Major viral impact on the functioning of benthic deep-sea ecosystems

@article{Danovaro2008MajorVI,
  title={Major viral impact on the functioning of benthic deep-sea ecosystems},
  author={Roberto Danovaro and Antonio Dell'Anno and Cinzia Corinaldesi and Mirko Magagnini and Rachel T. Noble and Christian Tamburini and Markus G. Weinbauer},
  journal={Nature},
  year={2008},
  volume={454},
  pages={1084-1087}
}
Viruses are the most abundant biological organisms of the world’s oceans. Viral infections are a substantial source of mortality in a range of organisms—including autotrophic and heterotrophic plankton—but their impact on the deep ocean and benthic biosphere is completely unknown. Here we report that viral production in deep-sea benthic ecosystems worldwide is extremely high, and that viral infections are responsible for the abatement of 80% of prokaryotic heterotrophic production. Virus… Expand

Paper Mentions

Virus decomposition provides an important contribution to benthic deep-sea ecosystem functioning
TLDR
It is shown that, given the huge viral biomass of the ocean seafloor and the high rates of this process, virus decomposition provides a major source of labile organic compounds able to sustain the microbial food webs and nutrient cycling at a global scale. Expand
Viral control of biomass and diversity of bacterioplankton in the deep sea
TLDR
It is demonstrated that reduced viral pressure decreases the diversity of deep-sea bacterioplankton in the western Pacific Ocean, and network analysis showed that relieving viral pressure decreased the complexity and clustering coefficients but increased the proportion of positive correlations for the potentially active bacterial community, which suggests that viruses sustain a diverse microbial community in deep- sea environments. Expand
Virus-mediated archaeal hecatomb in the deep seafloor
TLDR
Interactions between archaea and their viruses might play a profound, previously underestimated role in the functioning of deep-sea ecosystems and in global biogeochemical cycles. Expand
From virus isolation to metagenome generation for investigating viral diversity in deep-sea sediments
TLDR
This work compared a physical-chemical procedure and a previously published sediment washing-based procedure for isolating viruses from benthic deep-sea ecosystems to generate viromes through high-throughput sequencing, and reveals thatDeep-sea sediments are a hot spot of novel viral genotypes and functions. Expand
Genomes of Abundant and Widespread Viruses from the Deep Ocean
TLDR
The first complete genomes of deep-sea viruses assembled from metagenomic fosmid libraries are described, indicating that lysogeny is the preferred mode of existence for deep-SEA viruses inhabiting an energy-limited environment, in sharp contrast to the predominantly lytic lifestyle of their photic-zone counterparts. Expand
Active and diverse viruses persist in the deep sub-seafloor sediments over thousands of years
TLDR
The results show that the Baltic Sea sub-seafloor biosphere harbors highly abundant viruses with densities up to 1.8 × 1010 viruses cm−3, and indicate that viruses of phototrophic hosts may persist in marine sediments for thousands of years. Expand
New perspectives in benthic deep-sea microbial ecology
TLDR
Estimating the diversity of deep-sea benthic microbes and understanding their functions are some of the challenges of absolute priority, not only forDeep-sea microbial ecology, but also for the entire research field of life sciences. Expand
Viral infections stimulate the metabolism and shape prokaryotic assemblages in submarine mud volcanoes
TLDR
The findings highlight the significant role of the viral shunt in sustaining the metabolism of prokaryotes and shaping their assemblage structure in mud volcano sediments, and they provide new clues for the understanding of the functioning of cold-seep ecosystems. Expand
High virus-to-cell ratios indicate ongoing production of viruses in deep subsurface sediments
TLDR
Even in the oldest sediments, microbial communities are capable of maintaining viral populations, indicating an ongoing viral production and thus, viruses provide an independent indicator for microbial life in the marine deep biosphere. Expand
Viruses and prokaryotes in the deep-sea
TLDR
This work has shown that microbes dominates both in terms of abundance and biomass the world oceans and that viruses are the most abundant biological entities of the biosphere, suggesting that viruses can account for the vast majority of the genetic diversity of the Earth. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 48 REFERENCES
Virus production and life strategies in aquatic sediments
TLDR
The results suggest that high benthic virus production rates can have a significant effect on bentho-benthic bacterial dynamics and indicate that virus production should be included in biogeochemical models of aquatic sediments. Expand
Marine viruses — major players in the global ecosystem
  • C. Suttle
  • Biology, Medicine
  • Nature Reviews Microbiology
  • 2007
TLDR
Viruses are by far the most abundant 'lifeforms' in the oceans and are the reservoir of most of the genetic diversity in the sea, thereby driving the evolution of both host and viral assemblages. Expand
Viral mortality of marine bacteria and cyanobacteria
TLDR
High viral abundance in the ocean but also counts of bacteria and cyanobacteria in the final irreversible stage of lytic infection demonstrate the existence of a significant new pathway of carbon and nitrogen cycling in marine food webs and have further implications for gene transfer between marine organisms. Expand
Infection of phytoplankton by viruses and reduction of primary productivity
TLDR
It is demonstrated that viral pathogens infect a variety of important marine primary producers, including diatoms, cryptophytes, prasinophytes and chroococcoid cyanobacteria, indicating that infection by viruses could be a factor regulating phytoplankton community structure and primary productivity in the oceans. Expand
Virioplankton: Viruses in Aquatic Ecosystems
TLDR
Novel applications of molecular genetic techniques have provided good evidence that viral infection can significantly influence the composition and diversity of aquatic microbial communities, supporting the hypothesis that viruses play a significant role in microbial food webs. Expand
Viriobenthos in freshwater and marine sediments : a review
TLDR
First results from a few studies using pulsed-field gel electrophoresis and especially from metagenomic analyses indicate, however, that viriobenthic assemblages are both highly diverse and distinct from the virioplankton. Expand
Viral dynamics in a coastal sediment: seasonal pattern, controlling factors and relations to the pelagic–benthic coupling
TLDR
A clear seasonal variability in the abundance of virobenthos that largely followed the variations in bacterial abundance is demonstrated and the data suggest that viruses may have considerable impact on benthic microbial mortality and carbon cycling. Expand
Viral infection plays a key role in extracellular DNA dynamics in marine anoxic systems
TLDR
The data suggest that DNA released by viral lysis, because of its high lability and fast turnover, may represent an important mechanism of trophic supply for prokaryotes, particularly in systems characterized by limited availability of external trophics. Expand
Distribution of Viruses and Dissolved DNA along a Coastal Trophic Gradient in the Northern Adriatic Sea
TLDR
The distribution of viral and other microbial abundances as well as the concentrations of dissolved DNA along a trophic gradient in the northern Adriatic Sea were determined and some kind of interaction between heterotrophic nanoflagellates and viruses is proposed, concluding that viral activity may play a significant role in food web structure under changing trophIC conditions. Expand
Ecology of prokaryotic viruses.
TLDR
Virus-induced mortality of prokaryotes varies strongly on a temporal and spatial scale and shows that phages can be important predators of bacterioplankton, which can strongly influence microbial food web processes and biogeochemical cycles. Expand
...
1
2
3
4
5
...