Now showing items 21-40 of 186

    Feasibility of organic rice cultivation in the Ebro Delta 

    Palma Guillén, Alfred (Date of defense: 2023-10-20)

    [eng] In the Mediterranean basins, rice is mainly cultivated in wetland protracted areas such as deltas and marshlands, where it is the prevailing crop due to the high soil salinity. This salinity is continuously increasing ...

    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 ...

    Root traits and stable isotopes as phenotyping approaches to enhance wheat adaptation to Mediterranean conditions 

    Rezzouk, Fatima Zahra (Date of defense: 2023-09-15)

    [eng] Wheat is a major staple food worldwide. Its cultural and economic importance is mainly highlighted in the Mediterranean region, among other regions of the world. However, wheat production is frequently challenged by ...

    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 ...

    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 ...

    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, ...

    Analysis of the impact of synaptic plasticity genes and Human Accelerated Regions on brain function and structure: from the healthy brain to schizophrenia 

    Guardiola Ripoll, Maria (Date of defense: 2023-07-26)

    [eng] Schizophrenia is a severe psychiatric disorder affecting around 24 million people worldwide. While we begin to disentangle the biological actors implicated in the origin of the disorder, the precise aetiological ...

    Impacto de la pesca y ecología trófica de los tiburones de talla media y grande en el Mediterráneo 

    Nuez Rodriguez, Ignasi (Date of defense: 2023-06-26)

    [spa] Los tiburones y en general los peces condrictios se encuentran entre los organismos más amenazados del planeta, siendo los efectos derivados de la interacción con actividades pesqueras, como la sobrepesca y la pesca ...

    Ecología bentónica antártica en un planeta medioambientalmente cambiante, estudio de algunas esponjas y moluscos = Antarctic benthic ecology in our environmentally changing planet, a study on some sponges and molluscs 

    De Castro-Fernández, Paula (Date of defense: 2023-05-12)

    [spa] Debido a las condiciones ambientales y características biológicas únicas de los ambientes marinos antárticos, los efectos del cambio climático pueden ser devastadores y pueden reflejar el posible futuro a gran escala ...

    Limnology of Tropical Mountain Lakes: Analysis of the hydromorphological, physical and biogeochemical variability of the Cajas Massif lake district 

    Mosquera Vintimilla, Pablo (Date of defense: 2023-04-19)

    [eng] High-mountain tropical lakes in the South American continent are located in the upper part of the Andes range in the equatorial zone (Venezuela, Colombia, Ecuador, Peru, and Bolivia), altitudinally, usually above the ...

    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 ...

    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 ...

    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 ...

    Flora al·lòctona vascular ocasional, naturalitzada i invasora al territori comprès per Catalunya, el País Valencià i les Illes Balears. El cas d'estudi del neòfit recent invasor Kalanchoe xhoughtonii 

    Gómez Bellver, Carlos Miguel (Date of defense: 2023-03-03)

    [cat] OBJECTIUS PRINCIPALS: Les invasions biològiques són la conseqüència principal d'activitats antròpiques que en el cas de les plantes corresponen a diverses causes, principalment: el transport de persones i mercaderies, ...

    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 ...

    Facing global change divers: how do Mediterranean butterflies respond? 

    Ubach Permanyer, Andreu (Date of defense: 2023-01-10)

    [eng] The current context of global change is causing many threats to biodiversity worldwide, and the profound and rapid transformations of the environment have led to a severe insect decline. Because of their sensitivity ...

    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 ...

    Aplicación de técnicas moleculares y químicas al estudio de la dieta, migración y estructura poblacional del rorcual común de Islandia 

    García Vernet, Raquel (Date of defense: 2022-05-06)

    El objetivo global de esta tesis es ampliar el conocimiento sobre la biología y ecología del rorcual común, con foco principal en la población de rorcual común de Islandia. Dadas las numerosas incógnitas que siguen existiendo ...

    Vitamina E: ubiqüitat tissular i relació amb els jasmonats, claus de la interacció entre la resposta a l'estrès abiòtic i biòtic en plantes 

    Casadesús Cabral, Andrea (Date of defense: 2022-09-19)

    Tots els organismes fotosintètics són capaços de sintetitzar vitamina E, la qual s’acumula de forma ubiqua en els teixits vegetals, tant en els fotosintètics com en els no fotosintètics. Mentre que la vitamina E és un ...

    Evaluación interdisciplinar de la presencia y distribución de las basuras marinas (macro-residuos flotantes, microplásticos y aditivos plásticos), y de sus impactos en vertebrados marinos 

    Garcia Garin, Odei (Date of defense: 2022-07-04)

    La basura marina está aumentando exponencialmente en los mares y océanos de todo el mundo. En los últimos años, se han reportado y documentado sus amenazas a la fauna marina y a los ecosistemas marinos en general. Por estas ...