Programa de Doctorat en Ciències del Mar: Enviaments recents
Ara mostrant els elements 61-80 de 129
The use of integrative approaches to characterize new mechanisms of toxicity of pollutants in the aquatic environment
Anthropogenic pollution represents a major concern for aquatic ecosystem, which has been affected by a complex cocktail of heterogeneous compounds that may provoke significant toxic effects to the living organisms. Among ...
Natural and anthropogenic control of water quality of an Amazon estuary : the Caeté estuary (Brazil)
In the Amazon region, few data are available on the impacts caused by the urban settlements found in the proximity of estuaries. In the estuary of the Caeté River, the focus of the present study, the nutrient input is ...
Saharan dust deposition effects on production in the Mediterranean Sea
The potential capacity of fertilization of surface oceans by atmospheric deposition is of scientific interest. This is especially true in the oligotrophic Mediterranean Sea. Its surface waters are extremely poor in nutrients ...
Ecological study of benthic communities in the continental shelf and upper slope in the Menorca Channel (North Western Mediterranean)
Technological development and increased availability of remotely operated vehicles and manned submersibles have significantly increased accessibility to deep environments revealing the presence of rich and diverse macrobenthic ...
Biology, ecology and ecophysiology of the box jellyfish Carybdea marsupialis (Cnidaria: Cubozoa) = Biologia, ecologia i ecofisiologia de la cubomedusa Carybdea marsupialis (Cnidaria: Cubozoa)
Over the last years, the sightings of the cubomedusa Carybdea marsupialis have increased in the Mediterranean Sea and this has been linked to an increase in its abundance. Consequently, this phD thesis addresses some ...
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 ...
