Programa de Doctorat en Ciències del Mar: Enviaments recents
Ara mostrant els elements 61-80 de 124
Trophic cascade modelling in bathyal ecosystems
Different aspects of the bathyal ecosystem have been treated with the final aim to investigate trophic cascades driven by fishery (top-down control), a phenomenon that in bathyal systems has never been studied. This was ...
Spatio-temporal processes explaining salp aggregations in the Catalan Sea, Northwestern Mediterranean
Salps are marine pelagic tunicates that have evolved opportunistic skills to bloom under favorable conditions and persist during adverse periods. They experience population outbursts (blooms) which, combined with their ...
Tracing the dynamics of dissolved organic matter in marine systems exposed to natural and experimental perturbations
In the coming decades, global warming will affect the biogeochemical cycles evolution, particularly the carbon cycle. In this context, it is necessary to gain knowledge on the Earth natural mechanisms to relieve the ...
In situ direct study of filtration and respiration rate of Mediterranean sponges = Estudio in situ de la filtración y la respiración de esponjas mediterráneas
Sponges play important roles in the functioning of marine ecosystem in which they are abundant. These roles range from stabilizers of substrate, to acting as major link between benthic and pelagic realms by filtering large ...
High-resolution wave forecasting : the Catalan coast case : modelling, coupling and validation
It is widely known that wind and wave predictions in the nearshore are less precise for semi enclosed domains than in the open ocean. The Catalan coast is a clear example of this situation, with a wave climate controlled ...
The role of persistent organic pollutants on Prochlorococcus photosynthetic capability under the global change scenario
This thesis aims to assess the effects of the complex mixture of organic pollutants on the Prochlorococcus photosynthetic capability, in field, and at sublethal level, in the multifactorial context of the global change. ...
The structure and dynamics of complex microbe-host interaction networks
Microbes form intricate and intimate relationships with most animals and plants, many of which are crucial for host development, health and functioning. Microbe--host symbiotic associations are poorly explored in comparison ...
Daphnia magna bioassays to detect novel eco-toxicological effects of prioritary and emergent contaminants
There is increasing evidence that the presence of many emerging pollutants in aquatic ecosystems may have detrimental effects on aquatic biota. Of special concern are those emerging pollutants that may act as putative ...
Exploiting the multiscale synergy among ocean variables : application to the improvement of remote sensing salinity maps
Les imatges de teledetecció de la superfície oceànica proporcionen una vista sinòptica de la complexa geometria de la circulació oceànica, dominada per la variabilitat de mesoescala. Estructures com filaments i vòrtex són ...
Biological rhythms in the Norway lobster (Nephrops Norvegicus L.) : Ecological modulation and genetic basis = Ritmos biológicos en la cigala (Nephrops norvegicus L.) : modulación ecológica y bases genéticas
Nephrops norvegicus is an important fishery resource for Europe. Its rhythmic burrowing behavior is strictly related to catchability. Here I studied such behavior under laboratory conditions. I investigated the combined ...
Hydrodynamic response of a shallow and microtidal estuary : Alfacs Bay. From high to low frequency processes
Using both observations and modelling tools, it is investigated the main hydrodynamic response mechanisms of a microtidal and shallow bay in the Mediterranean Sea: Alfacs Bay. Main objectives are considered using differenttim ...
On the circulation of the North Atlantic shadow zone
Regions isolated from the wind-driven circulation are found in the eastern margins of the world's tropical oceans. The weak and stagnant circulation of these so-called “shadow zones”, in combination with the intense ...
The Northern Current and its interaction with the Blanes submarine canyon (NW Mediterranean Sea)
A high-resolution (~1.2km) 3D circulation model nested in one-way to a coarse-resolution (~4km) 3D regional model was used to examine the interaction between the Northern Current and the Blanes submarine canyon (~41°00’-41°46’N; ...
Feeding ecology and community streucture of mesopelagic fishes in the Western Mediterranean = Ecología trófica y estructura de la comunidad de peces mesopelágicos del Mediterráneo Occidental
En esta tesis doctoral se ha estudiado la relación de las poblaciones de peces mesopelágicos (Myctophiformes y Stomiiformes) con el medio pelágico, analizando el posible efecto de factores físicos y biológicos en su ecología ...
A bioeconomic analysis of the coastal fishery of Pernambuco State, North-eastern Brazil
Los conceptos bioeconómicos modernos invocan la importancia de definir los derechos de propiedad posibles de ser llevados a cabo dentro del contexto de gestión. La investigación pesquera debe considerar las expectativas ...
Water mass variability in the eastern South Pacific and the ventilation of the oxygen minimum zone
This dissertation aims at extending our knowledge of the ESP OMZ through two main approaches. The first approach is based on tracer analysis and inverse modeling techniques. Such techniques are applied to hydrographic ...
Ocean velocities as inferred from Argo floats: methodology and applications
The velocity fields inferred from the trajectories of Argo floats have proven to be a valuable tool for observing the major ocean currents. The velocity fields can be used to examine statistical properties at regional and ...
Coastal vulnerability to storms at different time scales: application to the Catalan coast
Storm-induced impacts are known to cause important economic and environmental damages to coastal systems worldwide. Consequently, the relevance of including hazards and vulnerability assessments in coastal policies has ...
The diversity of dinoflagellates belonging to the gymnodiniales from the catalan coast (NW Mediterranean Sea)
Dinoflagellates are one of the most abundant and diverse groups of microalgae. Many dinoflagellates are covered with cellulose plates, whereas others lack these plates and are hence referred to as athecate or unarmoured. ...
Distribution and partitioning of organic pollutants and effects in coastal birds
Coastal areas are very susceptible to contamination due to the interaction of marine and anthropogenic processes. Persistent Organic Pollutants (POPs) are organic compounds very resistent to photolysis and chemical and ...
