Trobajo Pujadas, Rosa (Date of defense: 2003-11-06)
S'han estudiat els efectes dels factors ambientals sobre el perífiton dels sistemes lenític fluctuants del aiguamolls de l'Empordà. L'estudi s'ha realitzat als tres nivells d'integració: nivell d'ecosistema ...
Ferrer Maza, Dolors (Date of defense: 2016-02-05)
This PhD thesis evaluates the links between parasitism, condition and reproduction of mature female individuals of three of the most captured fish species in the western Mediterranean Sea: European hake, ...
Quintana Pou, Xavier (Date of defense: 1995-10-10)
In this study the principal disturbance factors of the Empordà saltmarsh and their influence on water composition, and on plankton community structure and composition are analyzed. The importance of the ...
Brucet Balmaña, Sandra (Date of defense: 2003-11-04)
Zooplankton community structure (composition, diversity, dynamics and trophic relationships) of Mediterranian marshes, has been analysed by means of a size based approach. <br/>In temporary basins the ...
Barral Fraga, Laura (Date of defense: 2017-10-26)
Based on the current knowledge about biofilm ecotoxicology and arsenic biogeochemistry in freshwater ecosystems, this thesis studied, under realistic environmental concentrations, i) the role of benthic ...
Cefalì, Maria Elena (Date of defense: 2019-03-07)
According to the Habitats Directive (92/43/ECC) a habitat is defined as “the terrestrial or aquatic area, whether entirely natural or semi-natural, differentiated by its geographical, biotic and abiotic ...
Boy Roura, Mercè (Date of defense: 2013-10-04)
Nitrate groundwater pollution in the Osona region is a persistent and widespread problem. Nitrate concentrations are commonly above the drinking water threshold of 50 mg/L in wells and springs. ANOVA ...
Merciai, Roberto (Date of defense: 2016-09-30)
L'objectiu d'aquesta tesi és de'explorar alguns aspectes de l'impacte humà sobre les poblacions de peixos i altres components dels ecosistemes fluvials Mediterranis de Catalunya. Es va mostrar com els ...
Gionchetta, Giulia (Date of defense: 2019-10-25)
Hydrological drought is a process of natural desiccation mainly due to large shortage of rainfall events. Reduced precipitations and prolonged droughts are spreading worldwide and threaten the integrity ...
Blancafort Pujols, Xavier (Date of defense: 2005-12-02)
Les inflorescències on és present la formiga argentina reben menys visitants, a les zones envaïdes, a més, desapareixen la majoria d'espècies de formigues autòctones, algunes de les quals podrien ser ...