Affiliation:
1. Laboratoire Microorganismes, Génome et Environnement, UMR CNRS 6023, Université Clermont-Auvergne, CEDEX, 63178 Aubière, France
Abstract
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.
Subject
Virology,Microbiology (medical),Microbiology
Reference65 articles.
1. Microbial structuring of marine ecosystems;Azam;Nat. Rev. Microbiol.,2007
2. Two decades of describing the unseen majority of aquatic microbial diversity;Zinger;Mol. Ecol.,2021
3. Bandh, S.A., Shafi, S., and Shameem, N. (2021). Freshwater Microbiology, Academic Press. Chapter 1.
4. Influence of dissolved organic matter source on lake bacterioplankton structure and function-implications for seasonal dynamics of community composition;Kritzberg;FEMS Microb. Ecol.,2006
5. Experimental insights into the importance of aquatic bacterial community composition to the degradation of dissolved organic matter;Logue;ISME J.,2015
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