Virus-mediated transfer of nitrogen from heterotrophic bacteria to phytoplankton

Shelford, Emma J.; Suttle, Curtis A.

doi:10.5194/bg-15-809-2018

Cited by 21 publications

(11 citation statements)

References 47 publications

(63 reference statements)

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“…The accumulation of ammonium also corresponded to the utilization of organic matter. A previous incubation experiment also demonstrated that N-containing organic matter from vial lysates can be efficiently remineralized by heterotrophic bacteria, resulting in regenerated ammonium that could then be transferred to phytoplankton (Shelford & Suttle, 2018). In present study, ammo- (Shelford & Suttle, 2018).…”

Section: Viral Lysis Within the Aquatic Microbial Food Websupporting

confidence: 57%

Top‐down controls on nutrient cycling and population dynamics in a model estuarine photoautotroph–heterotroph co‐culture system

et al. 2020

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Viral lysis and protistan grazing are thought to be the major processes leading to microbial mortality in aquatic environments and thus regulate community diversity and biogeochemical cycling characteristics. Here, we studied nutrient cycling and bacterial responses to cyanophage-mediated photoautotroph lysis and ciliate predation in a model Synechococcus-heterotroph co-culture system. Both viral lysis and Euplotes grazing facilitated the transformation of organic carbon from biomass to dissolved organic matter with convention efficiencies of 20%-26%. The accumulation of ammonium after the addition of phages and ciliates suggested the importance of recycled NH 4 + occurred in the interactions between Synechococcus growth and heterotrophic bacterial metabolism of photosynthate. The slower efficiency of P mineralization compared to N (primarily ammonium) indicated that P-containing organic matter was primarily integrated into bacterial biomass rather than being remineralized into inorganic phosphate under C-rich conditions. In the cyanophage addition treatment, both Fluviicola and Alteromonas exhibited rapid positive responses to Synechococcus lysing, while Marivita exhibited an apparent negative response. Further, the addition of Euplotes altered the incubation system from a Synechococcus-driven phycosphere to a ciliate-remodelled zoosphere that primarily constituted grazing-resistant bacteria and Euplotes symbionts. Top-down controls increased co-culture system diversity and resulted in a preference for free-living lifestyles of dominant populations, which was accompanied by the transfer of matter and energy. Our results indicate topdown control was particularly important for organic matter redistribution and inorganic nutrient regeneration between photoautotrophs and heterotrophs, and altered bacterial lifestyles. This study consequently sheds light on marine biogeochemical cycling and the interaction networks within these dynamic ecosystems.

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Section: Viral Lysis Within the Aquatic Microbial Food Websupporting

confidence: 57%

Top‐down controls on nutrient cycling and population dynamics in a model estuarine photoautotroph–heterotroph co‐culture system

et al. 2020

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“…It has also been reported that viruses from different stages of infection are released from host bacterial cells at the same time, which can cause a large increase for the VBR value (Siokou-Frangou et al, 2010). Viruses can stimulate the growth of bacteria, and there are close relationships between viruses and bacteria, which has been supported by the results of many studies (Shelford and Suttle, 2018;Bongiorni et al, 2005;Stroinov et al, 2011;Vrede et al, 2003). In our study, we found that the abundance of viruses was positively related to abundance of bacteria.…”

Section: Correlation Between Virus and Bacteriasupporting

confidence: 85%

Coupling virio- and bacterioplankton populations with environmental variable changes in the Bohai Sea

Wang

et al. 2020

Acta Oceanol. Sin.

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Uncovering the role of environmental factors and finding critical factors which harbor significant fractions in governing microbial communities remain key questions in coastal marine systems. To detect the interactions between environmental factors and distributions of virio-and bacterioplankton in trophic coastal areas, we used flow cytometry to investigate the abundance of virio-and bacterioplankton covering 31 stations in the Bohai Sea of China. Our results suggested that the average abundance of total virus (TV) in winter (~2.29×10 8 particles/mL) was slightly lower than in summer (~3.83×10 8 particles/mL). The mean total bacterial abundance (TB) was much lower in winter (~2.54×10 7 particles/mL) than in summer (~5.43×10 7 particles/mL). Correlation analysis via redundancy analysis (RDA) and network analysis among virioplankton, bacterioplankton and environmental factors revealed that the abundances of viral and bacterial subpopulations depend on environmental factors. In winter, only temperature significantly influenced the abundances of virio-and bacterioplankton. In summer, in addition to temperature, both salinity and nutrient (SiO 2) had a remarkable impact on the distribution of virioand bacterioplankton. Our results showed a clear seasonal and trophic pattern throughout the whole water system, which revealed that temperature and eutrophication may play crucial roles in microbial distribution pattern.

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“…HOT4B5, which inhibits the growth of Prochlorococcus MIT9313 (Sher et al ., 2011). An alternative explanation is that host lysis by viruses releases nutrients and stimulates the growth of uninfected hosts, including cyanobacteria and heterotrophic bacteria (Sher et al ., 2011; Shelford and Suttle, 2018).…”

Section: Discussionmentioning

confidence: 99%

T4‐like myovirus community shaped by dispersal and deterministic processes in the South China Sea

Liu

Wang

et al. 2020

Environmental Microbiology

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Summary As the most abundant and genetically diverse biological entities, viruses significantly influence ecological, biogeographical and evolutionary processes in the ocean. However, the biogeography of marine viruses and the drivers shaping viral community are unclear. Here, the biogeographic patterns of T4‐like viruses and the relative impacts of deterministic (environmental selection) and dispersal (spatial distance) processes were investigated in the northern South China Sea. The dominant viral operational taxonomic units were affiliated with previously defined Marine, Estuary, Lake and Paddy Groups. A clear viral biogeographic pattern was observed along the environmental gradient from the estuary to open sea. Marine Groups I and IV had a wide geographical distribution, whereas Marine Groups II, III and V were abundant in lower‐salinity continental or eutrophic environments. A significant distance‐decay pattern was noted for the T4‐like viral community, especially for those infecting cyanobacteria. Both deterministic and dispersal processes influenced viral community assembly, although environmental selection (e.g. temperature, salinity, bacterial abundance and community, etc.) had a greater impact than spatial distance. Network analysis confirmed the strong association between viral and bacterial community composition, and suggested a diverse ecological relationship (e.g. lysis, co‐infection or mutualistic) between and within viruses and their potential bacterial hosts.

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Virus-mediated transfer of nitrogen from heterotrophic bacteria to phytoplankton

Cited by 21 publications

References 47 publications

Top‐down controls on nutrient cycling and population dynamics in a model estuarine photoautotroph–heterotroph co‐culture system

Top‐down controls on nutrient cycling and population dynamics in a model estuarine photoautotroph–heterotroph co‐culture system

Coupling virio- and bacterioplankton populations with environmental variable changes in the Bohai Sea

T4‐like myovirus community shaped by dispersal and deterministic processes in the South China Sea

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