Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Groundwater geochemistry and microbial community structure in the aquifer transition from volcanic to alluvial areas |
| Abstract | Groundwaters may act as sinks or sources of organic and inorganic solutes, depending on the relative magnitude of biochemical mobilizing processes and groundwater-surface water exchanges. The objective of this study was to link the lithological and hydrogeological gradients to the aquatic microbial community structure in the transition from aquifer recharge (volcanic formations) to discharge areas (alluvial deposits). A field-scale analysis was performed along a water table aquifer in which volcanic products decreased in thickness and areal extension, while alluvial deposits became increasingly important. We measured the main groundwater physical parameters and the concentrations of major and trace elements. In addition, the microbial community structure was assessed by estimating the occurrence of total coliforms and Escherichia coli, the prokaryotic abundance, the cytometric and phylogenetic community composition. The overall biogeochemical asset differed along the aquifer flow path. The concentration of total and live prokaryotic cells significantly increased in alluvial waters, together with the percentages of Beta- and Delta-Proteobacteria. The microbial propagation over a theoretical groundwater travel time allowed for the identification of microbial groups shifting significantly in the transition between the two different hydrogeochemical facies. The microbial community structure was intimately associated with geochemical changes, thus it should be further considered in view of a better understanding of groundwater ecology and sustainable management strategies. © 2014 Elsevier Ltd. |
| Source | Water research (Oxf.) 65, pp. 384–394 |
| Keywords | CARD-FISHFecal indicator bacteriaFlow cytometryHydrogeologyMicrobial propagation |
| Journal | Water research (Oxf.) |
| Editor | Pergamon Press., New York, Regno Unito |
| Year | 2014 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.watres.2014.08.004 |
| Authors | Amalfitano, Stefano; Del Bon, Andrea; Zoppini, Annamaria; Ghergo, Stefano; Fazi, Stefano Fazi, Alberto; Parrone, Daniele; Casella, Patrizia; Stano, F.; Preziosi, Elisabetta |
| Text | 297564 2014 10.1016/j.watres.2014.08.004 Scopus 2 s2.0 84906509806 CARD FISH Fecal indicator bacteria Flow cytometry Hydrogeology Microbial propagation Groundwater geochemistry and microbial community structure in the aquifer transition from volcanic to alluvial areas Amalfitano, Stefano; Del Bon, Andrea; Zoppini, Annamaria; Ghergo, Stefano; Fazi, Stefano Fazi, Alberto; Parrone, Daniele; Casella, Patrizia; Stano, F.; Preziosi, Elisabetta IRSA CNR Groundwaters may act as sinks or sources of organic and inorganic solutes, depending on the relative magnitude of biochemical mobilizing processes and groundwater surface water exchanges. The objective of this study was to link the lithological and hydrogeological gradients to the aquatic microbial community structure in the transition from aquifer recharge volcanic formations to discharge areas alluvial deposits . A field scale analysis was performed along a water table aquifer in which volcanic products decreased in thickness and areal extension, while alluvial deposits became increasingly important. We measured the main groundwater physical parameters and the concentrations of major and trace elements. In addition, the microbial community structure was assessed by estimating the occurrence of total coliforms and Escherichia coli, the prokaryotic abundance, the cytometric and phylogenetic community composition. The overall biogeochemical asset differed along the aquifer flow path. The concentration of total and live prokaryotic cells significantly increased in alluvial waters, together with the percentages of Beta and Delta Proteobacteria. The microbial propagation over a theoretical groundwater travel time allowed for the identification of microbial groups shifting significantly in the transition between the two different hydrogeochemical facies. The microbial community structure was intimately associated with geochemical changes, thus it should be further considered in view of a better understanding of groundwater ecology and sustainable management strategies. © 2014 Elsevier Ltd. 65 http //www.scopus.com/record/display.url eid=2 s2.0 84906509806 origin=inward Articolo in rivista Pergamon Press. 0043 1354 Water research Oxf. Water research Oxf. Water res. Oxf. Water research. Oxf. DEL BON ANDREA CASELLA PATRIZIA danieleparrone PARRONE DANIELE stefano.ghergo GHERGO STEFANO stefano.fazi FAZI STEFANO elisabetta.preziosi PREZIOSI ELISABETTA stefano.amalfitano AMALFITANO STEFANO annamaria.zoppini ZOPPINI ANNAMARIA |