Ara mostrant els elements 28-47 de 75
Bou Manobens, Jordi (Data de defensa: 2019-04-11)
The sessile oak Quercus petraea is widespread in Central Europe. The populations in the NE Iberian Peninsula are at the southernmost limit of the species range, in the most Mediterranean-type conditions and at the xeric ...
Latorre Espeso, Dani (Data de defensa: 2019-10-17)
Phenotypic plasticity is the adaptive response of a genotype to presenting different types of phenotypes in response to environmental changes. These adaptive responses can contribute to a particular species being able to ...
Merciai, Roberto (Data de defensa: 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 peixos del Riu Llobregat ...
Ferrer Maza, Dolors (Data de defensa: 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, Merluccius merluccius; ...
Vergés Guirado, Alba (Data de defensa: 2002-03-07)
L'objectiu d'aquest treball ha estat l'estudi del gènere Kallymenia a la Península Ibèrica i a les<br/>Illes Balears, el qual es troba representat per les espècies següents: K. reniformis (Turner) J.<br/>Agardh, K. feldmannii ...
Mercadal i Corominas, Gabriel (Data de defensa: 2019-11-13)
The hay meadows in the Mediterranean region of Catalonia. Geobotanical characterisation, agri-environmental assessment, and study of the phytosociological relationships between hay meadows in Western Europe We locate ...
Gascón Garcia, Stéphanie (Data de defensa: 2003-12-12)
S'ha estudiat l'estructura i dinàmica del sistema bentònic de llacunes costaneres de la maresma dels aiguamolls de l'Empordà (NE de la península Ibèrica) i els factors que les determinen. Amb aquesta finalitat es van prendre ...
Abril, Sílvia (Data de defensa: 2008-04-18)
La present tesi intenta obtenir noves dades referents a la biologia i ecologia de la formiga argentina que poden arribar a ser cabdals per al disseny o millora de noves metodologies de control de l'expansió de la plaga en ...
Puig-Gironès, Roger (Data de defensa: 2016-12-22)
Wildfires are natural perturbations that affect the structure of the landscape and biodiversity. In the Mediterranean basin, wildfires occur especially in hot seasons. However, in recent years the number of fires with the ...
Sánchez, Noemí, 1976- (Data de defensa: 2006-05-30)
L'objectiu d'aquesta tesi doctoral ha estat estudiar a nivell taxonòmic i ecofisiològic les espècies de la família Faucheaceae (Rhodymeniales, Rhodophyta) presents a la península Ibèrica i a les illes Balears: Fauchea ...
Àvila Izquierdo, Núria (Data de defensa: 2017-05-26)
Autotrophic and heterotrophic microorganisms are two essential functional units in the microbial food web of aquatic ecosystems. They play a key role in nutrient cycling and carbon flow and influence the structure, composition ...
Jones Román, Gabriela (Data de defensa: 2012-06-11)
This study was conducted in burned and harvested areas of Catalonia. It was evaluated the effect of the granivorous in predispersive fruit removal of Smilax aspera and Quercus coccifera and postdispersive seed removal. ...
Mor Roy, Jordi-René (Data de defensa: 2019-09-19)
Mediterranean rivers are characterized by high hydrological variability and heterogeneity of habitats, placing themselves amongst arid and temperate climates, and are associated with high biological diversity. On the ...
Llanos Paez, Oriana Lucia (Data de defensa: 2024-02-07)
Non-perennial rivers and streams are defined as systems that cease to flow at some point in space and time along their course. These systems are widespread globally representing more than half of the global river network, ...
Quintana Pou, Xavier (Data de defensa: 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 turnover rate is ...
Bernal Montolio, Meritxell (Data de defensa: 2013-07-22)
Climatic models predict higher fluxes of UV-B radiation and a decrease in summer precipitation in the near future for the Mediterranean region. The UV radiation can be an oxidative stress factor for plants affecting their ...
Cano-Barbacil, Carlos (Data de defensa: 2022-11-18)
Fresh waters are among the most biodiverse ecosystems globally but, at the same time, also the most threatened. Serious threats to freshwater ecosystems are, for example, habitat alteration, invasive alien species and ...
Font Payeras, Toni (Data de defensa: 2014-05-13)
La pesca recreativa és una de les activitats turístiques més practicades a les zones costaneres arreu del món, implicant a un gran nombre de persones i per tant una pressió sobre els recursos gens menyspreable, especialment ...
Rubio Gracia, Francesc (Data de defensa: 2021-10-27)
This thesis aimed to assess the responses of stream biota to flow alterations, in terms of water velocity increments and reductions of discharge, and to metal pollution. The investigations performed encompassed (i) ...
Tuulaikhuu, Baigal-Amar (Data de defensa: 2016-06-10)
The main aims of this thesis are: i) to evaluate arsenic toxicity in two major, interacting components of the freshwater ecosystem, biofilm and fish, to provide information on environmentally realistic exposures and on ...