Mostrando ítems 11-20 de 79
Sperlich, Dominik (Fecha de defensa: 2015-07-24)
The Mediterranean Basin is a climate-change hotspot of the world. Predicted reductions in annual precipitation, increases in mean temperature, and increases in the variability and occurrence of extreme ...
Catalán Alemany, Ignacio (Fecha de defensa: 2003-05-30)
The high variability in the recruitment of marine fishes is probably explained by small fluctuations in the mortality rates of early developmental stages. A popular proxy for the potential mortality of ...
Soares Cunha, Eugenio Marco (Fecha de defensa: 2005-03-11)
O<br/><br/>A análise da evolução costeira recente da região de Natal (Estado do Rio Grande do Norte - Brasil) é delineada nesta tese de doutorado que tem como objetivo primeiro fornecer subsídios à ...
Caraballo López, Tatiana (Fecha de defensa: 2013-12-13)
Phytoplankton embraces a large diversity of life forms, from pioneer oxygenic photosynthetic cyanobacteria to a broad spectrum of phylogenetically distant eukaryotic organisms. In many of the evolutionary ...
Miró Pastó, Alexandre (Fecha de defensa: 2016-01-08)
Pyrenean high mountain lakes are naturally fishless due to natural barriers that have prevented the natural colonisation of fish species from lower streams. However, there have been numerous trout ...
Prado Villegas, Patricia (Fecha de defensa: 2007-02-23)
La revaluació a gran escala espacial (> de 300 Km) i mitjançant mètodes de quantificació directa, del impacte de l'herbivorisme en els ecosistemes de <i>Posidonia oceanica</i> va revelar pèrdues de ...
Ribot Bermejo, Miquel (Fecha de defensa: 2015-03-27)
Human activities have increased dissolved inorganic nitrogen (DIN) availability and modified the relative proportion of DIN as NO3- or NH4+ in running waters. Because nitrogen (N) is an essential element ...
Muñoz Camarillo, Gloria (Fecha de defensa: 2013-04-05)
El mejillón cebra, Dreissena polymorpha (Pallas, 1771), es conocido por ser una de las especies invasoras de agua dulce más dañinas, tanto desde el punto de vista ecológico como económico, a nivel ...
Reguera Ramírez, Beatriz (Fecha de defensa: 2003-07-02)
Los dinoflagelados del género <i>Dinophysis</i> producen potentes toxinas lipofílicas que se transmiten a través de los bivalvos filtradores a niveles superiores de la red trófica, y los convierten en ...
Andreu Hayles, Laia (Fecha de defensa: 2007-10-25)
Two main purposes divided this Thesis into two parts, taking into account that the need of understanding current climatic fluctuations is still an important request of population living in the 21st ...