CMU Scientists Track Spread Of Invasive Snail

MT. PLEASANT — Before the zebra mussel, before the quagga mussel, the invasive faucet snail hitched a ride from Europe to the Great Lakes.

Central Michigan University’s Institute for Great Lakes Research is currently tracking and mapping the spread of these creatures. They’ve been here since the 19th Century — but their numbers and locations appear to be growing, and they threaten waterfowl in Great Lakes coastal wetlands.

“Preserving and restoring coastal wetlands and preventing their further destruction by the spread of invasive species such as the faucet snail is critical to ecosystem integrity,” said Donald Uzarski, IGLR director and professor of biology at CMU. “We are entering the fifth year of a five-year, basinwide project that covers 10,000 miles of shoreline in the U.S. and Canada, collecting data on every aspect of Great Lakes coastal wetlands with the goal of measuring ecosystem health.”

Led by Uzarski, CMU is administering a $10 million grant from the U.S. Environmental Protection Agency’s Great Lakes Restoration Initiative. IGLR researchers Tom Clement, Matt Cooper, Tom Gehring, Benjamin Heumann, Tom Langer, Neil Schock, Lee Schoen and Dave Schuberg are collecting chemical, physical and biological data from all Great Lakes basin coastal wetlands.

Their efforts recently yielded the discovery and addition of previously unknown locations of faucet snails (Bithynia tentaculata) in the Great Lakes.

Faucet Snail Locations

“We are able to populate databases such as those used by the U.S. Geological Survey with our data,” Uzarski said. “This helps everyone involved keep tabs on the locations of invasive species like the faucet snail.”

Introduced to the Great Lakes from Europe in the 1870s, presumably by the shipping industry, and found along rocky shorelines and on river and lake bottoms, faucet snails can grow up to a half inch in length. They may look harmless, but experts say they carry three intestinal parasites that kill waterfowl. They also quickly spread and establish dense populations, threaten food webs and clog intake pipes and other submerged equipment.

Faucet snails spread by attaching themselves to aquatic plants, boats, anchors and other recreational equipment. They can close their shells and survive out of water for days, which makes eradicating infestations nearly impossible.

An unwelcome guest in the Great Lakes: The faucet snail.
An unwelcome guest in the Great Lakes: The faucet snail.

“The data that CMU researchers are collecting on every aspect of the ecosystem, from chemical and physical to biological parameters, at every coastal wetland in the Great Lakes basin provides us with much more information than our intended goal of measuring ecosystem health,” Uzarski said. “Our data are becoming invaluable for the restoration and protection of the Laurentian Great Lakes ecosystem.”

In conjunction with researchers from 10 other universities — the University of Notre Dame, Grand Valley State University, the University of Minnesota-Duluth, the University of Wisconsin Green Bay, River Falls and Superior, Lake Superior State University, the University of Windsor, SUNY Brockport and Oregon State University — CMU researchers have studied more than 800 coastal wetlands in the Great Lakes basin, including those on Isle Royale.

Leave a Reply

Your email address will not be published. Required fields are marked *