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The westward spread of zebra and quagga mussels shows how tiny invaders can cause big problems

  • Written by Christine Keiner, Chair, Department of Science, Technology, and Society, Rochester Institute of Technology
The westward spread of zebra and quagga mussels shows how tiny invaders can cause big problemsA boat propeller encrusted with zebra mussels.NPS/Flickr

The zebra mussel has been a poster child for invasive species ever since it unleashed economic and ecological havoc on the Great Lakes in the late 1980s. Yet despite intensive efforts to control it and its relative, the quagga mussel, these fingernail-sized mollusks are spreading through U.S....

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