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Please use this identifier to cite or link to this item: http://hdl.handle.net/2108/576

Title: Structure and function of benthic microbial community in highly variable freshwater systems
Authors: Puddu, Alberto
Amalfitano, Stefano
Keywords: fiumi temporanei
sedimento
stress idrico
comunità batterica
metabolismo batterico
ibridazione in situ
colonizzazione colonna d’acqua
temporary rivers
sediment
water stress
bacterial community
bacterial metabolism
in situ hybridization
water phase colonization
Issue Date: 26-Aug-2008
Abstract: In the semi-arid Mediterranean regions, extended reaches of rivers and streams show a recurrent dry phases of varying duration and spatial extent. It is important to study the effects of water stress on riverine ecological processes since freshwater systems are crucial in linking terrestrial and marine environments, My Doctorate thesis research, supported by the European TempQsim project (EVK1-CT2002-00112), was aimed to investigate the dynamics of microbial communities associated to sediments in temporary rivers. In particular, I have been investigating the effects of water stress on the structure and function of benthic bacterial communities and their role in the carbon cycle of rivers characterized by a seasonal hydrologic regime. Bacterial abundance and phylogenetic composition were assessed by molecular techniques, while bacterial activity was estimated by measuring the incorporation rates of radioactive tracers and by immunofluorescence. From a methodological point of view, all a...
Description: 19. ciclo
URI: http://hdl.handle.net/2108/576
Appears in Collections:Tesi di dottorato in scienze matematiche e fisiche

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