Invasive mussels imperil western water system

(AP) -- Two years after an invasive mussel was first discovered at Lake Mead, the population has firmly established itself and gone on a breeding binge, with numbers soaring into the trillions.

Zebra mussels hang on while quagga mussels take over

The zebra mussels that have wreaked ecological havoc on the Great Lakes are harder to find these days — not because they are dying off, but because they are being replaced by a cousin, the quagga mussel. But zebra mussels ...

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