Blar i forfatter "Nguyen, Tan Thi"

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    • Microbial community variation in an Arctic shelf seafloor. Biogeographic and anthropogenic influences 

      Nguyen, Tan Thi (Doctoral thesis; Doktorgradsavhandling, 2017-04-21)
      Studying the spatial patterns of microbial diversity is crucial in order to assess the relationship between community structure and ecosystem function. However, due to methodological limitations in the past, relatively little has been known about the biogeography of microbial communities. The introduction of next generation sequencing technologies from 2005 was a game changer, as DNA sequencing ...

    • Perturbation of seafloor bacterial community structure by drilling waste discharge 

      Nguyen, Tan Thi; Cochrane, Sabine K.J.; Landfald, Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-31)
      Offshore drilling operations result in the generation of drill cuttings and localized smothering of the benthic habitats. This study explores bacterial community changes in the in the upper layers of the seafloor resulting from an exploratory drilling operation at 1400 m water depth on the Barents Sea continental slope. Significant restructurings of the sediment microbiota were restricted to the ...

    • Polar front associated variation in prokaryotic community structure in Arctic shelf seafloor 

      Nguyen, Tan Thi; Landfald, Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-01-23)
      Spatial variations in composition of marine microbial communities and its causes have largely been disclosed in studies comprising rather large environmental and spatial differences. In the present study, we explored if a moderate but temporally permanent climatic division within a contiguous arctic shelf seafloor was traceable in the diversity patterns of its bacterial and archaeal communities. ...

    • Seafloor deposition of water-based drill cuttings generates distinctive and lengthy sediment bacterial community changes 

      Nguyen, Tan Thi; Paulsen, John E.; Landfald, Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-27)
      The spatial extent and persistence of bacterial change caused by deposition of water-based drill cuttings on the seafloor were explored by a community-wide approach. Ten centimeter sediment cores were sampled along transects extending from ≤15 m to 250 m from three nearby drilling sites in the southern Barents Sea. Eight months, 8 years and 15 years, respectively, had passed since the completion of ...

    • Viral assemblage variation in an Arctic shelf seafloor 

      Nguyen, Tan Thi; Robertsen, Espen Mikal; Landfald, Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-02-09)
      Spatial differences in microbial communities are observable even in habitats with moderate environmental variation, such as within the pelagic zone or seafloor of geographically finite regions of the oceans. Here we explore whether biogeographical variations are also manifested at this level in the structure of viral assemblages by comparing DNA viromes from the Barents Sea upper seafloor, collected ...