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Showing 10 out of a total of 44 results for collection: Departament d'Ecologia. (0.996 seconds)

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Flora and vegetation of the Guayana highlands : past dynamics, global warming and conservation guidelines = Flora i vegetació de les Terres de Guayana : dinàmica del passat, escalfament global i directrius de conservació

Safont Crespo, Elisabet (Date of defense: 09-02-2016)
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 emphasis is put on ...
Fish as local stressors of Pyrenean high mountain lakes: Arrival process and impact on amphibians and other organisms

Miró Pastó, Alexandre (Date of defense: 08-01-2016)
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 introductions to such ...
Trophic ecology of small pelagic fish in the northwestern Mediterranean / Ecología trófica de peces pelágicos pequeños en el Mediterráneo noroccidental

Costalago Meruelo, David (Date of defense: 10-12-2012)
In the northwestern Mediterranean anchovy and sardine are among the most ecologically and economically important species. Both species are planktivorous during all their life stages, which could alledgedly lead to expect ...
Lake macroinvertebrates and the altitudinal gradient in the Pyrenees / Los macroinvertebrados lacustres y el gradiente altitudinal en los Pirineos

Mendoza Barberá, Guillermo de (Date of defense: 20-06-2013)
“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 communities inhabitting ...
Landscape fragmentation and resilience in seagrass meadows / Fragmentación del paisaje y resiliencia en praderas de fanerógamas marinas

Gera, Alessandro (Date of defense: 21-06-2013)
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, and understanding ...
Biology and population ecology of uncultured Archaea in natural environments analyzed by taxon-specific molecular markers = Biología y ecología poblacional de Archaeas no cultivadas en ambientes naturales analizadas mediante marcadores moleculares específicos

Restrepo Ortiz, Claudia Ximena (Date of defense: 05-02-2016)
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 designed specific primers ...
Relationships between streamwater nitrogen and primary uptake compartments: an isotopic approach

Pastor Oliveras, Ada (Date of defense: 13-06-2014)
The overarching goal of this dissertation was to explore relationships between streamwater nitrogen (N) and the most representative primary uptake compartments (PUCs) in stream ecosystems (e.g. microbial biofilm, algae, ...
Conservation of marine habitat-forming species under climate change: population genetics and demographic responses of the Mediterranean red gorgonian Paramuricea clavata.

Arizmendi Mejía, Rosana (Date of defense: 25-11-2015)
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 physical and biological ...
Estructura y distribución de la comunidad íctica acompañante en la pesca del camarón (Golfo de Tehuantepec. Pacífico Oriental, México)

Martínez-Muñoz, Marco A. (Date of defense: 06-06-2012)
En la presente investigación, se estudió la estructura espacial de las asociaciones de peces demersales que forman parte de la captura incidental de la pesca de camarón, en el ecosistema costero del Golfo de Tehuantepec, ...
Microbial Macroecology understanding microbial community pattems using phylogenetic and multivariate statistical tools

Barberán Torrents, Albert (Date of defense: 07-09-2012)
El estudio de los microorganismos en cultivo puro ha propiciado el desarrollo de la genética, la bioquímica y la biotecnología. Sin embargo, la ecología ha permanecido reticente a incorporar a los microorganismos en su ...