Temporal variations in viral distributions in the anoxic Cariaco Basin

Taylor, Gordon T.; Hein, Christopher J.; Iabichella, M.

doi:10.3354/ame030103

Cited by 49 publications

(63 citation statements)

References 44 publications

(76 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Peaks in virus concentrations occurred at a depth of 7 m, which approximately corresponds to the position of the thermo-halocline in Bundera Sinkhole. This is consistent with previous observations of virus accumulations at physical transition zones, including thermoclines and oxyclines, within stratified water columns (Taylor et al 2003).…”

Section: Stratification Of the Virus Communitysupporting

confidence: 82%

Stratification of the microbial community inhabiting an anchialine sinkhole

Seymour¹,

Humphreys²,

Mitchell³

2007

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

Section: Stratification Of the Virus Communitysupporting

confidence: 82%

Stratification of the microbial community inhabiting an anchialine sinkhole

Seymour¹,

Humphreys²,

Mitchell³

2007

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

“…Previous studies have also found peaks in concentrations of prokaryotes and viruses at transition zones in stratified aquatic environments, including peaks in the thermocline (Weinbauer et al 1995) and oxycline (Taylor et al 2003) of oceanic environments, and in the metalimnion of stratified lakes that have either an oxic (Bettarel et al 2003) or an anoxic (Weinbauer & Hofle 1998a) hypolimnion. In the latter 2 reports, significant differences in FVIC were also found between the epi-and hypolimnion.…”

Section: Spatial Patterns Of Prokaryotes Viruses and Fvicmentioning

confidence: 99%

Spatial and temporal variability of prokaryotes, viruses, and viral infections of prokaryotes in an alkaline, hypersaline lake

Brum

Steward²,

Jiang³

et al. 2005

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

Mono Lake is a large, alkaline, moderately hypersaline lake containing planktonic prokaryotes and viruses at concentrations that are among the highest reported for natural aquatic environments. We hypothesized that pronounced seasonality in physical and biological forcing and strong vertical gradients of chemical, physical, and biological parameters in this meromictic lake would result in dramatic temporal and spatial variability in concentrations of viruses and viral infections of prokaryotes. To test this, we investigated the temporal, vertical, and horizontal variability in hydrography, microbial concentrations, and viral infections of prokaryotes at 4 stations over a 10 mo period in Mono Lake. The infection parameters quantified included the frequency of visibly infected cells (FVIC), burst size, intracellular virus diameter, and volume of infected cells. Concentrations of chlorophyll a (chl a), prokaryotes, and viruses in individual samples ranged from 3.3 to 150 µg l , and 0.14 to 1.9 × 10 12 l -1, respectively, with the highest concentrations of each occurring in the spring. For all data combined, concentrations of viruses were significantly correlated with concentrations of prokaryotes (r = 0.68, p < 0.001, n = 68), but not with chl a. FVIC ranged from < 0.1 to 3.5% for the community, but reached as high as 13% for coccoid cells in 1 sample. Averaged over the water column, the estimated fraction of prokaryote mortality due to viral lysis ranged from a low of 3.7% in September, to a high of 16% in July. Burst size, intracellular virus diameters, and volumes of infected cells were temporally variable with a trend of decreasing burst size through the spring and summer as a result of larger viruses infecting smaller cells. In contrast, these parameters did not differ systematically among stations or between the anoxic and oxic layers of the lake. The data suggested that seasonal forcing is the primary source of variability in viral infections in the lake. Overall, viral lysis appeared to make a modest contribution to the mortality of prokaryotes, but high virus-host contact rates suggested that viruses are likely to influence the clonal diversity of picoplankton in the lake. KEY WORDS: Prokaryotes · Viruses · Hypersaline lake · Variability Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 41: [247][248][249][250][251][252][253][254][255][256][257][258][259][260] 2005 it has been hypothesized that the exceptionally high concentrations of viruses and prokaryotes in Mono Lake would be accompanied by a high incidence of infection (Jiang et al. 2004). If true, then viruses could have a substantial effect on the flow of carbon in the lake.Estimates of viral infection rates have been made for a variety of aquatic environments including freshwater, seawater, and hypersaline ponds; however, mechanisms controlling the frequency of viral infection are not always clear. While general associations have been observed between infection rates and indicators of troph...

show abstract

“…5). A similar phenomenon was described by Taylor et al (2003) for variations of viral particles and prokaryotic abundance between three layers (oxic, transitional, and hypoxic) of the water column in Cariaco Basin. These authors found viral distribution to be marked by an environmental oxygen gradient, which was clearly reflected in VP-ratios; the higher proportions corresponded to the hypoxic zone.…”

Section: Discussionmentioning

confidence: 70%

“…The methodology utilized in this research (i.e. fixation with glutaraldehyde and storing at 4ºC) is the most common method used to preserve and store viruses for determining their abundance in aquatic ecosys- Fuhrman, 1998;Chen et al, 2001;Hewson et al, 2001;Culley and Welschmeyer, 2002;Taylor et al, 2003;Corinaldesi et al, 2003;Glud and Middelboe, 2004;Lunau et al, 2005;Vanucci et al, 2005). Nevertheless, this methodology is becoming controversial because there is evidence showing that it can underestimate viral abundance (Brussaard, 2004;Wen et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, it has been shown that the presence of low oxygen waters and/or strong oxygen gradients in the water column can affect the abundance of virus-like particles (VLP; Taylor et al, 2003;Weinbauer et al, 2003). The oxygen minimum zone (OMZ) of the Humboldt Current System (HCS) is a strong physical barrier for the distribution of many organisms (Antezana, 1978;Judkins, 1980;González and Quiñones, 2002), and the prokaryote community inhabiting it is quite different to that living in the oxygenated surface waters, as shown for archaea (Levipan, 2006), nitrifying communities (Castro-González, 2004), and photosynthetic cyanobacteria (Prochlorococcus sp.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Relationship between viral and prokaryotic abundance on the Bajo O’Higgins 1 Seamount (Humboldt Current System off Chile)

Quiñones¹

2007

Sci. Mar.

View full text Add to dashboard Cite

SUMMARY: There is little known about the ecology of microbial communities living in the water column over seamounts. Here, for the first time, the spatial distribution and abundance of virus-like particles (VLP) are described over a seamount. The association between VLP distribution, prokaryotic abundance, and environmental variables is also analyzed. Sampling was conducted in December 2004 on the Bajo O'Higgins 1 seamount (32°54'S, 73°53'W) located in the Humboldt Current System off Chile. A oxygen minimum layer (OMZ) was clearly present between 130 and 280 m in the water column over the seamount. Water samples were taken with Niskin bottles at 10 oceanographic stations over the seamount at depths of 5, 20, 50, 75, 100, and 150 m and at the benthic boundary layer (BBL; 5-12 m over the sediments). Temperature, salinity, oxygen, chlorophyll a, and phaeopigments were measured at each station. Viral and prokaryotic abundances were determined with fluorochrome SYBR Green I. Viral abundance ranged from 1.53 x 10 9 VLP L -1 -16.48 x 10 9 VLP L -1 , whereas prokaryotic abundance ranged from 1.78 x 10 8 cell L -1 -14.91 x 10 8 cell L -1 . The virus-like particle/prokaryote ratio varied widely among the analyzed layers (i.e. surface, OMZ, and BBL), probably due to the presence of different prokaryotic and viral assemblages in each layer. Our results indicate that the environmental conditions, mainly the concentration of dissolved oxygen in the water column over Bajo O'Higgins 1 seamount, shape the association between viral and prokaryotic abundance.Keywords: virus-like particles, prokaryotes, seamount, oxygen minimum zone, benthic boundary layer, Humboldt Current System. RESUMEN: RELACIÓN ENTRE LA ABUNDANCIA VIRAL Y PROCARIÓTICA SOBRE EL MONTE SUBMARINO BAJO O'HIGGINS 1 (SISTEMA DE LA CORRIENTE DE HUMBOLDT FRENTE A CHILE). -La ecología de comunidades microbianas que habitan en la columna de agua sobre montes submarinos es escasamente conocida. Aquí, por primera vez, se describe la distribución y abundancia de partículas virales (VLP) sobre un monte submarino. La asociación entre la distribución de VLP, abundancia de procariotas y variables ambientales es también analizada. El muestreo fue realizado en Diciembre del 2004 sobre el monte submarino Bajo O'Higgins 1 (32°54'S, 73°53'W) localizado en el Sistema de la Corriente de Humboldt frente a Chile. Una zona de mínimo oxígeno se detectó entre 130 y 280 m en la columna de agua sobre el monte submarino. Las muestras de agua fueron tomadas con botellas Niskin desde 10 estaciones oceanográficas a 5, 20, 50, 75, 100, y 150 m de profundidad y en la capa de interfase bentónica (BBL; 5-12 m sobre el sedimento). Las variables temperatura, salinidad, oxígeno, clorofila a y feopigmentos fueron medidas en cada estación. La abundancia de virus y procariotas se determinó utilizando el fluorocromo SYBR Green I. La abundancia viral varió entre 1.53 x 10 9 VLP L -1 -16.48 x 10 9 VLP L -1 , mientras que la abundancia de células procariotas lo hizo entre 1.78 x 10 8 células L -1 -14.91 x 10 ...

show abstract

Temporal variations in viral distributions in the anoxic Cariaco Basin

Cited by 49 publications

References 44 publications

Stratification of the microbial community inhabiting an anchialine sinkhole

Stratification of the microbial community inhabiting an anchialine sinkhole

Spatial and temporal variability of prokaryotes, viruses, and viral infections of prokaryotes in an alkaline, hypersaline lake

Relationship between viral and prokaryotic abundance on the Bajo O’Higgins 1 Seamount (Humboldt Current System off Chile)

Contact Info

Product

Resources

About