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Research: Snails were overlooked contributors to marsh destruction

lina. The research was funded by Georgia Sea Grant and The Nature Conservancy.

For part of the work, the scientists simply counted snails. They discovered "extreme densities" of 400 to 2,000 snails per square meter (about 10 square feet) on the borders between healthy and dying marsh. Those numbers compared to almost no snails on exposed grassless mud flats, and far fewer snails in healthy marsh set back from the die-off border.

The researchers also removed snails from plots of healthy marsh, then enclosed the plots with wire mesh, preventing snails from reaching the grass. They put enclosures in the path of expanding die offs, as well as in remnants of healthy marsh. After 14 months, the patches were "robust and green" compared with denuded areas where snails moved through.


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Source:University of Florida


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