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Changes in freshwater bacterial community composition during measurements of microbial and community respiration

Gattuso, Jean-Pierre ; Peduzzi, Sandro ; Pizay, Marie-Dominique ; Tonolla, Mauro

In: Journal of Plankton Research, 2002, vol. 24, no. 11, p. 1197-1206

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    Title
    • Changes in freshwater bacterial community composition during measurements of microbial and community respiration
    Author
    • Gattuso, Jean-Pierre. Laboratoire D'océanographie De Villefranche, Umr 7093 Cnrs-Upmc, B. P. 28, F-06234 Villefranche-Sur-Mer Cedex, France and
    • Peduzzi, Sandro. Cantonal Institute of Microbiology, Microbial Ecology, University of Geneva, Via Mirasole Rd, Ch-6500 Bellinzont, Switzerland
    • Pizay, Marie-Dominique. Laboratoire D'océanographie De Villefranche, Umr 7093 Cnrs-Upmc, B. P. 28, F-06234 Villefranche-Sur-Mer Cedex, France and
    • Tonolla, Mauro. Cantonal Institute of Microbiology, Microbial Ecology, University of Geneva, Via Mirasole Rd, Ch-6500 Bellinzont, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Journal of Plankton Research, 2002, vol. 24, no. 11, p. 1197-1206. Oxford University Press
    Other Version
    Classification
    • Health
    OAI-PMH Identifier
    • oai:doc.rero.ch:304478
    Summary
    The respiration rates of a pelagic community and of its microbial fraction (< 1.2 μm) were measured at two depths in the oxic layer of a meromictic alpine lake (Cadagno, Switzerland) using the oxygen technique. The duration of the incubations were 12, 24 and 55 h. Bacterioplankton abundance (DAPI counts) and composition (whole cell hybridization using 11 group-specific rRNA-targeted oligonucleotide probes) were measured during the incubations. Respiration generally increased with time, especially in the microbial fraction, or remained similar. This result was not always consistent with changes in bacterial abundance and cell volume. The composition of the community also changed during the incubations. The abundance of β-Proteobacteria increased during the course of all the experiments. These results extend the previous conclusions drawn in marine environments to fresh waters and demonstrate that, in addition to changes in bacterial abundance, cell volume and biomass, changes in the taxonomic composition of the bacterial community can occur during discrete incubations of freshwater planktonic communities