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Showing 1–5 of 5 results
Advanced filters: Author: Abiel T. Kidane Clear advanced filters

  • Ammonia oxidizing archaea and Nitrospinae are the main known nitrifiers in the ocean, but the much greater abundance of the former is puzzling. Here, the authors show that differences in mortality, rather than thermodynamics, cell size or biomass yield, explain the discrepancy, without the need to invoke yet undiscovered, abundant nitrite oxidizers.

    • Katharina Kitzinger
    • Hannah K. Marchant
    • Marcel M. M. Kuypers
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-12

  • A symbiosis between a diatom and a newly discovered species of alphaproteobacteria, ‘Candidatus Tectiglobus diatomicola’, can fix nitrogen in the ocean, providing evidence that nitrogen fixers other than cyanobacteria have a key role in the marine environment.

    • Bernhard Tschitschko
    • Mertcan Esti
    • Marcel M. M. Kuypers
    ResearchOpen Access
    Nature
    Volume: 630, P: 899-904

  • N2 fixation was key to the expansion of life on Earth, but which organisms fixed N2 and if Mo-nitrogenase was functional in the low Mo early ocean is unknown. Here, the authors show that purple sulfur bacteria fix N2 using Mo-nitrogenase in a Proterozoic ocean analogue, despite low Mo conditions.

    • Miriam Philippi
    • Katharina Kitzinger
    • Marcel M. M. Kuypers
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-12

  • The origin of methane in oxic waters of the open ocean remains uncertain. This study documents methylphosphonate-driven methane formation in the tropical North Atlantic, providing insights into the ecological importance of phosphonates in the carbon cycle of the oligotrophic ocean.

    • Jan N. von Arx
    • Abiel T. Kidane
    • Jana Milucka
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-11

  • Thaumarchaeota isolates are capable of utilizing urea and cyanate for nitrification in vitro. Here, the authors show that this occurs in situ and that Thaumarchaeota are able to use urea and cyanate as an energy and nitrogen source in the marine environment.

    • Katharina Kitzinger
    • Cory C. Padilla
    • Laura A. Bristow
    Research
    Nature Microbiology
    Volume: 4, P: 234-243