Rapid Change in Polar Pelagic Ecosystems: New challenges on causes and effects of Climate Variability

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About this Research Topic

Submission deadlines

  1. Manuscript Summary Submission Deadline 5 June 2025 | Manuscript Submission Deadline 23 September 2025

  2. This Research Topic is still accepting articles.

    1. Check author guidelines

Background

Polar pelagic ecosystems, which include the open waters of the Arctic and Antarctic, are experiencing significant changes due to climate change. Rising temperatures are melting sea ice, affecting species that depend on it, such as krill in the Southern Ocean and polar cod in Arctic waters. As ice recedes, new ecosystems are forming, but they may not support the same biodiversity. Warmer waters also lead to shifts in species distributions, with temperate species moving poleward, sometimes outcompeting native species. Additionally, ocean acidification, caused by increased CO2 absorption, is harming shell-forming organisms like pteropods, which are crucial for the food web. These changes disrupt the entire ecosystem, from plankton to marine predators including penguins and seals. As the polar regions continue to warm, these ecosystems face a delicate balance between adaptation and collapse, highlighting the need for urgent conservation efforts to protect these vital marine environments.



Changing ice conditions will result in a reduction of sympagic (sea ice-associated) blooms with increases in pelagic production in the Arctic and, most likely, the Antarctic. However, sea ice melt is not uniform in nature, and it has been found that pelagic blooms can occur under thin ice cover (in the Arctic, Assmy et al. 2017). The future of the contributions of these two production pools within food webs remain uncertain. Furthermore, there is evidenced expansion of primary producers northward (Winter et al. 2014), with linkages of faster Atlantic water facilitating transport into the Arctic (Ozeil et al. 2020).



Increases in pelagic production and concomitant warming is likely to support a more diverse pelagic predator community and enhance habitat suitability for boreal predators in the Arctic Ocean, which are expanding their distribution range. Evidence of range expansions in the Arctic have already been documented for boreal fish species (reviewed in Husson et al. 2024), along with higher trophic level organisms (Heide-Jørgensen et al. 2023).



While these changes have been documented in the Arctic, there is less information available about effects of sea ice changes on Antarctic ecosystems, and these remain a key knowledge gap.





The Research Topic welcomes manuscripts related to:

• Food webs

• Coupling physical oceanography to biological trends in phytoplankton and zooplankton

• Better seasonal coverage studies on a particular species or community

• Experimental studies

• Predictive models

• Links between pelagic prey and marine predators

• How changes in the sea ice habitats are influencing biology and ecology



The Arctic and Southern Ocean are undergoing rapid change with unknown consequences for species biodiversity, resilience of marine food webs, and ocean health. Investigative studies that delve into these rates of change and predictive models will be relevant to this proposed research topic.

Article types and fees

This Research Topic accepts the following article types, unless otherwise specified in the Research Topic description:

  • Brief Research Report
  • Community Case Study
  • Data Report
  • Editorial
  • General Commentary
  • Hypothesis and Theory
  • Methods
  • Mini Review
  • Opinion

Articles that are accepted for publication by our external editors following rigorous peer review incur a publishing fee charged to Authors, institutions, or funders.

Article types

This Research Topic accepts the following article types, unless otherwise specified in the Research Topic description:

  • Brief Research Report
  • Community Case Study
  • Data Report
  • Editorial
  • General Commentary
  • Hypothesis and Theory
  • Methods
  • Mini Review
  • Opinion
  • Original Research
  • Perspective
  • Policy and Practice Reviews
  • Policy Brief
  • Review
  • Systematic Review
  • Technology and Code

Keywords: Sea ice, Trophic ecology, Southern Ocean, Carbon flux, Antarctica, Arctic, Food webs, Energetics

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