Mussels in Trouble: Nature’s Water Filters in Massive Die-Off


  The mighty Pheasantshell mussel, the workhorse water filter of rivers (center) is experiencing mass die-offs in VA and other parts of the world. (Credit Kurt Holtz)

The freshwater mussel is nature’s river cleaner.  But every autumn, for three years running, there’s been a mass die off of one of the most important species.

Biologists say if this continues, it could be a warning sign for global river ecosystems.

Robbie Harris reports from the Virginia Tennessee border.

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