Viral abundance in aquatic systems:a comparison between marine and fresh waters

Maranger, Roxane; Df, Bird

doi:10.3354/meps121217

Cited by 242 publications

(271 citation statements)

References 21 publications

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“…At the hypertrophic site, the most possible reason is the phytoplankton bloom caused by dinoflagellates and cyanobacteria in spring (Lie et al, 2003), and because the peak of viral abundance recorded in April followed a marked chlorophyll a peak recorded in FebruaryMarch. It is suggested that high concentrations of phytoplankton might result in more planktonic viruses, and the significant correlation has been suggested by some previous studies (Boehme et al, 1993;Maranger & Bird, 1995;Weinbauer et al, 1995). In addition, phytoplankton had larger burst sizes than bacterioplankton, ranging from 92 to 500 (Bratbak et al, 1993;Suttle & Chan, 1994).…”

Section: Discussionmentioning

confidence: 50%

“…bacteria, cyanobacteria and algae), enumeration of viruses and their hosts in water samples is an important first step for elucidating the virus-host interaction. In most instances, viral abundance was significantly correlated with bacterioplankton abundance (Wommack & Colwell, 2000), but in a few studies, it showed significant correlation with chlorophyll a concentration (Boehme et al, 1993;Maranger & Bird, 1995). Temporal fluctuations in viral abundance have been studied at time scales ranging from hours (Bettarel et al, 2002) to seasons Fischer &Velimirov, 2002;Bettarel et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Variation of Virioplankton in a Eutrophic Shallow Lake

et al. 2006

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Lake Donghu is a typical eutrophic freshwater lake in which high abundance of planktonic viruses was recently revealed. In this study, seasonal variation of planktonic viruses were observed at three different trophic sites, hypertrophic, eutrophic, and mesotrophic regions, and the correlation between their abundances and other aquatic environmental components, such as bacterioplankton, chlorophyll a, burst size, pH, dissolved oxygen, and temperature, was analyzed for the period of an year. Virioplankton abundance detected by transmission electron microscope (TEM) ranged from 5.48 Â 10 8 to 2.04 Â 10 9 ml )1 in all the sites throughout the study, and the high abundances and seasonal variations of planktonic viruses were related to the trophic status at the sampled sites in Lake Donghu. Their annual mean abundances were, the highest at the hypertrophic site (1.23Â10 9 ml )1 ), medium at the eutrophic site (1.19Â10 9 ml )1 ), and the lowest at the mesotrophic site (1.02Â10 9 ml )1 ). The VBR (virus-to-bacteria ratio) values were high, ranging from 49 to 56 on average at the three sampled sites. The data suggested that the high viral abundance and high VBR values might be associated with high density of phytoplankton including algae and cyanobacteria in this eutrophic shallow lake, and that planktonic viruses are important members of freshwater ecosystems.

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Section: Discussionmentioning

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Seasonal Variation of Virioplankton in a Eutrophic Shallow Lake

et al. 2006

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“…Cochlan et al [17], Hara et al [26], Paul et al [34,35], Wommack et al [58] 1995 Maranger and Bird [31] survey 22 Quebec lakes and collect literature from 14 studies [4, 5, 7, 17, 26-28, 34, 41, 51, 58] and report VBR higher in freshwater (20)(21)(22)(23)(24)(25) than marine systems (1-5).…”

mentioning

confidence: 99%

“…Maranger and Bird [31] 2000 Wommack and Colwell suggest that VBR typically ranges between 3 and 10, and note that VBR decreases as prokaryote abundance increases.…”

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Re-examination of the relationship between marine virus and microbial cell abundances

et al. 2016

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Marine viruses are critical drivers of ocean biogeochemistry and their abundances vary spatiotemporally in the global oceans, with upper estimates exceeding 10 8 per ml. Over many years, a consensus has emerged that virus abundances are typically 10-fold higher than prokaryote abundances. The use of a fixed-ratio suggests that the relationship between virus and prokaryote abundances is both predictable and linear. However, the true explanatory power of a linear relationship and its robustness across diverse ocean environments is unclear. Here, we compile 5671 prokaryote and virus abundance estimates from 25 distinct marine surveys to characterize the relationship between virus and prokaryote abundances. We find that the median virus-to-prokaryote ratio (VPR) is 10:1 and 16:1 in the near-and sub-surface oceans, respectively. Nonetheless, we observe substantial variation in the VPR and find either no or limited explanatory power using fixed-ratio models. Instead, virus abundances are better described as nonlinear, power-law functions of prokaryote abundances -particularly when considering relationships within distinct marine surveys. Estimated power-laws have scaling exponents that are typically less than 1, signifying that the VPR decreases with prokaryote density, rather than remaining fixed. The emergence of power-law scaling presents a challenge for mechanistic models seeking to understand the ecological causes and consequences of marine virusmicrobe interactions. Such power-law scaling also implies that efforts to average viral effects on microbial mortality and biogeochemical cycles using "representative" abundances or abundanceratios need to be refined if they are to be utilized to make quantitative predictions at regional or global ocean scales.

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Antarctic Lakes as Models for the Study of Microbial Biodiversity, Biogeography and Evolution

Pearce

Laybourn‐Parry

2012

Antarctic Ecosystems

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Viral abundance in aquatic systems:a comparison between marine and fresh waters

Cited by 242 publications

References 21 publications

Seasonal Variation of Virioplankton in a Eutrophic Shallow Lake

Seasonal Variation of Virioplankton in a Eutrophic Shallow Lake

Re-examination of the relationship between marine virus and microbial cell abundances

Antarctic Lakes as Models for the Study of Microbial Biodiversity, Biogeography and Evolution

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