Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Stream Hydrological Fragmentation Drives Bacterioplankton Community Composition |
| Abstract | In Mediterranean intermittent streams, the hydrological fragmentation in summer and the successive water flow reconvergence in autumn allow exploring how local processes shape the microbial community within the same habitat. The objectives of this study were to determine how bacterial community composition responded to hydrological fragmentation in summer, and to evaluate whether the seasonal shifts in community composition predominate over the effects of episodic habitat fragmentation. The bacterial community was assessed along the intermittent stream Fuirosos (Spain), at different levels of phylogenetic resolution by in situ hybridization, fingerprinting, and 16S rRNA gene sequencing. The hydrological fragmentation of the stream network strongly altered the biogeochemical conditions with the depletion of oxidized solutes and caused changes in dissolved organic carbon characteristics. In the isolated ponds, beta-Proteobacteria and Actinobacteria increased their abundance with a gradual reduction of the alpha-diversity as pond isolation time increased. Moreover, fingerprinting analysis clearly showed a shift in community composition between summer and autumn. In the context of a seasonal shift, the temporary stream fragmentation simultaneously reduced the microbial dispersion and affected local environmental conditions (shift in redox regime and quality of the dissolved organic matter) tightly shaping the bacterioplankton community composition. |
| Source | PloS one 8 (5), pp. 1–10 |
| Keywords | temporary watersbacteriastream ecology |
| Journal | PloS one |
| Editor | Public Library of Science, San Francisco, CA, Stati Uniti d'America |
| Year | 2013 |
| Type | Articolo in rivista |
| Authors | Fazi S., Vazquez E., Casamayor E.O., Amalfitano S., Butturini A. |
| Text | 223567 2013 temporary waters bacteria stream ecology Stream Hydrological Fragmentation Drives Bacterioplankton Community Composition Fazi S., Vazquez E., Casamayor E.O., Amalfitano S., Butturini A. Water Research Institute, National Research Council of Italy IRSA CNR , Monterotondo, Roma, Italy Department d Ecologia, Facultat de Biologia, Universitat de Barcelona UB , Barcelona, Spain Department of Continental Ecology Biodiversity and Biogeodynamics Interactions, Centro de Estudios Avanzados de Blanes, Consejo Superior de Investigaciones Cient ´ficas CEAB CSIC , Blanes, Girona, Spain In Mediterranean intermittent streams, the hydrological fragmentation in summer and the successive water flow reconvergence in autumn allow exploring how local processes shape the microbial community within the same habitat. The objectives of this study were to determine how bacterial community composition responded to hydrological fragmentation in summer, and to evaluate whether the seasonal shifts in community composition predominate over the effects of episodic habitat fragmentation. The bacterial community was assessed along the intermittent stream Fuirosos Spain , at different levels of phylogenetic resolution by in situ hybridization, fingerprinting, and 16S rRNA gene sequencing. The hydrological fragmentation of the stream network strongly altered the biogeochemical conditions with the depletion of oxidized solutes and caused changes in dissolved organic carbon characteristics. In the isolated ponds, beta Proteobacteria and Actinobacteria increased their abundance with a gradual reduction of the alpha diversity as pond isolation time increased. Moreover, fingerprinting analysis clearly showed a shift in community composition between summer and autumn. In the context of a seasonal shift, the temporary stream fragmentation simultaneously reduced the microbial dispersion and affected local environmental conditions shift in redox regime and quality of the dissolved organic matter tightly shaping the bacterioplankton community composition. 8 Articolo pubblicato Fazi_stream_hydrological.pdf Articolo in rivista Public Library of Science 1932 6203 PloS one PloS one PLoS ONE PloS one Public Library of Science one PLoS 1 stefano.fazi FAZI STEFANO stefano.amalfitano AMALFITANO STEFANO TA.P04.032.002 Ruolo delle comunita microbiche nei cicli biogeochimici e nella degradazione degli inquinanti |