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Icebergs Drop Stones, Boost Deep Sea Life
7 Jul
Summary
- Melting icebergs are increasing dropstones on the ocean floor.
- Dropstones provide essential habitats for deep-sea marine life.
- Warming oceans are linked to a rise in Arctic iceberg calving.
A recent study published in Nature highlights how warming oceans are significantly increasing the number of icebergs calving into the Arctic's Fram Strait. Scientists observed that these icebergs carry rocks, which they then deposit on the seafloor as they melt. These deposited rocks, known as dropstones, are acting as crucial habitats.
These dropstones provide a foundation for corals, sponges, and other marine invertebrates to attach to. This, in turn, supports a wider range of biodiversity, including shrimps and sea lilies, creating a flourishing deep-sea community. The research utilized 40 years of iceberg data and deep-sea imagery to connect increased iceberg frequency since the early 2000s to these enhanced seafloor ecosystems.
This phenomenon offers a surprising silver lining to the detrimental effects of climate change in polar regions. While melting glaciers pose catastrophic threats to surface and land-based life, the increased dropstones are fostering unexpected biodiversity gains in the deep ocean, reshaping the environment hundreds of meters below the surface.
