'The Coastlines Are Not Built for This'

Key Points:

• Large amounts of sargassum seaweed, totaling about 27 million metric tons in July, are covering Caribbean and Gulf of Mexico coastlines, causing environmental damage and harming tourism-dependent regions.
• The Great Atlantic Sargassum Belt, which has been growing since 2011, is influenced by factors such as agricultural runoff, warming waters, and changing wind and current patterns, with this year's early reproduction linked to last year's record 40 million metric tons.
• While sargassum provides important habitat for marine life in open waters, its accumulation near shore reduces oxygen, blocks sunlight, and damages ecosystems like mangroves and coral reefs, also hindering sea turtle hatchlings' access to the ocean.
• Efforts by governments in affected areas to manage the seaweed are complicated by the environmental risks posed by removal methods, including potential destruction of fragile turtle nests due to heavy machinery use.
• Experts emphasize that the scale and timing of this sargassum bloom are unprecedented, indicating shifting oceanic conditions and posing ongoing challenges for coastal ecosystems and communities.