Mostrando ítems 21-30 de 44
Restrepo Ortiz, Claudia Ximena (Fecha de defensa: 2016-02-05)
The annual dynamics of three different ammonia-oxidizing archaea (AOA) ecotypes (amoA gene) and of the SAGMCG-1 (Nitrosotalea-like aquatic Thaumarchaeota) group (16S rRNA gene) were studied by newly ...
Peipoch Güell, Marc (Fecha de defensa: 2014-06-25)
The main goal of this thesis is to investigate how (15)N natural abundances can help understanding the role of different primary uptake compartments (i.e., biofilm, filamentous algae, bryophytes, ...
Tomlinson, Benjamin John (Fecha de defensa: 2016-01-20)
The Systems Approach Framework (SAF) is a methodological framework designed to enhance the efficacy of human decision-making processes within social-ecological systems with regard to sustainability. The ...
Ballen Segura, Miguel Angel (Fecha de defensa: 2012-09-14)
El comportamiento fagotrófico en especies fitoplanctónicas fue evaluado por medio de técnicas de análisis celular que permiten establecer patrones individuales de cada una de ellas. Primeramente, se ...
Kersting, Diego K. (Fecha de defensa: 2014-02-07)
Marine ecosystems are declining worldwide threatened by an increasing number of stressors. Global change-related disturbances have highlighted the need of new complementary conservation measures; for ...
Guallar Morillo, Carles (Fecha de defensa: 2013-05-24)
En la costa catalana s’ha observat la presència d’unes capes d’aigua properes al fons riques en clorofil•la a (HCNBL, de l’anglès High Chlorophyll Near Bottom Layer). Aquestes estructures productives ...
Rodríguez Climent, Sílvia (Fecha de defensa: 2014-12-05)
The Ebro Delta represents the most important wetland area in Catalonia, the second most important in Spain (after Doñana National Park) and one of the most important estuarine zones in Europe. Although ...
Rovira Torres, Laia (Fecha de defensa: 2013-11-21)
The general aim of the thesis was to improve knowledge of the ecology and taxonomy of estuarine benthic diatoms in a highly stratified Mediterranean estuary, in order to evaluate their potential use as ...
Safont Crespo, Elisabet (Fecha de defensa: 2016-02-09)
This thesis is aimed at the study of the flora and vegetation of the Guayana Highlands (GH), a set of -50 table mountains (called tepuis) located in the Guayana Shield of northern South America. Special ...
Sanpera Calbet, Isis (Fecha de defensa: 2014-04-11)
Streams are complex and highly diverse ecosystems. Within the stream network, headwater streams (1st to 3rd order) are highly important. Headwaters represent most of the total length, influence the ...