Cristin-resultat-ID: 1643956
Sist endret: 13. mars 2019 14:23
NVI-rapporteringsår: 2018
Resultat
Vitenskapelig artikkel
2018

Seasonality drives microbial community structure, shaping both eukaryotic and prokaryotic host–viral relationships in an Arctic marine ecosystem

Bidragsytere:
  • Ruth-Anne Sandaa
  • Julia Endresen Storesund
  • Emily Maria Olesin
  • Maria Lund Paulsen
  • Aud Larsen
  • Gunnar Bratbak
  • mfl.

Tidsskrift

Viruses
ISSN 1999-4915
e-ISSN 1999-4915
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2018
Publisert online: 2018
Trykket: 2018
Volum: 10:715
Hefte: 12
Sider: 1 - 22
Open Access

Importkilder

Scopus-ID: 2-s2.0-85058727115

Klassifisering

Vitenskapsdisipliner

Basale biofag

Emneord

Virus • Nordområdene og Arktis • Marin mikrobiologi

Finansiering

  • Norges forskningsråd

    • Prosjektkode: 225956
  • EC/H2020

    • Prosjektkode: 685778

Beskrivelse Beskrivelse

Tittel

Seasonality drives microbial community structure, shaping both eukaryotic and prokaryotic host–viral relationships in an Arctic marine ecosystem

Sammendrag

The Arctic marine environment experiences dramatic seasonal changes in light and nutrient availability. To investigate the influence of seasonality on Arctic marine virus communities, five research cruises to the west and north of Svalbard were conducted across one calendar year, collecting water from the surface to 1000 m in depth. We employed metabarcoding analysis of major capsid protein g23 and mcp genes in order to investigate T4-like myoviruses and large dsDNA viruses infecting prokaryotic and eukaryotic picophytoplankton, respectively. Microbial abundances were assessed using flow cytometry. Metabarcoding results demonstrated that seasonality was the key mediator shaping virus communities, whereas depth exerted a diversifying effect within seasonal virus assemblages. Viral diversity and virus-to-prokaryote ratios (VPRs) dropped sharply at the commencement of the spring bloom but increased across the season, ultimately achieving the highest levels during the winter season. These findings suggest that viral lysis may be an important process during the polar winter, when productivity is low. Furthermore, winter viral communities consisted of Operational Taxonomic Units (OTUs) distinct from those present during the spring-summer season. Our data provided a first insight into the diversity of viruses in a hitherto undescribed marine habitat characterized by extremes in light and productivity.

Bidragsytere

Ruth-Anne Sandaa

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Bergen
Aktiv cristin-person

Julia Endresen Storesund

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Bergen

Emily Maria Olesin

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Bergen

Maria Lund Paulsen

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Bergen

Aud Larsen

  • Tilknyttet:
    Forfatter
    ved Institutt for biovitenskap ved Universitetet i Bergen
  • Tilknyttet:
    Forfatter
    ved Uni Research Miljø ved NORCE Norwegian Research Centre AS
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