Blar i forfatter "John, Uwe"

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    • Biogeographic gradients of picoplankton diversity indicate increasing dominance of prokaryotes in warmer Arctic fjords 

      Hörstmann, Cora; Hattermann, Tore; Thomé, Pauline C.; Buttigieg, Pier Luigi; Morel, Isidora; Waite, Anya M.; John, Uwe (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-02)
      limate change is opening the Arctic Ocean to increasing human impact and ecosystem changes. Arctic fjords, the region’s most productive ecosystems, are sustained by a diverse microbial community at the base of the food web. Here we show that Arctic fjords become more prokaryotic in the picoplankton (0.2–3 µm) with increasing water temperatures. Across 21 fjords, we found that Arctic fjords had ...

    • Limits to the cellular control of sequestered cryptophyte prey in the marine ciliate Mesodinium rubrum 

      Altenburger, Andreas; Cai, Huimin; Li, Qiye; Drumm, Kirstine; Kim, Miran; Zhu, Yuanzhen; Garcia-Cuetos, Lydia; Zhan, Xiaoyu; Hansen, Per Juel; John, Uwe; Li, Shuaicheng; Lundholm, Nina (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-23)
      The marine ciliate <i>Mesodinium rubrum</i> is famous for its ability to acquire and exploit chloroplasts and other cell organelles from some cryptophyte algal species. We sequenced genomes and transcriptomes of free-swimming <i>Teleaulax amphioxeia</i>, as well as well-fed and starved <i>M. rubrum</i> in order to understand cellular processes upon sequestration under different prey and light ...