The ocean's twilight zone is deep, dark, and—according to new research—iron deficient. No sunlight reaches this region 200 to 1,000 meters below the sea surface, where levels of iron, a key micronutrient, are so low that the growth of bacteria is restricted.
Unexpected deep-sea discovery shines light on life in the twilight zone retrieved 26 September 2024 from https://phys.org/news/2024-09-unexpected-deep-sea-discovery-life.html
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