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Showing 1–7 of 7 results
Advanced filters: Author: Christopher K. Junium Clear advanced filters

  • A brief period of warming 55.9 Myr ago has been attributed to the release of massive amounts of carbon. Geochemical and model data suggest the peak rate of carbon emission during this interval was relatively slow, and significantly lower than present-day levels of carbon emissions to the atmosphere.

    • Ying Cui
    • Lee R. Kump
    • Ian C. Harding
    Research
    Nature Geoscience
    Volume: 4, P: 481-485

  • Dahl et al. present new evidence based on leaf gas-exchange in primitive vascular plants and fossil remains of some of their earliest ancestors. This alters our thinking on how plants impacted the Earth System and climate.

    • Tais W. Dahl
    • Magnus A. R. Harding
    • Christopher K. Junium
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-10

  • The environments and food sources that sustained Ediacara biota 575-541 million years ago remain unclear. Here, the authors perform lipid biomarker and isotopic analyses on biota fossil-containing Ediacaran strata from Baltica and propose the presence of a microbial loop bolstered by bacteria.

    • Kelden Pehr
    • Gordon D. Love
    • Andrey Bekker
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-10

  • Studying the PETM, a past period of rapid warming ~56 Ma, could provide insights into ecosystem response under future warming conditions. Here, the authors present stable nitrogen isotope data that reveal a dramatic change in the marine nitrogen cycle and the emergence of anoxic conditions.

    • Christopher K. Junium
    • Alexander J. Dickson
    • Benjamin T. Uveges
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-8

  • The response of biogeochemical nitrogen cycle to Earth-surface oxygenation remains poorly known. Here, the authors show that aerobic nitrogen cycling was pervasive prior to the Great Oxygenation Event (GOE), but its evolution was complex, with diazotrophy prevailing and sustaining productivity after the GOE.

    • Genming Luo
    • Christopher K. Junium
    • Roger E. Summons
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-9

  • Nitrogen isotope data from sediments deposited during the earliest stage of the Great Oxidation Event show evidence for the emergence of a pervasive aerobic marine nitrogen cycle.

    • Aubrey L. Zerkle
    • Simon W. Poulton
    • Christopher K. Junium
    Research
    Nature
    Volume: 542, P: 465-467