New study dismisses Amazon River runoff as primary cause of sargassum blooms

Mongabay
Jun 11, 2025, 3:00 am331 ptsTrendingTop
The macroalgae pelagic sargassum is abundant in the Sargasso Sea, but since 2011, a recurrent Great Atlantic Sargassum Belt (GASB) has been observed on beaches and in satellite imagery, often extending from West Africa to the Gulf of Mexico. Millions of tons of sargassum make their way across the Caribbean each…

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