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Antarctic Iceberg Calving Unveils Thriving Deep-Sea Ecosystem

The discovery of a hidden ecosystem beneath the Antarctic ice shelf offers insights into extreme environments, biodiversity, and climate change impacts.

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The research vessel Falkor (too). Photo: Schmidt Ocean Institute
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Overview

  • The calving of iceberg A-84, a 510-square-kilometer ice mass, exposed a previously inaccessible seafloor under the George VI Ice Shelf in Antarctica.
  • Researchers aboard the Schmidt Ocean Institute’s R/V Falkor (too) found a vibrant ecosystem featuring corals, sponges, icefish, giant sea spiders, and octopuses.
  • The ecosystem, likely developed over decades or centuries, raises questions about how life sustains itself in nutrient-limited environments beneath thick ice sheets.
  • Data collected during the expedition is being analyzed to improve projections of climate change impacts, including Antarctic ice sheet changes and global sea level rise.
  • The use of advanced technology, such as the ROV SuBastian, enabled exploration at depths of up to 1,300 meters, revealing potential new species and advancing deep-sea research.