The 12 Days of Aquatic Invasive Species Christmas

Happy Holidays from us here at the CFL and the brilliant folks at the University of Wisconsin Sea Grant Institute (especially Tim Campbell), who put together a delightful ode to some less-than-delightful residents of our inland waters. Enjoy!

Credit: Prairie Rivers Network
Credit: Prairie Rivers Network

On the twelfth day of Christmas, a canal brought to me: Canals have been a significant source of invasive species into the Great Lakes region. Canals can be an invasion pathway by opening previously unavailable habitat to a species (e.g. alewives, lamprey) or by allowing ships with AIS in their ballast to enter the Great Lakes (e.g. quagga mussels, spiny water flea). In fact, the pathway into the Great Lakes region for nearly all of the invasive species in this jingle can be easily tied to a canal. The only exception is the red swamp crayfish; it likely made its way into Wisconsin via an aquarium release.
Twelve quaggas clogging – Quagga mussels are now the dominant invasive mussel in Lake Michigan. A congener (a member of the same genus) of zebra mussels, the quagga mussel can tolerate colder water and colonize soft substrates. These abilities have helped it colonize most of the benthic habitat in Lake Michigan. Just like zebra mussels, quagga mussels are quite effective at clogging water intake pipes and other infrastructure. Mitigating these impacts has cost Great Lakes residents millions of dollars. Click here or the rest of the carol.

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