Ara mostrant els elements 1-10 de 43
Arizmendi Mejía, Rosana (Data de defensa: 2015-11-25)
Climate change, along with other anthropogenic pressures (e.g. water pollution, overfishing and habitat degradation), is severely impacting oceans around the world, producing important changes in its ...
Castro Català, Núria de (Data de defensa: 2016-02-05)
Aquatic systems are under pressure from multiple stressors that affect the structure, the functioning, and the health of species, communities and ecosystems. One of the main human pressures affecting ...
Mendoza Barberá, Guillermo de (Data de defensa: 2013-06-20)
“Lake macroinvertebrates and the altitudinal gradient in the Pyrenees [Los macroinvertebrados lacustres y el gradiente altitudinal en los Pirineos]” is a thesis about freshwater macroinvertebrate ...
Varas Schiavi, Manuel (Data de defensa: 2012-06-01)
El delta del Ebro es uno de los más importantes de la Península Ibérica y del Mediterráneo. La bahía El Fangar, foco de este estudio, mide unos 12Km2, con valores de profundidad que varían entre los 0 ...
Gera, Alessandro (Data de defensa: 2013-06-21)
Overall, this thesis is an attempt at approaching seagrass ecosystems from a landscape perspective, with the aim of increasing knowledge about the processes generating patterns at large spatial scales, ...
Sperlich, Dominik (Data 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 ...
Caraballo López, Tatiana (Data 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 (Data 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 ...
Ribot Bermejo, Miquel (Data 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 (Data 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 ...