Ripples Of Hope

At the bottom of rivers and streams, a rare animal helps keep the water clean.

On December 7, 2023, U.S. Fish and Wildlife Service experts and partners convened at the National Conservation Training Center in Shepherdstown, West Virginia, for the Ripple of Hope event. This celebration marked the 50th anniversary of the Endangered Species Act and showcased innovations in freshwater mussel conservation. 

“Freshwater mussels are essential to the health of rivers and streams. This is essential not just to the fish, mammals, and birds that depend on them, but to all of us as humans who rely on clean, plentiful water.” said U.S. Fish and Wildlife Service Acting Deputy Director Amy Lueders. In fact, a single freshwater mussel can filter 5-10 gallons of water every day! Despite their importance, freshwater mussels are some of the most endangered animals. There are nearly 100 protected species under the ESA in the United States, and many are at risk of extinction. Years of widespread pollution, overharvesting, and dam construction have imperiled their populations. 

The ESA provides the protection of ecosystems, conservation of endangered and threatened species, and enforcement of all treaties related to wildlife preservation. Working with state and conservation partners, the Service has placed a strong emphasis on evaluating mussel populations and establishing regulations to safeguard these species. Freshwater mussel conservation efforts have expanded exponentially, which led the National Conservation Training Center to “shine a spotlight on the amazing conservation milestones related to freshwater mussel conservation,” said NCTC Director Steve Chase. The Ripple of Hope event was offered as part of the Conservation Lecture series at NCTC. 

The ESA is one of the world’s most effective wildlife conservation laws, and the Service has been celebrating its 50th anniversary throughout 2023. Thanks to the ESA, the Service and its partners have come together on many collaborative conservation efforts to work toward the recovery of ESA-listed species as well as many other imperiled species. It’s up to all of us to continue the success of the ESA and ensure future generations can experience the wonders of the natural world we all cherish.

There are many stories about the ESA unfolding, and the work around freshwater mussel conservation  continues. Read on for more information about how freshwater mussel conservation efforts and partnerships are creating ripples of hope in conservation, science, technology, and communications!

A Story of Contrast, Ripples of Hope in Conservation

For nearly 40 years, Service Supervisory Biologist Bob Anderson has worked on the conservation of freshwater mussels. Early on in his career, Bob collaborated with landowners and partners with assistance under the ESA to protect water quality in Fish Creek, a small stream in northern Indiana and Ohio. Fish Creek was the last known location of the federally endangered white cat’s paw mussel. In 1993, a diesel fuel spill impacted the lower part of Fish Creek and the white cat’s paw has not been seen since 1999.

Bob, in turn, shared a hopeful story about the purple cat’s paw, a mussel species once presumed extinct and a close relative of the white cat’s paw mussel. On the other side of Ohio, a graduate student discovered a small purple mussel shell in 1994. The purple cat’s paw was far from its expected habitat. 

Since that time, successful captive propagation efforts have led to hundreds of purple cat’s paws being released and reintroduced into historic habitats, under section 10j of the ESA, in the Ohio River and on the Ohio River Islands National Wildlife Refuge. The purple cat’s paw remains listed as federally endangered under the ESA, but these reintroductions are critical recovery actions that the Service, federal and state agencies, and other partners can conduct utilizing the tools of the ESA.

While freshwater mussels still face many challenges, ongoing efforts to restore habitats and improve propagation offer hope for the recovery of other endangered species across the United States.

propagating purple cats paw freshwater mussel Bob Anderson USFWS.jpg.webp

Ripples of Hope in Science

The Endangered Species Act creates ripples of hope in science by facilitating and advancing discoveries. One hopeful discovery involves understanding how freshwater mussels complete their life cycle. “What a moment in time for conservation to discover how these mussels complete their lifecycle and need host fish species. In some cases, endangered fish are the only fish host species for some freshwater mussels,” said David Miko, the Service’s Fish and Aquatic Conservation Program Assistant Director. 

“Understanding freshwater mussels’ complex life cycle has really pushed us forward in terms of propagation,” said NCTC Fish and Wildlife Biologist and Course Leader Matthew Patterson. “The methods, techniques, and adaptations that have developed in freshwater mussels and allowed them to attach their larvae to the fish to complete metamorphosis are fascinating.” For example, the pocketbook freshwater mussel has adapted its mantle lure to look like a fish, complete with fins, eye spots, and even a lateral line, resembling a minnow fish. The bass serves as the host fish for the mussel’s larvae.

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