MONROE CO. – A recent freshwater mussel survey conducted at Beanblossom Creek has revealed strong and thriving mussel populations, according to biologists with the nongame aquatics team and partners from Sycamore Land Trust.
During the past field season, researchers worked together to sample freshwater mussels in the Monroe County waterway, an effort aimed at identifying what species inhabit the creek and monitoring how those populations change over time. Scientists say such surveys provide valuable insight into the overall health of aquatic ecosystems and help guide conservation decisions.
Sampling in Beanblossom Creek can be particularly challenging. The creek features steep and slippery banks, debris, logjams, and stretches of water too deep to wade through. To overcome these obstacles, biologists relied on hands-on methods, using their hands and feet to locate mussels buried in the creek bottom. Their experience with mussel behavior also helped them target areas where the species are most likely to live.
Despite the difficult conditions, the team made several encouraging discoveries.
Biologists found living individuals representing 14 different species of freshwater mussels. Among the most notable findings were 529 live Pistolgrip mussel of varying ages and sizes—an indicator that the population is thriving. The species depends on certain fish, including catfish, to reproduce.
Researchers also observed evidence that most of the mussel species are successfully reproducing. According to biologists, this suggests the creek contains the right combination of host fish, suitable habitat, and adequate food and oxygen levels needed for mussels to survive and grow.
None of the mussels collected during the survey are currently listed as species of conservation need in Indiana. However, scientists say surveys like this remain important for understanding the current and historic distribution of the nearly 80 species of native freshwater mussels that once inhabited the state’s waterways.
Freshwater mussels play a key role in maintaining healthy streams and rivers. By filtering water as they feed, they help improve water quality and support aquatic habitats for other wildlife.
Efforts to monitor and restore mussel populations are supported in part by the Indiana Nongame Wildlife Fund, which helps fund surveys and restoration projects focused on rare freshwater mussel species across the state.
