Short Wave
The Algae That Thrive in Arctic Darkness
Mar 26, 2025
Clara Hoppe, a biogeochemist at the Alfred Wegener Institute, dives into the fascinating world of Arctic microalgae. She reveals how these tiny organisms defy expectations during the extended darkness of winter, managing to photosynthesize and thrive. Clara shares insights from her research expeditions in the Svalbard Archipelago, illustrating their remarkable resilience and survival strategies. The discussion sheds light on how these microorganisms adapt to extreme conditions, reshaping our understanding of the Arctic ecosystem.
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Quick takeaways
- Recent research reveals that some microalgae remain active and ready for photosynthesis during the Arctic polar night, challenging past assumptions.
- Microalgae adapt to extreme darkness by utilizing mixotrophy, allowing them to thrive in harsh conditions and enhance Arctic ecosystem productivity.
Deep dives
The Polar Night Phenomenon
The polar night is a unique phenomenon that occurs in Arctic regions, characterized by several months of darkness where the sun never rises. During this time, the environment transforms into a grayscale world, creating an eerie but fascinating landscape filled with stars and the moon's glow. This period challenges traditional understandings of life in extreme conditions, particularly the assumed dormancy of microalgae during winter. However, recent research has sparked curiosity about the hidden activities and survival mechanisms of these organisms during the harsh Arctic winter.
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