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. 2006 Jun;72(6):4440-5.
doi: 10.1128/AEM.00021-06.

Depth-related gradients of viral activity in Lake Pavin

J Colombet  1 , T Sime-Ngando, H M Cauchie, G Fonty, L Hoffmann, G Demeure
Affiliations

Depth-related gradients of viral activity in Lake Pavin

J Colombet et al. Appl Environ Microbiol. 2006 Jun.

Abstract

High-resolution vertical sampling and determination of viral and prokaryotic parameters in a deep volcanic lake shows that in the absence of thermal stratification but within light, oxygen, and chlorophyll gradients, host availability empirically is prevalent over the physical and chemical environments and favors lytic over lysogenic "viral life cycles."

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Figures

FIG. 1.
FIG. 1.
Vertical variations of oxygen and chlorophyll a concentrations in Lake Pavin. Error bars represent standard deviations for triplicates. The three layers (mixolimnion, oxycline, and deep monimolimnion) of the sampled water column are shown.
FIG. 2.
FIG. 2.
Vertical variations of the relative abundances of viral size classes (i.e., percentage of total observed), of viral abundance (VA) and lytic production (VP), of bacterial abundance (BA) and production (BP), and of the abundance of HNF in Lake Pavin. Error bars represent standard deviations for triplicates. The three layers (mixolimnion, oxycline, and deep monimolimnion) of the sampled water column are shown.
FIG. 3.
FIG. 3.
Vertical variations of lytic virus-mediated (VBM) and potential grazing-mediated mortalities in bacterial assemblages and of the FIC and FLC in Lake Pavin. BP, bacterial production. Error bars represent standard deviations for triplicates. The three layers (mixolimnion, oxycline, and deep monimolimnion) of the sampled water column are shown.
See this image and copyright information in PMC

References

    1. Amblard, C., and G. Bourdier. 1990. The spring bloom of the diatom Melosira italica subsp. subarctica in Lake Pavin: biochemical, energetic and metabolic aspects during sedimentation. J. Plankton Res. 12:645-660.
    1. Bettarel, Y., T. Sime-Ngando, C. Amblard, and J. Dolan. 2004. Viral activity in two contrasting lake ecosystems. Appl. Environ. Microbiol. 70:2941-2951. - PMC - PubMed
    1. Bettarel, Y., T. Sime-Ngando, C. Amblard, J.-F. Carrias, and C. Portelli. 2003. Virioplankton and microbial communities in aquatic systems: a seasonal study in two lakes of differing trophy. Freshwater Biol. 48:810-822.
    1. Carrias, J.-F., A. Thouvenot, C. Amblard, and T. Sime-Ngando. 2001. Dynamics and growth estimates of planktonic protists during early spring in Lake Pavin, France. Aquat. Microb. Ecol. 24:163-174.
    1. Carrias, J.-F., C. Amblard, and G. Bourdier. 1996. Protistan bacterivory in a oligomesotrophic lake: importance of attached ciliates and flagellates. Microb. Ecol. 31:249-268. - PubMed

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