Differential Effects of Viruses on the Growth Efficiency of Freshwater Bacterioplankton in Eutrophic Relative to Non-Eutrophic Lakes
In aquatic environments, the consensus of viral impact on bacterial carbon metabolism with the nutrient environment as an important axis is limited. Henceforth, we explored the viral regulation of carbon-based bacterial growth efficiency (BGE) in a set of freshwater systems from French Massif Centra...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Microorganisms |
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| Online Access: | https://www.mdpi.com/2076-2607/11/2/384 |
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| author | Angia Sriram Pradeep Ram Télesphore Sime-Ngando |
| author_facet | Angia Sriram Pradeep Ram Télesphore Sime-Ngando |
| author_sort | Angia Sriram Pradeep Ram |
| collection | DOAJ |
| description | In aquatic environments, the consensus of viral impact on bacterial carbon metabolism with the nutrient environment as an important axis is limited. Henceforth, we explored the viral regulation of carbon-based bacterial growth efficiency (BGE) in a set of freshwater systems from French Massif Central, which were broadly classified based on two trophic statuses: eutrophic and non-eutrophic lakes. Comparative analysis showed that microbial abundances (viruses and bacteria) were 3-fold higher in eutrophic compared with non-eutrophic lakes, and so were bacterial production and viral lytic infection. The observed variability in BGE (10–60%) was explained by the uncoupling between bacterial respiration and production. Viruses through selective lysis of susceptible host communities had an antagonistic impact on BGE in the eutrophic lakes, whereas the release of substrates via viral shunt exerted a synergistic influence on the carbon metabolism of non-targeted host populations in non-eutrophic lakes. The decisive effect of the two individual processes (i.e., lysis and substrate release) on BGE was supported by regressions of bacterial abundance as a function of bacterial production, which is considered as a proxy of top-down processes. The role of viruses through their negative impact via mortality and positive impact via substrate supply can eventually have implications on carbon transfer through bacterioplankton in freshwaters. |
| first_indexed | 2024-03-11T08:22:53Z |
| format | Article |
| id | doaj.art-22fde0aedafd4296afe7bba421badaff |
| institution | Directory Open Access Journal |
| issn | 2076-2607 |
| language | English |
| last_indexed | 2024-03-11T08:22:53Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Microorganisms |
| spelling | doaj.art-22fde0aedafd4296afe7bba421badaff2023-11-16T22:15:07ZengMDPI AGMicroorganisms2076-26072023-02-0111238410.3390/microorganisms11020384Differential Effects of Viruses on the Growth Efficiency of Freshwater Bacterioplankton in Eutrophic Relative to Non-Eutrophic LakesAngia Sriram Pradeep Ram0Télesphore Sime-Ngando1Laboratoire Microorganismes, Génome et Environnement, UMR CNRS 6023, Université Clermont-Auvergne, CEDEX, 63178 Aubière, FranceLaboratoire Microorganismes, Génome et Environnement, UMR CNRS 6023, Université Clermont-Auvergne, CEDEX, 63178 Aubière, FranceIn aquatic environments, the consensus of viral impact on bacterial carbon metabolism with the nutrient environment as an important axis is limited. Henceforth, we explored the viral regulation of carbon-based bacterial growth efficiency (BGE) in a set of freshwater systems from French Massif Central, which were broadly classified based on two trophic statuses: eutrophic and non-eutrophic lakes. Comparative analysis showed that microbial abundances (viruses and bacteria) were 3-fold higher in eutrophic compared with non-eutrophic lakes, and so were bacterial production and viral lytic infection. The observed variability in BGE (10–60%) was explained by the uncoupling between bacterial respiration and production. Viruses through selective lysis of susceptible host communities had an antagonistic impact on BGE in the eutrophic lakes, whereas the release of substrates via viral shunt exerted a synergistic influence on the carbon metabolism of non-targeted host populations in non-eutrophic lakes. The decisive effect of the two individual processes (i.e., lysis and substrate release) on BGE was supported by regressions of bacterial abundance as a function of bacterial production, which is considered as a proxy of top-down processes. The role of viruses through their negative impact via mortality and positive impact via substrate supply can eventually have implications on carbon transfer through bacterioplankton in freshwaters.https://www.mdpi.com/2076-2607/11/2/384bacteriavirusesviral lysisbacterial growth efficiencytrophic statusFrench Massif Central lakes |
| spellingShingle | Angia Sriram Pradeep Ram Télesphore Sime-Ngando Differential Effects of Viruses on the Growth Efficiency of Freshwater Bacterioplankton in Eutrophic Relative to Non-Eutrophic Lakes Microorganisms bacteria viruses viral lysis bacterial growth efficiency trophic status French Massif Central lakes |
| title | Differential Effects of Viruses on the Growth Efficiency of Freshwater Bacterioplankton in Eutrophic Relative to Non-Eutrophic Lakes |
| title_full | Differential Effects of Viruses on the Growth Efficiency of Freshwater Bacterioplankton in Eutrophic Relative to Non-Eutrophic Lakes |
| title_fullStr | Differential Effects of Viruses on the Growth Efficiency of Freshwater Bacterioplankton in Eutrophic Relative to Non-Eutrophic Lakes |
| title_full_unstemmed | Differential Effects of Viruses on the Growth Efficiency of Freshwater Bacterioplankton in Eutrophic Relative to Non-Eutrophic Lakes |
| title_short | Differential Effects of Viruses on the Growth Efficiency of Freshwater Bacterioplankton in Eutrophic Relative to Non-Eutrophic Lakes |
| title_sort | differential effects of viruses on the growth efficiency of freshwater bacterioplankton in eutrophic relative to non eutrophic lakes |
| topic | bacteria viruses viral lysis bacterial growth efficiency trophic status French Massif Central lakes |
| url | https://www.mdpi.com/2076-2607/11/2/384 |
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