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Endangered Freshwater Species Shows Signs of Population Increases

November 18, 2025by Ranger Tom0
The endangered freshwater mussel species, the tan riffleshell (Epioblasma walkeri), is demonstrating signs of natural population growth for the first time within the Big South Fork National River & Recreation Area. This mussel species, known for its rarity, is only found in a handful of locations within the Big South Fork of the Cumberland and the upper Clinch Rivers.

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The tan riffleshell is an integral part of the ecosystem, providing essential services such as filtering water and providing food for other species. Despite its importance, the species has been on the brink of extinction due to habitat loss and pollution. This recent observation of population growth indicates a positive shift in the survival of the species.

The increase in the tan riffleshell population is a significant development for the National Park Service and conservationists who have been working tirelessly to protect and preserve the species. This development brings hope for the future of the tan riffleshell and other endangered species within the Big South Fork National River & Recreation Area.

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