Universitat de Barcelona
Now showing items 1-20 of 21
Overall, this thesis aims at approaching macrophyte herbivory and community ecology from a behavioural landscape perspective. Our study system, the seascape mosaic of Posidonia oceanica seagrass meadows interspersed with ...
[eng] Ecosystem biomonitoring is crucial for proper management of natural communities during the Anthropocene era. With the advent of new sequencing technologies, DNA metabarcoding has been proposed as a game-changing tool ...
Increasing anthropogenic pressures and its effects on marine ecosystems urge enhanced knowledge and understanding of the current state of marine biodiversity. This baseline information is pivotal to establish the actual ...
Macrophyte systems are globally vulnerable to overgrazing, often shifting precipitously to functionally poorer alternative stable states triggered by herbivore population outbreaks. Sea urchin herbivory can cause shifts ...
Population ecology is a scientific discipline primarily interested in the ecological processes that make the number of individuals in a population to change over space and time, and by focusing on populations as fundamental ...
Widespread species have traditionally received much less attention than rare and endemic ones. However, they are crucial in macroecological patterns and in ecosystem structure and functioning. Thus, understanding the ...
Shallow-water rocky ecosystems in temperate areas are dominated by macroalgae, whilst zooxanthellate corals are extremely rare. In an era of global change, sea warming plays a crucial role in the widespread phase shifts ...
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 internal processes. ...
The aim of this thesis was to explore the distribution of the taxonomic, phylogenetic and functional components of plant diversity in high mountains, and to show how different components of diversity have responded to ...
The overarching aim of my thesis was to assess the role of environmental variability and specially of perturbations in the population dynamics of social vertebrates. Our results emphasize the need to collect individual, ...
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. The genus Troglocharinus ...
Invasive species constitute a major threat to global biodiversity and cause important economic losses and ecological impacts. In the marine realm, ascidians include several aggressive invasive species, some of which have ...
El estudio se centra la filogenia, biología y ecología de la demosponja Hemimycale columella y su simbiosis con una bacteria calcificadora (calcibacteria). Posteriormente se incorporaron otras especies para entender tanto ...
This thesis analyzed the dynamics of tree radial growth at different time-scales in relation to climate and drought in two tropical dry forests (TDFs) from Colombia (Tuluá) and Bolivia (INPA). The specific objectives were: ...
Extensive farmland ecosystems are widespread and biodiversity-rich, yet they face important human pressures since the beginning of agriculture intensification, which is leading them into a severe biodiversity crisis. As a ...
Iberian Pinus uncinata tree-growth variability and its responses to climate are analyzed by means of dendrochonological methods from an individual- to a population-level scale across its distribution area in the Iberian ...
The symbiotic lifestyle represents a fundamental contribution to the diversity of marine ecosystems. Sponges are ideal models to study symbiotic relationships from evolutionary and ecological points of view since they are ...
Marine planktonic copepods play a key ecological role in pelagic food webs. The study of their patterns of activity is fundamental in order to better understand the processes involved in the transfer of energy from lower ...
The Antarctic bottoms harbour rich communities of sponges, which play an important role in structuring benthic habitats. Many Antarctic sponge species have been discovered in the past but most of them were poorly described ...
The role of consumer-resource relationship is the basis of the structure and functioning of ecological communities. The traditional lens for studying such interactions have tended to omit the importance of the species ...
