Now showing items 1-20 of 186
Crespo, Luís Carlos da Fonseca (Date of defense: 2021-11-26)
Dysdera and Hogna are the most speciose spider genera of the Madeira archipelago. I have extensively revised their taxonomy, describing a total of eleven new species, establishing five synonyms and revalidating one name, ...
Gracia Romero, Adrián (Date of defense: 2021-06-17)
Supplying sufficient food to an increasing population is one of the most important challenges over the next century. To meet this demand, crop productivity will need to increase while it is being threatened by climate ...
Hernández Fresno, David (Date of defense: 2024-03-08)
[eng] Plants are not isolated organisms; instead, they constantly interact with the microorganisms in their environment, forming a holobiont that consists of the plants themselves and their entire microbiome. This holobiont ...
Pladevall Izard, Eulàlia (Date of defense: 2022-06-16)
Multiple processes determine the structure and diversity of plant communities. The study of these processes, the community assembly rules, is a central part of the study of terrestrial ecology in the recent decades. In the ...
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 ...
San Sebastián Mendoza, Olatz (Date of defense: 2016-11-02)
Las Especies Exóticas Invasoras siguen tres fases: introducción, establecimiento y expansión, siendo pocas las que consiguen llegar a la última fase con éxito. Son muchos los factores que explican su éxito en el área ...
Molina Villamar, John Enrique (Date of defense: 2020-12-17)
Al analizar los servicios ecosistémicos ecuatorianas del “Programa Nacional de Reforestación con fines de conservación ambiental, protección de cuencas hidrográficas y beneficios alternos (PNR)” mediante la adaptación ...
Moles, Juan (Date of defense: 2016-09-23)
This thesis covers three important aspects of Antarctic heterobranchs: ecology, taxonomy, and systematics. The first section deals with ecological interactions of several nudibranchs. In Chapter 1, we chemically characterize ...
Espinoza Vaca, Jorge Santiago (Date of defense: 2024-03-04)
[spa] El suelo, un recurso no renovable y esencial para el desarrollo de la vida, se ve afectado por los sistemas de producción de cultivos que provocan su degradación. El biocarbón, un producto rico en carbono obtenido ...
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 ...
Lapuente Pérez, Joaquin de (Date of defense: 2019-11-07)
La entrada en el medioambiente de xenobióticos, procedentes de la actividad humana, que son biológicamente activos y de difícil eliminación, representa un grado de estrés que, a menudo, resulta inaceptable por los organismos ...
Reina Rodríguez, Guillermo A. (Date of defense: 2016-10-04)
La riqueza de orquídeas en Colombia alcanza una cifra de 4.270 especies, sin embargo, nuevos hallazgos sugieren no haber llegado a un punto de inflexión. La condición epífita en el 69% de sus especies y su ubicación en el ...
Villero Pi, Daniel (Date of defense: 2016-10-21)
This work is at the crossroads where conservation problems, arising from the biodiversity loss and environmental crisis, meet the difficulties of applying research outcomes in conservation practice, framed in a sustained ...
Cortés Serra, Verònica (Date of defense: 2018-02-05)
La mortalitat per captura accidental en les pesqueres de palangre representa una de les principals amenaces per a nombroses espècies d’ocells marins a nivell mundial. En el Mediterrani, aquesta mortalitat esta afectant ...
Lazzari, Natali (Date of defense: 2021-01-18)
The alarming rate of marine biodiversity loss calls for new strategies of understanding and accounting for human-nature relationships. Anthropogenic impacts are the main drivers of changes in coastal and marine systems ...
Sanmartí Boixeda, Neus (Date of defense: 2020-12-18)
Our world is subjected to a panoply of drivers of change. In this context, the understanding on how our biosphere resists, absorbs or is altered by the changes, appears as a hot question in ecology. In this respect, two ...
Pujol Buxó, Eudald (Date of defense: 2017-09-15)
The rates at which allochthonous species are introduced and become invasive worldwide are unprecedented and accordingly, the number of studies on invasion biology have increased during the past years. However, biological ...
Castro Quintas, Águeda (Date of defense: 2024-02-26)
[eng] During critical periods of development, psychosocial stress experiences may alter key neural networks of the human brain, with long-lasting effects on behavior and mental health. However, the specific biological ...
Siles Suárez, Laura (Date of defense: 2017-05-23)
En aquesta tesi doctoral s’ha estudiat la distribució, acumulació, funció i biosíntesi dels tocoferols i tocotrienols (vitamina E) en llavors, així com els seus mecanismes de control. En primer lloc es van estudiar les ...
Zenteno Devaud, Lisette (Date of defense: 2016-07-18)
Los depredadores marinos pueden cambiar su dieta a través del tiempo como consecuencia de cambios antropogénicos y naturales, por lo que un punto de referencia histórico aporta información básica y necesaria para comprender ...