Cristin-resultat-ID: 1762449
Sist endret: 18. desember 2019 12:13
Resultat
Poster
2019

Biological drivers of bacterial communities in the Arctic water inflow region

Bidragsytere:
  • Oliver Müller
  • Maria Lund Paulsen
  • Lena Seuthe
  • Aud Larsen og
  • Gunnar Bratbak

Presentasjon

Navn på arrangementet: Danish Microbiological Society Congress
Sted: København
Dato fra: 11. november 2019
Dato til: 11. november 2019

Arrangør:

Arrangørnavn: Danish Microbiological Society

Om resultatet

Poster
Publiseringsår: 2019

Beskrivelse Beskrivelse

Tittel

Biological drivers of bacterial communities in the Arctic water inflow region

Sammendrag

In the Arctic, seasonal changes are substantial and as a result marine prokaryotic community composition and functions differ greatly between the dark winter and bright summer. Interplay between abiotic and biotic drivers governs the transition from a microbial community, dominated by chemolithotrophic Archaea in winter, to photosynthetic active phytoplankton in association with fast growing opportunistic carbon degrading bacteria in summer. We studied the effects of biological drivers on the microbial community composition during different times of the year at the inflow to the Arctic Ocean, by experimentally manipulating microbial food web interactions via the exclusion of grazers of different size classes. The most profound community changes were detected during the spring to summer transition, with mutualistic phytoplankton-β-Proteobacteria interactions in early spring and substrate dependent phytoplankton-Flavobacteria interactions during bloom conditions. Grazing pressure from bacterivorous microzooplankton had an overall limited effect on prokaryotic community composition, but is likely important in structuring the community composition subsequent to the increase of carbon degrading Bacteroidetes and thereby transferring carbon to higher trophic levels.

Bidragsytere

Oliver Müller

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

Maria Lund Paulsen

  • Tilknyttet:
    Forfatter

Lena Seuthe

  • Tilknyttet:
    Forfatter
    ved Institutt for arktisk og marin biologi ved UiT Norges arktiske universitet

Aud Larsen

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

Gunnar Bratbak

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