Now showing items 111-130 of 174

    Macroalgal forests ecology, long-term monitoring, and conservation in a Mediterranean Marine Protected Area 

    Medrano Cuevas, Alba (Date of defense: 2020-02-21)

    All marine ecosystems in the Mediterranean Sea are highly threatened by anthropogenic stressors that can alter their structure and function, especially in rocky shores. Moreover, extreme climate events are becoming more ...

    Macroevolutionary patterns of habitat transitions in aquatic Coleoptera 

    Villastrigo Carbajo, Adrián (Date of defense: 2019-09-27)

    Understanding the evolutionary processes underlying extant biodiversity may help us to comprehend why species richness is not equally distributed between clades. One of the main causes to explain the disparity of species ...

    Mecanismos de protección frente al déficit hídrico reiterado en plantas 

    Fleta Soriano, Eva (Date of defense: 2017-06-07)

    En esta tesis doctoral se estudian los mecanismos que las plantas pueden disponer para hacer frente al déficit hídrico reiterado, ya que en la naturaleza los ciclos repetidos de estrés son mucho más frecuentes que un solo ...

    Mestizaje genético en las poblaciones humanas de Argentina 

    Resano Fantino, Magdalena (Date of defense: 2018-10-25)

    El objetivo principal de esta tesis es hacer un estudio completo del mestizaje genético de Argentina. Se pretende valorar la distribución territorial y regional del mestizaje y contrastarla con la información histórica y ...

    Modelización biomecánica de la locomoción bípeda en humanos y homininos 

    Saborit González, Gerard (Date of defense: 2019-07-10)

    La locomoción bípeda humana es un importante hito evolutivo. Los humanos aprendemos a caminar a temprana edad, aunque no por ello los procesos mecánicos involucrados son simples. Fuerzas y energía deben sincronizarse creando ...

    Modern-analog studies and high-resolution paleoenvironmental reconstruction of the last 500 years using the varved sediments of the Mediterranean Lake Montcortès (Central Pyrenees) 

    Trapote Forné, Mari Carmen (Date of defense: 2019-09-16)

    Varved lake sediments also known as annually laminated sediments, are natural paleoenvironmental archives containing high-resolution proxy data and precise chronologies. They are one of the few natural archives that can ...

    Movement ecology in pelagic seabirds 

    Zajková, Zuzana (Date of defense: 2020-01-20)

    Movement is a fundamental component of behaviour and thus both are inextricably linked. Variation in movement patterns usually reflects different behaviours, including those most glaring, such as foraging, dispersal, ...

    Movement ecology of coastal fishes in a marine protected area: implications for management and conservation 

    Aspillaga Cuevas, Eneko (Date of defense: 2017-07-27)

    Animal movement is a key biological process for the maintenance of ecosystem services, and a major concern for the conservation of biodiversity. The aim of movement ecology is to understand the causes and consequences of ...

    Multi-colony approaches to study migratory and foraging strategies in pelagic seabirds 

    Morera Pujol, Virginia (Date of defense: 2020-01-17)

    Movement is a widespread characteristic in the animal kingdom —occurring at many spatiotemporal scales— with consequences at an individual, population, species, and even ecosystem level. It is a very diverse character, ...

    Multi-scale and multi-sensor remote sensing in international agricultural development 

    Buchaillot, Maria Luisa (Date of defense: 2023-02-10)

    [eng] Personal food security means that they have physical and economic access to sufficient, safe, and quality food. On the other hand, there are three main causes of food insecurity: 1. the high vulnerability of agriculture ...

    Multi-sensor remote sensing detection of biotic stress for crop phenotyping and management guidance 

    Hamdane, Yassine (Date of defense: 2023-09-14)

    [eng] The main driving force behind crop research is to ensure food security. Climate change, which affects most crops and increases the risk of disease and famine, is addressed in this notion. The Food and Agriculture ...

    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 ...