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Antarctic phytoplankton communities restructure under shifting sea-ice regimes

Author

Listed:
  • Alexander Hayward

    (Danish Meteorological Institute
    Earth Sciences New Zealand (formerly NIWA)
    University of Otago)

  • Simon W. Wright

    (University of Tasmania)

  • Dustin Carroll

    (Moss Landing Marine Laboratories
    Jet Propulsion Laboratory (California Institute of Technology))

  • Cliff S. Law

    (Earth Sciences New Zealand (formerly NIWA)
    University of Otago)

  • Pat Wongpan

    (University of Tasmania)

  • Andrés Gutiérrez-Rodriguez

    (Earth Sciences New Zealand (formerly NIWA)
    Centro Oceanográfico de Gijón (IEO-CSIC))

  • Matthew H. Pinkerton

    (Earth Sciences New Zealand (formerly NIWA))

Abstract

Phytoplankton are critical to the Antarctic marine food web and associated biological carbon pump, yet long-term shifts in their community composition are poorly understood. Here, using a machine learning framework and combining pigment samples and environmental samples from austral summertime 1997–2023, we show declines in diatoms and increases in haptophytes and cryptophytes across much of Antarctica’s continental shelf. These trends—which are linked to sea ice increases—reversed after 2016, with a rebound in diatoms and a large increase in cryptophytes, coinciding with the loss of sea ice. Significant changes (P

Suggested Citation

  • Alexander Hayward & Simon W. Wright & Dustin Carroll & Cliff S. Law & Pat Wongpan & Andrés Gutiérrez-Rodriguez & Matthew H. Pinkerton, 2025. "Antarctic phytoplankton communities restructure under shifting sea-ice regimes," Nature Climate Change, Nature, vol. 15(8), pages 889-896, August.
    • Handle: RePEc:nat:natcli:v:15:y:2025:i:8:d:10.1038_s41558-025-02379-x
    DOI: 10.1038/s41558-025-02379-x
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