Sea snail killers.(Periwinkles)
Science Teacher, The, February, 2006
Periwinkles, the spiral-shelled snails commonly found along rocky U.S. shorelines, play a primary role in the unprecedented disappearance of salt marsh in the southeastern states, according to research published in Science.
Based on extensive field studies, the work challenges six decades of salt marsh science. Ecologists have long thought that stressed soil--too much salt, not enough oxygen--was the main killer of this critical marine habitat.
But Brian Silliman, a Brown University research fellow and a University of Florida assistant professor, said drought-stressed soils pave the way for predatory periwinkles that spread fungal disease as they graze on cordgrass.
"Snails can transform healthy marsh to mudflats in a matter of months,"...
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