Great Atlantic Sargassum Belt Becomes Permanent Biological System
The Great Atlantic Sargassum Belt, a massive 8,000-kilometer stretch of algae spanning from West Africa to the Caribbean, has been confirmed as a permanent feature of the ocean. According to a study published in Nature Communications, this belt, which emerged in 2011, has evolved from a climate-driven phenomenon into a self-sustaining biological system. The algae, with a biomass exceeding 37 million tons as of 2025, now recycle their own nutrients, creating a self-perpetuating cycle independent of atmospheric conditions. The research, led by Annalisa Bracco, also demonstrated the ability to predict algal blooms months in advance, offering a potential tool for affected regions to prepare for the arrival of the algae. This development marks a significant shift in understanding the Sargassum Belt, which has become a persistent challenge for coastal communities in the Caribbean, Gulf of Mexico, and along the African coast. 
