AI Insight
New research challenges the long-held scientific assumption that large phytoplankton are primarily responsible for transporting carbon to the deep ocean through the biological carbon pump. A study by Jingjing Zhang and colleagues suggests that tiny cyanobacteria may play a more significant role in ocean carbon sequestration than previously understood. The biological carbon pump moves organic carbon from surface waters to the ocean floor, where it can remain sequestered for hundreds to thousands of years.
Why it matters
Understanding which organisms most effectively sequester ocean carbon is crucial for accurately modeling Earth's carbon cycle and predicting climate change impacts. This finding could reshape ocean conservation strategies and inform approaches to managing marine ecosystems for carbon capture.
Understand the Science
A process known as the biological carbon pump (BCP) moves organic carbon from near the ocean’s surface to the ocean floor. That carbon often stays there for hundreds or thousands of years, making the BCP a primary source of carbon sequestration in the oceans. Scientists have thought that relatively large phytoplankton are more efficient at exporting carbon to the deep ocean than tiny cyanobacteria, but new research by Jingjing Zhang and colleagues published in AGU Advances now calls that belief into question.
Source: Tiny cyanobacteria may be the secret heroes of ocean carbon sequestration