Abstract

Through denitrification, attached bacterial communities reduce water nitrogen loads during transport from land to river. In an in situ colonization experiment, spatial and temporal dynamics in composition of bacterial communities and denitrification activity were studied in bacterial biofilms in an alluvial aquifer. Mesh bags with glass beads were installed in different wells in an alluvial aquifer affected by surface water fluxes from an adjacent river and biofilms were sampled throughout the 15-month experiment. By combining structural (PCR-DGGE using nosZ genes) and functional (Denitrification Enzyme Activity measurements) descriptors, the denitrifiers community structure of biofilms and their functional responses were studied. Denitrifiers bacterial community composition developed on beads linked to denitrification capability were correlated with the modeled load of dissolved organic carbon coming from the river and dissolved oxygen concentration, which were set by the river channel water flow through the aquifer. (C) 2015 Elsevier B.V. All rights reserved.

Keywords

River Garonne; Floodplain; Alluvial aquifer; Biofilm; Attached bacteria; Denitrification

Published in

Ecological Engineering
2015, Volume: 80, pages: 191-197
Publisher: ELSEVIER SCIENCE BV

SLU Authors

• Hallin, Sara

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    

• Enwall, Karin

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    

Sustainable Development Goals

SDG6 Ensure availability and sustainable management of water and sanitation for all


UKÄ Subject classification

Microbiology


Publication identifier

DOI: https://doi.org/10.1016/j.ecoleng.2015.02.002

Permanent link to this page (URI)

https://res.slu.se/id/publ/68496