Now showing items 145-164 of 174

    Seagrass responses to climate change: effects of warming and the interaction with local stressors = Respuestas de las angiospermas marinas al cambio climático: efectos del calentamiento y la interacción con estresores locales 

    Ontoria Gómez, Yaiza (Date of defense: 2020-02-14)

    Coastal ecosystems are highly threatened worldwide by multiple anthropogenic stressors that act at a range of spatial scales, from local to the global, and adversely affect their ecological functions and associated ...

    Seed treatments for the protection of crops 

    Estévez Geffriaud, Virginia (Date of defense: 2021-02-03)

    This thesis focuses on the development and subsequent application of a seed treatment protocol using a phytosanitary product named T34 Biocontrol (Biocontrol Technologies S.L., Spain) containing the active ingredient ...

    Sexual segregation in spatial and feeding ecology of seabirds 

    Pereira de Felipe, Fernanda (Date of defense: 2020-01-15)

    Sexual Segregation (SS) is a phenomenon that occurs across a wide range of animal species, and that had been broadly categorized in spatial/habitat segregation and social segregation. SS of a given species is often related ...

    Silicon consumption by marine sponges: an empirical approach and its ecological implications 

    López Acosta, María (Date of defense: 2018-09-21)

    Silicon (Si), in its dissolved form of silicic acid (DSi), is a key nutrient in the ocean. The availability of such nutrient in marine ecosystems is regulated through its use by silica-secreting organisms, a variety of ...

    Snow avalanches in the Pyrenees: dendrochronological dating, dendrogeomorphological mapping and detection of past snow-avalanche seasons at a regional scale = Allaus de neu al Pirineu : datació dendrocronològica, cartografia dendrogeomorfològica i detecció d'allaus del passat a escala regional 

    Muntán Bordas, Elena (Date of defense: 2016-12-13)

    In recent decades, information about past snow avalanches in the Pyrenees is being acquired by searching in different sources. One of these sources are tree rings. In this Ph.D. thesis, dendrogeomorphological techniques ...

    Soil water availability regulates soil respiration temperature dependence in Mediterranean forests 

    Chang, Chao-Ting (Date of defense: 2017-07-07)

    The variations of ecosystem and soil respiration are mainly driven by temperature and precipitation, but the importance of temperature and precipitation could vary across temporal and spatial. At diurnal to annual temporal ...

    Spatial ecology and migration of Calonectris shearwaters: new insights from Spanish populations revealed by biologging 

    Reyes González, José Manuel de los (Date of defense: 2021-05-26)

    The revolution in biologging and satellite telemetry technologies in the last two decades has led to a new era in seabird research. This thesis brings new insights into the spatial ecology and migration of the Cory’s and ...

    Stopover ecology of migrant songbirds at the Ebro delta = Ecologia de parada migratòria de passeriformes al Delta de l'Ebre 

    Guerreiro Duarte Rivaes da Silva, Ana Sofia (Date of defense: 2018-12-14)

    Migration associated with movements between breeding and wintering areas allow animals to maximize fitness in response to seasonal changes in resources (Dingle 2014). Some of the most incredible migrations in the animal ...

    Structural and physiological mechanisms underlying abiotic stress tolerance in the Mediterranean shrub Cistus albudus L. 

    Pérez-Llorca, Marina (Date of defense: 2021-02-10)

    Mediterranean species have to be in constant acclimation to seasonal environmental changes, including variations in water availability, air temperature and solar radiation. Due to global warming, these environmental changes ...

    Systematics of Nearctic and Neotropical Oak Gall Wasps (Hymenoptera: Cynipidae: Cynipini), with a focus on specific genera in the fauna of Mexico 

    Cuesta Porta, Victor (Date of defense: 2023-11-13)

    [eng] The oak gall wasps (Hymenoptera: Cynipidae: Cynipini) are a group of specialized endophytophagous microhymenopterans that induce galls on Fagaceae trees, principally oaks (Quercus L.). The systematics of this tribe ...

    Taxonomic review of oak cynipid inquilines (Hymenoptera: Cynipidae), with special attention to the New World fauna and an approach to their global phylogeny 

    Lobato Vila, Irene (Date of defense: 2021-03-23)

    The oak cynipid inquilines (Hymenoptera: Cynipidae: Synergini, Ceroptresini) are a group of specialized endophytophagous microhymenopterans that develop inside galls induced mainly by other cynipids on Fagaceae trees, ...

    Taxonomical revision of subfamily Anacharitinae (Hymenoptera: Cynipoidea: Figitidae) 

    Mata Casanova, Noel (Date of defense: 2018-04-18)

    Superfamily Cynipoidea (Hymenoptera: Apocrita) includes two very different groups of organismes. Macrocynipoids is a paraphyletic group of parasitoids of wood-bearing beetle larvae, characterized by its big size, and with ...

    Testing the hypothesis of adaptive radiation and its eco-phenotypic implications 

    Bellvert Bantí, Adrià (Date of defense: 2023-11-02)

    [eng] Without a shadow of a doubt, adaptive radiation processes have played a major role in our current understanding of how species evolved on our planet. Since the original proposal of the theory of evolution by natural ...

    The bathyal connections between the Mediterranean Sea and the Northeastern Atlantic Ocean: An assessment using deep-water sponges as a case study 

    Sitjà Poch, Cèlia (Date of defense: 2020-11-05)

    The general outline of this thesis was to assess the potential of the Mediterranean water masses to transport deep-sea fauna towards the Atlantic Ocean. By examining the effects that the bathyal water mases moving from the ...

    The role of leaf litter quality and streambed hydro-morphology on in-stream leaf litter dynamics = El rol de la qualitat de la fullaraca i de la hidro-morfologia del tram fluvial en les dinàmiques de la fullaraca als rierols 

    Bastias Álamo, Elliot (Date of defense: 2018-04-11)

    Understanding the dynamics of leaf litter inputs in streams involves assessment of retention, spatial distribution and processing of leaf litter inputs. However, leaf litter dynamics in streams has been mostly studied by ...

    The role of non-native fish on littoral macroinvertebrates of Pyrenean high mountain lakes 

    Osorio Álvarez, Víctor (Date of defense: 2024-02-06)

    [eng] High mountain freshwater ecosystems, such as Pyrenean lakes, are distinguished by their unique ecological characteristics, which encompass their near-pristine undisturbed state, unique biodiversity, and their role ...

    Thermal adaptation of amphibians in tropical mountains: consequences of global warming = Adaptaciones térmicas de anfibios en montañas tropicales: consecuencias del calentamiento global = Adaptacions tèrmiques d’amfibis en muntanyes tropicals: conseqüències de l’escalfament global 

    Pintanel Costa, Pol (Date of defense: 2018-11-26)

    Temperature is likely to be one of the most important abiotic factors given how it affects the physiology of the whole organism and as a consequence, it has an essential role in ecology and evolution. However, how the ...

    Towards a more sustainable management of temporary rivers: tools for improving their conservation, biomonitoring and social recognition 

    Soria Extremera, Maria (Date of defense: 2021-05-07)

    Temporary rivers (TRs) are dynamic systems that typically shift between flowing, disconnected-pools and dry phases, and represent nearly 50% of the current global river network. Despite TRs support several unique and endemic ...

    Towards disentangling the genetic complexity and clinical heterogeneity of psychotic disorders: from family-based approaches to gene-environment studies 

    Soler Garcia, Jordi (Date of defense: 2021-07-13)

    Psychotic disorders are psychiatric conditions with a worldwide prevalence of around 4% and a tremendous personal, economic and social burden. As complex phenotypes, psychotic disorders are caused by multiple genetic ...

    Tracking historical changes in the trophic ecology of the green turtle "Chelonia mydas" in the Hawaiian Islands 

    Velasquez Vacca, Adriana (Date of defense: 2023-03-21)

    [eng] Hawaiian green turtles Chelonia mydas were heavily exploited for their fat, meat and eggs by the Polynesians in the pre-contact era and continued to be commercially exploited until 1978 when they were officially ...