterranean japonica rice varieties 

    Ferreres Contreras, Irene (Date of defense: 2020-06-26)

    Rice belongs to the Poaceae family and Oryza genus. The genus Oryza comprehends 24 species, being 22 wild and 2 cultivated. These two cultivated species correspond to Oryza sativa, originated in Asia, nowadays cultivated ...

    Population Models: Flexibility, Advances, and Applications to Wildlife Conservation. The Bonelli’s Eagle as a Study Case 

    Badia Boher, Jaume Adrià (Date of defense: 2023-09-15)

    [eng] In this thesis, we took advantage of recent advances in the degree of sophistication and flexibility of population models to study the population dynamics and conservation of long-lived species. As main objective, ...

    Pre-dispersal seed predation by weevils (Curculio spp.): The role of host-specificity, resource availability and environmental factors 

    Arias-LeClaire, Harold (Date of defense: 2018-11-21)

    Pre-dispersal seed predation (PDSP, hereafter) significantly reduces plant reproductive output. The negative effects on plant fitness have triggered the development of different strategies to protect the seeds and/or reduce ...

    Problemàtica i conservació de tortugues aquàtiques continentals a l'Europa occidental: el cas de la tortuga de rierol, Mauremys leprosa (Schweigger 1812), al nord-est de la Península Ibèrica 

    Franch Quintana, Marc (Date of defense: 2016-11-04)

    La tortuga de rierol (Mauremys leprosa) és una espècie de tortuga aquàtica continental que es distribueix pel nord d’Àfrica, la Península Ibèrica i una petita part del sud de França. Aquesta distribució coincideix amb una ...

    Processing of organic matter in a Mediterranean river network : heterogeneity under water flow variability = Processament de la matèria orgànica en una xarxa fluvial mediterrània : heterogeneïtat sota la variabilitat hidrològica 

    Abril Cuevas, Meritxell (Date of defense: 2017-05-03)

    Nowadays, it is recognized that freshwater ecosystems can process a substantial part of the terrestrial organic matter they transport, thereby contributing significantly to global C fluxes. However, the mechanisms behind ...

    Protozous en sistemes avançats de tractament d'aigües residuals: caracterització de les poblacions i cerca de les espècies bioindicadores 

    Canals Delgado, Oriol (Date of defense: 2017-09-08)

    La present tesi té com a objectiu l’estudi de la comunitat microeucariota que es desenvolupa en dos sistemes avançats de tractament d’aigües residuals amb alta càrrega amoniacal. La comunitat microeucariota, especialment ...

    Reconciling standardised inventories and DNA barcoding to infer diversity patterns in Iberian spider communities 

    Domènech Andreu, Marc (Date of defense: 2021-10-29)

    Unveiling the patterns and identifying the factors that drive community assembly are key questions in ecology and evolution, especially in the current state of climate change and biodiversity loss. Because of its particular ...

    Regulació hormonal i redox de processos de senescència d'òrgans 

    Miret Barrio, Javier Alberto (Date of defense: 2017-05-25)

    El malbaratament dels productes frescos suposa la pèrdua de fins a un 45% dels fruits i vegetals. El canvi global i el previst increment de la freqüència de fenòmens meteorològics extrems representaran una major pressió a ...

    Regulación hormonal del crecimiento, maduración y sobremaduración en un modelo de fruto no climatérico: Prunus avium L var. Pime Giant 

    Tijero Esteve, Verónica (Date of defense: 2019-10-10)

    Las cerezas (Prunus avium L.) son frutos muy apreciados por el consumidor, alrededor del mundo, debido a sus características visuales y organolépticas. Como un fruto carnoso con hueso no climatérico, los cambios bioquímicos ...

    Resilience of Long-lived Mediterranean Gorgonians in a Changing World: Insights from Life History Theory and Quantitative Ecology 

    Montero Serra, Ignasi (Date of defense: 2018-06-07)

    Temperate benthic communities face cumulative impacts from multiple stressors acting both at local and global scales. Understanding how local management and ocean warming affect the dynamics and resilience of dominant ...

    The response of Mediterranean coralligenous assemblages to climate change: an integrated, long-term view from species and populations to the ecosystem level 

    Gómez Gras, Daniel (Date of defense: 2021-04-23)

    Climate change has emerged as one of the greatest and most pervasive threats that our natural heritage will have to face in the coming decades. Together with other anthropogenic pressures such as pollution, overfishing or ...

    Responses of Mediterranean riparian forests to water availability: Insights of present and future conditions. A case study in La Tordera catchment = Respostes dels boscos de ribera mediterranis a la disponibilitat d'aigua: estudi de les condicions presents i futures a la conca de Tordera 

    Poblador Ibáñez, Sílvia (Date of defense: 2018-07-10)

    During the last decades, most of the studies based on climate change effects on vegetation physiology have focused on upland forests and species at their border of distribution, since, in both conditions, species are highly ...

    Respuestas de los primates a demandas sociales y ecológicas: La importancia de los métodos no invasivos 

    Flores Escobar, Elizabeth (Date of defense: 2020-01-10)

    Las selvas tropicales mexicanas resguardan la distribución más septentrional de los platirrinos en el Neotrópico, representada por tres especies: el mono aullador de manto (Alouatta palliata), el mono aullador negro (Alouatta ...

    Restauración de bosques de Pinus halepensis mediante la introducción de especies rebrotadoras para aumentar su resiliencia ante incendios forestales 

    Granados García, Maria Elena (Date of defense: 2019-12-18)

    Los ecosistemas de la Cuenca Mediterránea han experimentado a lo largo de tiempos ancestrales fuertes y prolongados procesos de degradación, por lo que desde el último tercio del siglo XIX se han realizado forestaciones ...