![Mangroves with dense roots trap mud more effectively. Credit: Barend van Maanen](/sites/default/files/Mangroves_doubletrouble.jpg)
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Some of the world's most valuable ecosystems are facing a "triple threat" to their long-term durability and survival, new research shows. The study found that mangrove forests, their large biodiversity and the coastal protection they provide are under pressure from three distinct threats—sea-level rise, lack of mud and squeezed habitats.