Now showing items 21-40 of 174

    Chrinomids as lake paleoenvironmental indicators: the role of present fauna to understand the past 

    Tarrats Sada, Pol (Date of defense: 2018-01-12)

    The study of past ecological changes is highly useful for understanding how ecosystems have responded to climate and human-induced disturbances. It is thus relevant in the context of climate change, as it allows several ...

    Computer-Aided Drug Design applied to marine drug discovery = Disseny de fàrmacs assistit per ordinador aplicat a la cerca de possibles fàrmacs marins 

    Llorach Parés, Laura (Date of defense: 2019-11-29)

    The potential of natural products in general, and marine natural products in particular, as pharmacological entities has been widely demonstrated in recent years. Marine benthic ecosystems contain an extraordinary range ...

    Consecuencias psicológicas y neurobiológicas del maltrato infantil: alteraciones neuroendocrinas en la regulación del estrés e implicaciones en la salud mental infantojuvenil 

    Marqués Feixa, Laia (Date of defense: 2022-06-03)

    El maltrato infantil es un fenómeno muy complejo que afecta de manera integral al individuo y se asocia con diferentes problemas de salud mental en la infancia, adolescencia y adultez. Aunque el estudio del trauma relacional ...

    Conservation Planning of the Endangered Pyrenean frog by integratingnatural history, landscape and population genomics under Global Changes Scenarios 

    Peso Fernández, Marcos (Date of defense: 2018-12-14)

    The Pyrenean frog (Rana pyrenaica) is a Pyrenees endemic species, mostly distributed between Navarra and Aragón, and recently was described in few streams of France. The typical habitat of the species is mountain streams. ...

    Contributions to the knowledge of marine heterobranch sea slugs (Mollusca: Gastropoda): Panama biodiversity and cryptic species 

    Córdoba González, Darío Eliecer (Date of defense: 2022-07-18)

    The biodiversity of a country is part of its natural wealth and the study of it is fundamental for a scientific researcher, such is the case of the Panamanian marine coasts in which there has not been an exhaustive taxonomic ...

    Control natural de la vespeta del castanyer a Catalunya "Dryocosmus kuriphilus" Yasumatsu (Hym., Cynipidae). Evolució de la plaga a les castanyedes catalanes i les seves repercussions sobre la comunitat d’espècies autòctones que conformen el complex parasitoide 

    Jara Chiquito, Juan Luis (Date of defense: 2023-01-13)

    [cat] La vespeta del castanyer, Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae) és una espècie cedidògena originària de l'est de la Xina, que ataca tots els arbres del gènere Castanea (Fagaceae) col·lectant-se per ...

    De l'ecologia del comportament a la demografia: lliçons per a la conservació del sisó comú (Tetrax tetrax) = From behavioral ecology to demography: lessons for the little Bustard (Tetrax tetrax) conservation 

    Cuscó Martinez, Francesc (Date of defense: 2019-01-11)

    La conservació de les espècies amenaçades requereix entendre els factors que determinen la selecció de l’hàbitat, la supervivència i la productivitat de les seves poblacions. Sota l’actual context d’intensificació agrícola, ...

    Denitrification in mountain lakes = Desnitrificación en lagos de montaña 

    Palacín Lizarbe, Carlos (Date of defense: 2019-07-30)

    The reservoir size and pathway rates of the nitrogen (N) cycle have been deeply modified by the human enhancement of N fixation, atmospheric emissions, and climate warming, doubling the reactive nitrogen (Nr) available in ...

    Desarrollo, estabilidad y eficacia de biofertilizantes para la mejora del cultivo de plantas de tomate y maíz 

    Navarro Arenas, Miriam (Date of defense: 2021-10-07)

    El aumento de la población mundial en las últimas décadas, junto con la disminución de las tierras cultivables, ha puesto de manifiesto la necesidad de aumentar la producción agrícola para satisfacer la creciente demanda ...

    Developing of new stress-tolerant rice varieties for the Mediterranean region 

    Ramos de Fuentes, Eduardo (Date of defense: 2018-09-28)

    Rice (Oryza sativa) is the most important crop for human direct consumption, but its yield and production are strongly affected by biotic and abiotic stresses. Rice is the most salt-sensitive cereal and in addition, salinity ...

    Development of doubled haploids, chromosome doubling and CRISPR/Cas9 techniques in melon for the next generation of breeding 

    Hooghvorst, Isidre (Date of defense: 2021-04-28)

    The general aim of this PhD thesis was to study, develop and apply different breeding techniques in melon species in order to produce new commercial cultivars. The three specific objectives of this thesis are: 1. To ...

    Diet composition and habitat use in red deer (Cervus elaphus) populations in the northeastern iberian peninsula: relations with phenotypic plasticity in dental roots, group ethology and stress hormones 

    Gort Esteve, Araceli (Date of defense: 2023-09-22)

    [eng] Deer populations are increasing in recent times. One of the main causes is the abandonment of agriculture and extensive livestock farming. This thesis focuses on expanding our knowledge about the biology of red deer ...

    Differential responses of historical cereal lines to water stress: phenotype and gene expression = Respuesta diferencial de líneas históricas de cereales frente al estrés hídrico: fenotipo y expresión genómica 

    Medina Canzio, Susan Mery (Date of defense: 2017-09-15)

    Los futuros cambios climáticos ocasionarán una subida de las temperaturas y déficit en la disponibilidad de agua para la agricultura así como mayor concentración de CO2 en la atmósfera, donde el estatus hídrico y el flujo ...

    Dinoflagel·lades potencialment nocives al NO de la Mediterrània amb especial atenció al gènere Alexandrium = Potencially harmful dinoflagellates in the NW Mediterranean coast, with a focus on the Alexandrium genus 

    Sampedro i Roig, Nagore (Date of defense: 2018-02-23)

    Les dinoflagel·lades són un dels grups majoritaris del fitoplàncton marí. Algunes espècies d’aquest grup produeixen proliferacions que causen diversos efectes no desitjats tant en l’ecosistema marí com a l’espècie humana. ...

    Dissolved organic matter fluctuations in an intermittent headwater stream: from storm oscillations to decadal hydrological changes = Fluctuacions de la matèria orgànica dissolta en un riu de capçalera intermitent : de crescudes a canvis hidrològics decennals 

    Guarch Ribot, Alba (Date of defense: 2017-07-24)

    Dissolved organic matter (DOM) is an important source of carbon for aquatic microorganisms and it regulates many biogeochemical processes. Therefore, changes in river DOM concentration and properties could notably affect ...

    Diversity, ecology and evolution of feather mites in seabirds = Diversidad, ecología y evolución de los ácaros de las plumas en aves marinas 

    Mihaela Stefan, Laura (Date of defense: 2016-12-12)

    Feather mites are among the most abundant and commonly occurring bird ectosymbionts. They live permanently on the host body, are adapted to inhabit well-defined host microhabitats and are found in almost all avian groups. ...

    Dugong-Seagrass Interactions in the Arabian Peninsula: Dugong Feeding Grounds as a Conservation Management Unit 

    Khamis, Abdulqader (Date of defense: 2023-10-24)

    [eng] The principal challenge of conserving marine megaherbivores is that they typically range over extensive areas that far exceed the spatial scales of conventional management, transcending protected areas, and often ...

    Ecological factors and diatom diversity at rivers of the iberian mediterranean river basins: macro-scale, meso-scale and micro-scale = Factores ecológicos y diversidad de diatomeas en los ríos de las cuencas hidrográficas del Mediterráneo ibérico: maro-escala, meso-escala y micro-escala 

    Burfeid Castellanos, Andrea Montserrat (Date of defense: 2018-09-20)

    Benthic diatoms, photoautotrophic, silicate plated, single-celled aquatic organisms dwelling on substrates, have been used in bioindication, since they are good indicators of ecological water state. In this thesis, we have ...

    Ecological restoration of cold-water corals on the Mediterranean continental shelf 

    ­­­­­­­­­­Montseny Cuscó, Maria (Date of defense: 2020-12-04)

    Cold-water coral (CWC) habitats dwell on continental shelves, slopes, canyons, seamounts, and ridge systems around the world’s oceans, from 50 m to depths up to 4000 m. CWC species provide heterogeneous habitats supporting ...

    The ecological significance of nutritional strategies in gypsum plant communities 

    Cera Rull, Andreu (Date of defense: 2021-10-06)

    Gypsophile species are edaphic endemics of gypsum soils, and they are considered specialists of this stressful substrate. Gypsum endemics from different families and regions of the world tend to show a unique leaf elemental ...