Arizmendi Mejía, Rosana (Date of defense: 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 ...
Pueyo Puntí, Salvador (Date of defense: 2003-03-25)
This work is the result of a search for general (or nearly general) regularities at ecosystem level, and an exploration of their practical relevance in our relations with the environment.<br/>I began ...
Peso Fernández, Marcos (Date of defense: 2018-12-14)
The Pyrenean frog (Rana pyrenaica) is a Pyrenees endemic species, mostly distributed between Navarra and Aragón, and recently was described in few streams of France. The typical habitat of the species ...
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 ...
Rizzo, Valeria (Date of defense: 2015-10-08)
The general aim of this dissertation is to investigate the evolution, the diversification and some ecological traits of the species of the strictly subterranean genus Troglocharinus Reitter, 1908. ...
Canals Merseburger, Mª Goretti (Date of defense: 2006-04-24)
A full understanding of nutrient cycling in lotic ecosystems is crucial given the increasing influence of human activities on the eutrophication of streams and rivers. However, existing knowledge about ...
Castro Català, Núria de (Date of defense: 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 ...
Siqueira Campos, Felipe (Date of defense: 2018-06-18)
Biodiversity patterns are results of ecological and evolutionary processes. Understanding the forces shaping biodiversity patterns help to predict the responses of ecosystems to environmental change. ...
Rivera Rondón, Carlos Alberto (Date of defense: 2014-02-20)
Lakes are ecosystems exposed to the combined influence of climate and catchment processes. Lakes collect and archive evidence of these forcings in their sediments through of a complex interaction with ...
Mendoza Barberá, Guillermo de (Date of defense: 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 ...