Departament de Ciències Ambientals: Enviaments recents
Ara mostrant els elements 21-40 de 79
Soil and vegetation carbon dynamics (stocks and fluxes) and litter decomposition in a Mediterranean non-tidal salt marsh
Salt marshes are considered key ecosystems for climate regulation because they have a high carbon sequestration capacity. However, most studies of carbon sequestration capacity of these ecosystems have been performed in ...
Biofilm responses to flow intermittency in Mediterranean rivers
Currently, global change is promoting the spatiotemporal occurrence of temporary streams, altering fluvial ecosystem function and structure, and the ecosystem services they provide. To effectively protect fluvial ecosystems, ...
Dissecting the assembly process of benthic communities from Neotropical streams
I used the metacommunity framework to dissect the relative influences of dispersal (in ecological and evolutionary timeframes), selection (driven by abiotic factors) and ecological drift on the assembly process of freshwater ...
Metacommunities and biodiversity patterns in Mediterranean temporary ponds: the role of pond size, network connectivity and dispersal mode
We sampled the macrofaunal metacommunities in four networks of Mediterranean temporary ponds covering a wide range of pond sizes and different spatial extents. 1) In the smallest pond network, pond size was not related to ...
Resilience of aquatic metacommunities: implications for disturbance recovery
During the last years, there has been an increase in the number and intensity of disturbances, and their consequences related with global change, which have corroborated the already forecasted scenarios. One example are ...
Els prats de dall de la terra baixa catalana. Caracterització geobotànica, valoració agroambiental i estudi de les relacions fitosociològiques entre els prats dalladors de l'Europa occidental
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 ...
Flow alteration and wastewater inputs effects on freshwater communities in Mediterranean rivers
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 ...
Multiple stressor effects on river biofilm communities: from community composition to ecosystem processes using experimental mesocosms
Human exploitation of river ecosystems, together with the increasing pressure that represents climate change, is posing rivers worldwide at risk. In rivers, microorganisms are ecologically very important. Most of ...
Reproductive and condition status of “cold water” marine fish: new insights from a changing environment
Exploited marine fish species with an affinity for cold waters inhabiting close to the warmer edge of their distribution area are exposed to stress caused by fishing and climate change. Three case studies of “cold water ...
Efectes del canvi global a les rouredes de Quercus petraea al NE de la Península Ibèrica
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 ...
Estudio de la red trófica microbiana en lagunas someras: autotrofia versus heterotrofia
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 ...
Microbial community assembly and biogeography in the Pyrenean lacustrine district
The microbial metacommunity of the Pyrenees mountain range has never been studied at the regional level. In this PhD thesis, the main goal is to describe the taxonomic diversity and reveal the ecological processes (biotic ...
Arsenic and fluvial biofilms: biogeochemistry, toxicity and biotic interactions
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 biofilms in the ...
Climate change and Mediterranean ecosystems: plant and soil responses to UV radiation and water availability before and after a perturbation
Taking into account the expected changes in solar UV levels, precipitation and fire regime in the Mediterranean basin, the main goal of this thesis was to evaluate the effects of UV radiation (UV-A and UV-B) and diminished ...
Estudi dels patrons de colonització postincendi en vertebrats al llarg de gradients ambientals i espacials
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 ...
Effects of global change on fish assemblages in Mediterranean streams
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 ...
Controls on the dynamics of riverine dissolved organic matter: insights from a Mediterranean river network
In river networks, dissolved organic matter (DOM) constitutes the major pool of organic carbon, and plays a key role as energy source and modulator of toxic substances availability. In this thesis, Joan P. Casas-Ruiz and ...
Pharmaceuticals and endocrine disruptors: accumulation in aquatic biota and environmental effects
Occurrence, fate, and adverse effects of emerging contaminants in the aquatic environment have become a matter of concern, since these compounds have been persistently detected in wastewater treatment plant (WWTP) effluents, ...
O potencial didático das imagens geocientíficas em livros de textos do ensino secundário: representação da dinâmica interna da terra
Dada la importancia de ilustraciones científicas en los procesos de aprendizaje de contenidos geológicos, se investigó posibles relaciones entre su potencial educativo y sus etapas de producción en los libros de texto de ...
Influences of toxicants on freshwater biofilms and fish: from experimental approaches to statistical models
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 ...
