Now showing items 125-144 of 181
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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, ...
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 ...
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 ...
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, ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...