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Viral control of bacterial biodiversity – Evidence from a nutrient enriched marine mesocosm experiment
University of Kalmar, School of Pure and Applied Natural Sciences.
University of Kalmar, School of Pure and Applied Natural Sciences.ORCID iD: 0000-0002-6405-1347
University of Kalmar, School of Pure and Applied Natural Sciences.
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2009 (English)In: Environmental Microbiology, ISSN 1462-2912, E-ISSN 1462-2920, Vol. 11, no 10, p. 2585-2597Article in journal (Refereed) Published
Abstract [en]

We demonstrate here results showing that bottom-up and top-down control mechanisms can operate simultaneously and in concert in marine microbial food webs, controlling prokaryote diversity by a combination of viral lysis and substrate limitation. Models in microbial ecology predict that a shift in the type of bacterial growth rate limitation is expected to have a major effect on species composition within the community of bacterial hosts, with a subsequent shift in the composition of the viral community. Only moderate effects would, however, be expected in the absolute number of coexisting virus-host pairs. We investigated these relationships in nutrient-manipulated systems, under simulated in situ conditions. There was a strong correlation in the clustering of the viral and bacterial community data supporting the existence of an important link between the bacterial and viral communities. As predicted, the total number of viral populations was the same in all treatments, while the composition of the viral community varied. Our results support the theoretical prediction that there is one control mechanism for the number of niches for coexisting virus-host pairs (top-down control), and another mechanism that controls which virus-host pairs occupy these niches (bottom-up control).

Place, publisher, year, edition, pages
2009. Vol. 11, no 10, p. 2585-2597
National Category
Microbiology
Research subject
Natural Science, Microbiology
Identifiers
URN: urn:nbn:se:lnu:diva-2019DOI: 10.1111/j.1462-2920.2009.01983.xOAI: oai:DiVA.org:lnu-2019DiVA, id: diva2:309067
Available from: 2010-04-06 Created: 2010-04-06 Last updated: 2017-12-12Bibliographically approved

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Gómez-Consarnau, LauraPinhassi, JaroneRiemann, Lasse

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